Abrégé

The present invention provides a process for recovering ε-caprolactam and polyether polyurethane from polyamide 6 and polyether polyurethane comprising material in a plant, wherein the plant comprises a separation section [B], a depolymerization section [C], a recovery section [D] and a purification section [E]. The invention further provides apparatus suitable for carrying out the above process and polyether polyurethane and ε-caprolactam obtained by the process of the invention.

Classes IPC  ?

• C08J 11/08 - Récupération ou traitement des résidus des polymères sans réaction chimique utilisant des solvants sélectifs des constituants polymères
• C08J 11/12 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation uniquement par traitement à la chaleur sèche
• C08J 11/14 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec de la vapeur ou de l'eau

Abrégé

The application provides a process for recovering purified ε-caprolactam from nylon 6-containing multi-component material which comprises the steps of a) providing a pre-concentrated nylon 6-containing material obtained by extraction, b) depolymerization, c) recovery, and d) purification that comprises extraction, back-extraction, distillation and crystallization.

Classes IPC  ?

• C07D 201/12 - Préparation des lactames par dépolymérisation de polyamides
• C07D 201/16 - Séparation ou purification
• C07D 223/10 - Atomes d'oxygène liés en position 2
• C08G 69/14 - Lactames
• C08J 11/14 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec de la vapeur ou de l'eau

Abrégé

The present invention provides a process for recovering nylon 6 and spandex from nylon 6 and spandex products in a plant, wherein the plant comprises a separation section [B], which comprises a dissolution section [α] and a precipitation section [γ].

Classes IPC  ?

• C08J 11/08 - Récupération ou traitement des résidus des polymères sans réaction chimique utilisant des solvants sélectifs des constituants polymères

Abrégé

The present invention provides a process for recovering ε-caprolactam and polyether polyurethane from nylon 6 and polyether polyurethane comprising material in a plant, wherein the plant comprises a separation section [B], a depolymerization section [C], a recovery section [D], and a purification section [E].

Classes IPC  ?

• C08J 11/08 - Récupération ou traitement des résidus des polymères sans réaction chimique utilisant des solvants sélectifs des constituants polymères
• C08J 11/12 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation uniquement par traitement à la chaleur sèche
• C08J 11/14 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec de la vapeur ou de l'eau

Abrégé

22 equivalent per kg purified e-caprolactam (based on data originating from ecoinvent version 3.7.1; location: Europe).

Classes IPC  ?

• C07D 201/12 - Préparation des lactames par dépolymérisation de polyamides
• C07D 223/10 - Atomes d'oxygène liés en position 2
• C07D 201/04 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann
• C07D 201/16 - Séparation ou purification
• C08J 11/14 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec de la vapeur ou de l'eau
• B09B 3/45 - Traitement à la vapeur, p. ex. gazéification ou oxydation de l'eau supercritique
• B09B 3/70 - Traitement chimique, p. ex. ajustement du pH ou oxydation
• B09B 3/80 - Destruction de déchets solides ou transformation de déchets solides en quelque chose d'utile ou d'inoffensif impliquant une étape d'extraction
• C08J 11/08 - Récupération ou traitement des résidus des polymères sans réaction chimique utilisant des solvants sélectifs des constituants polymères
• B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
• B32B 27/34 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyamides

Abrégé

The present invention provides a process and a plant for recovering purified ε-caprolactam from polyamide 6 comprising fishing nets, wherein the plant comprises a depolymerization section [B], a recovery section [C], and a purification section [D], The present invention also provides purified e-caprolactam that has a particularly low product carbon footprint and is obtained via depolymerization of polyamide 6 from fishing nets.

Classes IPC  ?

• C07D 201/12 - Préparation des lactames par dépolymérisation de polyamides
• B09B 3/45 - Traitement à la vapeur, p. ex. gazéification ou oxydation de l'eau supercritique
• B09B 3/70 - Traitement chimique, p. ex. ajustement du pH ou oxydation
• B09B 3/80 - Destruction de déchets solides ou transformation de déchets solides en quelque chose d'utile ou d'inoffensif impliquant une étape d'extraction
• C07D 201/16 - Séparation ou purification
• C07D 223/10 - Atomes d'oxygène liés en position 2
• C08J 11/14 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec de la vapeur ou de l'eau

Abrégé

The present invention provides a process and a plant for recovering purified E-caprolactam from nylon 6 comprising fishing nets, wherein the plant comprises a depolymerization section [B], a recovery section [C], and a purification section [D], The present invention also provides purified e-caprolactam that has a particularly low product carbon footprint and is obtained via depolymerization of nylon 6 from fishing nets. In a second preferred embodiment, the purification of the distilled caprolactam is achieved by crystallization in a process of concentrating. The crystallized caprolactam resulting from concentrating is generally sufficiently pure to be used directly. After crystallization, it may be necessary to purify the mother liquor by, for example, recycling it to the aqueous solution before the extraction with the alkyl phenol. The mother liquor can be purified for example by means of distillation.

Classes IPC  ?

• C07D 201/12 - Préparation des lactames par dépolymérisation de polyamides
• C07D 201/16 - Séparation ou purification
• C08J 11/12 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation uniquement par traitement à la chaleur sèche
• C08J 11/14 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec de la vapeur ou de l'eau
• C08J 11/16 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec une substance inorganique

Abrégé

The invention provides a process for the production of crystalline ammonium sulfate, wherein the process comprises performing a Beckmann rearrangement reaction, neutralizing the Beckmann rearrangement reaction mixture, separating a first aqueous ammonium sulfate phase and an aqueous ε-caprolactam phase, charging the first ammonium sulfate phase to a first evaporative type crystallization section wherein crystalline ammonium sulfate is obtained, discharging from the first evaporative type crystallization section mother liquor enriched in organic components, extracting the aqueous ε-caprolactam phase to obtain an extracted ε-caprolactam phase and a second aqueous ammonium sulfate phase, discharging the mother liquor that is discharged from the first evaporative type crystallization section and/or the second aqueous ammonium sulfate phase to a second evaporative type crystallization section wherein evaporative type crystallization is performed so that a three-phase system occurs. At least a liquid oily phase is recovered from the three-phase system. The invention further provides a plant suitable to carry out the process of the invention, crystalline ammonium sulfate and a liquid oily phase obtained by the process of the invention.

Classes IPC  ?

• C01C 1/242 - Préparation à partir d'ammoniaque et d'acide sulfurique ou d'anhydride sulfurique
• C07D 201/06 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann à partir de cétones avec formation d'oxime et réarrangement simultanés
• C07D 201/16 - Séparation ou purification

Abrégé

The invention provides a process and a plant for the production of ε-caprolactam and crystalline ammonium sulfate in an industrial-scale plant, wherein the plant comprises a Beckmann rearrangement reaction section, an ammonium sulfate crystallization section, and one or more heat exchangers configured to transfer heat from the Beckmann rearrangement reaction section to the ammonium sulfate crystallization section and wherein the process comprises the steps of: a) feeding (i) cyclohexanone oxime and (ii) oleum and/or sulfuric acid to the Beckmann rearrangement reaction section b) reacting components (i) and (ii) in the Beckmann rearrangement reaction section to form a reaction mixture comprising ε-caprolactam, whereby heat of reaction is generated; c) discharging the reaction mixture comprising ε-caprolactam from the Beckmann rearrangement reaction section; d) removing partially or fully the heat of reaction generated in the Beckmann rearrangement reaction section by one or more heat exchangers configured to transfer heat from the Beckmann rearrangement reaction section; e) feeding an aqueous liquid comprising ammonium sulfate to the ammonium sulfate crystallization section; f) introducing heat into the ammonium sulfate crystallization section comprising the aqueous ammonium-sulfate-comprising liquid by one or more heat exchangers configured to transfer heat into the ammonium sulfate crystallization section; g) forming ammonium sulfate crystals by evaporative crystallization in the ammonium sulfate crystallization section; characterized in that h) the heat of reaction removed from the Beckmann rearrangement reaction section in step d) is at least partially or fully transferred to the ammonium sulfate crystallization section in step f).

Classes IPC  ?

• C07D 201/04 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann

Abrégé

The present invention provides an improved process for controlling an exothermic vapor phase hydrogenation of phenol that is catalyzed by a palladium comprising catalyst in an industrial scale hydrogenation reactor, wherein the reactor is charged with an ingoing mixture and from which is discharged an outgoing mixture, and wherein at least part of the hydrogen in the outgoing mixture is recycled to the ingoing mixture, and wherein at least part of the heat of reaction is transferred to a coolant, wherein the process comprises steps of measuring inline and controlling several process parameters. The invention also provides a plant that is configured to carry out the process of the invention.

Classes IPC  ?

• C07C 45/00 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés
• C07C 49/403 - Composés saturés comportant un groupe cétone faisant partie d'un cycle d'un cycle à six chaînons
• C07C 29/20 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par hydrogénation de liaisons doubles ou triples carbone-carbone dans des cycles aromatiques à six chaînons dans des cycles non condensés substitués par des groupes hydroxyle
• C07C 35/08 - Composés comportant au moins un groupe hydroxyle ou O-métal lié à un atome de carbone d'un cycle autre qu'un cycle aromatique à six chaînons monocycliques contenant des cycles à six chaînons
• B01J 19/00 - Procédés chimiques, physiques ou physico-chimiques en généralAppareils appropriés

Abrégé

The invention provides a process for the production of crystalline ammonium sulfate, wherein the process comprises performing a Beckmann rearrangement reaction, neutralizing the Beckmann rearrangement reaction mixture, separating a first aqueous ammonium sulfate phase and an aqueous ε-caprolactam phase, charging the first ammonium sulfate phase to a first evaporative type crystallization section wherein crystalline ammonium sulfate is obtained, discharging from the first evaporative type crystallization section mother liquor enriched in organic components, extracting the aqueous ε-caprolactam phase to obtain an extracted ε-caprolactam phase and a second aqueous ammonium sulfate phase, discharging the mother liquor that is discharged from the first evaporative type crystallization section and/or the second aqueous ammonium sulfate phase to a second evaporative type crystallization section wherein evaporative type crystallization is performed so that a three-phase system occurs. At least a liquid oily phase is recovered from the three-phase system. The invention further provides a plant suitable to carry out the process of the invention, crystalline ammonium sulfate and a liquid oily phase obtained by the process of the invention.

Classes IPC  ?

• C01C 1/242 - Préparation à partir d'ammoniaque et d'acide sulfurique ou d'anhydride sulfurique
• C07D 201/04 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann
• C07D 201/16 - Séparation ou purification
• B01D 9/00 - Cristallisation
• B01D 11/04 - Extraction par solvants de solutions

Abrégé

The invention provides a process and a plant for the production of ε-caprolactam and crystalline ammonium sulfate in an industrial-scale plant, wherein the plant comprises a Beckmann rearrangement reaction section, an ammonium sulfate crystallization section, and one or more heat exchangers configured to transfer heat from the Beckmann rearrangement reaction section to the ammonium sulfate crystallization section and wherein the process comprises the steps of: a) feeding (i) cyclohexanone oxime and (ii) oleum and/or sulfuric acid to the Beckmann rearrangement reaction section b) reacting components (i) and (ii) in the Beckmann rearrangement reaction section to form a reaction mixture comprising ε-caprolactam, whereby heat of reaction is generated; c) discharging the reaction mixture comprising ε-caprolactam from the Beckmann rearrangement reaction section; d) removing partially or fully the heat of reaction generated in the Beckmann rearrangement reaction section by one or more heat exchangers configured to transfer heat from the Beckmann rearrangement reaction section; e) feeding an aqueous liquid comprising ammonium sulfate to the ammonium sulfate crystallization section; f) introducing heat into the ammonium sulfate crystallization section comprising the aqueous ammonium-sulfate-comprising liquid by one or more heat exchangers configured to transfer heat into the ammonium sulfate crystallization section; g) forming ammonium sulfate crystals by evaporative crystallization in the ammonium sulfate crystallization section; characterized in that h) the heat of reaction removed from the Beckmann rearrangement reaction section in step d) is at least partially or fully transferred to the ammonium sulfate crystallization section in step f).

Classes IPC  ?

• C07D 223/10 - Atomes d'oxygène liés en position 2
• C07D 201/04 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann

Produits et services

Chemical substances, chemical materials and chemical preparations for use in industry, in particular synthetic chemical precursor products, chemical intermediates for use in manufacture, in particular chemical intermediates and chemical precursor products for use in manufacture of artificial and synthetic resins, raw (unprocessed) artificial resins, in particular polyamide or nylon, in particular polyamide 6, nylon 6, co-polymers; precursors and monomers for the manufacture of artificial and synthetic resins, precursor compounds for manufacturing artificial yarns and threads for textile use; artificial and synthetic resins for use in manufacture, raw synthetic resins in the form of liquids, paste, powder, granules, pastes; polyamide resins; synthetic chemical precursor products for fire extinguishing compositions, fire proofing compositions, tempering and soldering preparations, substances for preserving foodstuffs, tanning substances, industrial adhesives.

Produits et services

Chemical substances and preparations for use in industry, namely, synthetic precursor chemicals and intermediate chemicals for use in the manufacture of artificial and synthetic resins; precursors and monomers all being industrial chemicals and chemical additives for the manufacture of artificial and synthetic resins; precursor compounds being industrial chemicals for manufacturing artificial yarns and threads for textile use; artificial and synthetic resins, unprocessed, for use in manufacture; raw unprocessed synthetic resins in the form of liquids, pastes, powder, and granules; unprocessed polyamide resins; synthetic chemical precursor products in the nature of fire extinguishing compositions; fire prevention compositions; tempering and soldering preparations; chemical substances for preserving foodstuffs; tanning agents for use in the manufacture of leather; industrial adhesives

Produits et services

Chemical substances, chemical materials and chemical preparations for use in industry, in particular synthetic chemical precursor products, chemical intermediates for use in manufacture, in particular chemical intermediates and chemical precursor products for use in manufacture of artificial and synthetic resins, raw (unprocessed) artificial resins, in particular polyamide or nylon, in particular polyamide 6, nylon 6, co-polymers; precursors and monomers for the manufacture of artificial and synthetic resins, precursor compounds for manufacturing artificial yarns and threads for textile use; nitrogen based chemicals and nitrogen compounds, in particular amides and amine compounds and their derivatives; amides for use in industry; amides for use in manufacture; cyclic amides; artificial and synthetic resins for use in manufacture, raw synthetic resins in the form of liquids, paste, powder, granules, pastes; polyamide resins; synthetic chemical precursor products for fire extinguishing compositions, fire proofing compositions, tempering and soldering preparations, substances for preserving foodstuffs, tanning substances, industrial adhesives.

Produits et services

(1) Chemical substances, chemical materials and chemical preparations for use in industry, in particular synthetic chemical precursor products, chemical intermediates for use in manufacture, in particular chemical intermediates and chemical precursor products for use in manufacture of unprocessed and semi-processed artificial and synthetic resins; raw (unprocessed) artificial resins, in particular polyamide or nylon, in particular polyamide 6, nylon 6, co-polymers; precursors and monomers for the manufacture of unprocessed and semi-processed artificial and synthetic resins, precursor compounds for manufacturing artificial yarns and threads for textile use; nitrogen based chemicals and nitrogen compounds, in particular amides and amine compounds and their derivatives; amides for use in industry, namely polyamides; amides for use in manufacture, namely, polyamide; cyclic amides; unprocessed artificial and synthetic resins for use in manufacture, raw unprocessed synthetic resins in the form of liquids, paste, powder, granules, pastes; polyamide resins; synthetic chemical precursor products for fire extinguishing compositions, fire proofing compositions, tempering and soldering preparations, chemical preparations for preserving foodstuffs

Produits et services

Chemical substances and preparations for use in industry, namely, synthetic precursor chemicals and intermediate chemicals for use in the manufacture of artificial and synthetic resins *, namely, polyamide or nylon, in particular polyamide 6, nylon 6, co-polymers * ; precursors and monomers all being industrial chemicals and chemical additives for the manufacture of artificial and synthetic resins; precursor compounds being industrial chemicals for manufacturing artificial yarns and threads for textile use; nitrogen based chemicals and nitrogen chemical compounds, in particular amides and amine chemical compounds and their derivatives as raw materials for use in the manufacture of industrial, consumer, and household products; amides being chemicals for use in industry; amides being chemicals for use in the manufacture of industrial, consumer, and household products; cyclic amides being industrial chemicals; artificial and synthetic resins, unprocessed, for use in manufacture; raw unprocessed synthetic resins in the form of liquids, paste, powder, and granules; unprocessed polyamide resins; synthetic chemical precursor products in the nature of fire extinguishing compositions; fire prevention compositions; tempering and soldering preparations; tanning substances for use in the manufacture of leather; industrial adhesives; * all of the aforementioned goods not for cleaning, hygiene, sanitation and water treatment products; * all of the foregoing goods being other than as ingredients for the manufacture of food, beverages and food supplements, and all of the foregoing goods excluding lactic acid and polylactic acid

Abrégé

The present invention provides an improved process for the continuous production of an essentially pure oxime, wherein the oxime is formed by reacting hydroxylamine with an aldehyde or a ketone, wherein the hydroxylamine is formed in an aqueous phosphate-containing acidic solution by hydrogenation of nitrate ions or nitrogen oxides in the presence of titanium ions at a concentration of 0.05 to 25 mg/kg of said aqueous phosphate-containing acidic solution, and in the presence of a hydrogenation catalyst; an essentially pure cyclohexanone oxime obtainable therefrom; and a chemical plant for the continuous production of an essentially pure oxime.

Classes IPC  ?

• C07C 249/08 - Préparation de composés contenant des atomes d'azote, liés par des liaisons doubles à un squelette carboné d'oximes par réaction d'hydroxylamines avec des composés carbonylés
• C07C 251/44 - Oximes avec des atomes d'oxygène de groupes oxyimino liés à des atomes d'hydrogène ou à des atomes de carbone de radicaux hydrocarbonés non substitués avec l'atome de carbone d'au moins un des groupes oxyimino faisant partie d'un cycle autre qu'un cycle aromatique à six chaînons
• C01B 21/14 - HydroxylamineSes sels

Abrégé

The present invention provides a process for the production of an oxime, the process comprising: a. converting an aldehyde or a ketone by a chemical reaction into an oxime at a temperature of 15 to 115 °C, whereby a reaction mixture comprising the formed oxime is obtained; b. recovering the formed oxime from the reaction mixture; c. producing a first aqueous phase that contains phosphate ions; d. reducing the content of phosphate ions in the first aqueous phase, whereby a second aqueous phase is formed; and e. discharging the second aqueous phase, wherein the reduction of the content of phosphate ions in the first aqueous phase is achieved by 1 ) forming a salt in which the molar ratio of N: Mg: P is about 1: 1: 1; and 2) separating the salt in which the molar ratio of N: Mg: P is about 1: 1: 1 from the second aqueous phase; a fertilizer product comprising magnesium ammonium phosphate hexahydrate obtained thereof; cyclohexanone oxime obtained thereof; and a chemical plant suitable for the production of an oxime.

Classes IPC  ?

• B01J 3/00 - Procédés utilisant une pression supérieure ou inférieure à la pression atmosphérique pour obtenir des modifications chimiques ou physiques de la matièreAppareils à cet effet
• C07C 249/08 - Préparation de composés contenant des atomes d'azote, liés par des liaisons doubles à un squelette carboné d'oximes par réaction d'hydroxylamines avec des composés carbonylés
• C07C 251/44 - Oximes avec des atomes d'oxygène de groupes oxyimino liés à des atomes d'hydrogène ou à des atomes de carbone de radicaux hydrocarbonés non substitués avec l'atome de carbone d'au moins un des groupes oxyimino faisant partie d'un cycle autre qu'un cycle aromatique à six chaînons

Abrégé

An industrial scale continuous process for the production and recovery of cyclohexanone from phenol and hydrogen, said process comprising: hydrogenating phenol in a phenol hydrogenation reactor; separating cyclohexanone from a hydrogenated product stream in a separation and purification section [II] comprising at least 4 distillation sections; wherein at least some of the reaction heat produced in the phenol hydrogenation reaction section [I] is applied for the production of steam; and wherein the molar ratio of cyclohexanone to phenol that is charged to said phenol hydrogenation reactor is from 0.02 to 0.10; and/or wherein the molar ratio of cyclohexanol to phenol that is charged to said phenol hydrogenation reactor is from 0.001 to 0.10.

Classes IPC  ?

• C07C 45/82 - SéparationPurificationStabilisationEmploi d'additifs par modification de l'état physique, p. ex. par cristallisation par distillation
• C07C 45/00 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés
• C07C 29/20 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par hydrogénation de liaisons doubles ou triples carbone-carbone dans des cycles aromatiques à six chaînons dans des cycles non condensés substitués par des groupes hydroxyle
• C07C 29/80 - SéparationPurificationStabilisationEmploi d'additifs par traitement physique par distillation

Produits et services

Ammonium sulphate; flame retardants; tanning substances for leather; hardener substances for laminates; substances for metal purification; water treatment preparations; chemicals (additives, precursor products) containing ammonium sulphate in the form of food additives for animals and humans, additives for yeast products, additives for pharmacological products, additives for cellulosic insulation materials, additives for dyes, additives for persulfate production, additives for synthetic sausage casings.

Abrégé

A process for the construction of a second chemical plant, which second chemical plant is suitable for the separation of cyclohexanone from a second mixture, which second mixture comprises reaction products from the hydrogenation of phenol. The process comprises providing a first chemical plant, which first chemical plant is suitable for the separation of cyclohexanone from a first mixture, and a second chemical plant comprising a distillation column suitable for distilling overhead cyclohexanone reused from the first chemical plant.

Classes IPC  ?

• B01D 3/00 - Distillation ou procédés d'échange apparentés dans lesquels des liquides sont en contact avec des milieux gazeux, p. ex. extraction
• C07C 45/82 - SéparationPurificationStabilisationEmploi d'additifs par modification de l'état physique, p. ex. par cristallisation par distillation
• B01D 3/12 - Distillation moléculaire
• B01D 3/10 - Distillation sous vide
• B01D 3/14 - Distillation fractionnée
• C07C 27/28 - PurificationSéparationStabilisation par distillation
• C07C 35/08 - Composés comportant au moins un groupe hydroxyle ou O-métal lié à un atome de carbone d'un cycle autre qu'un cycle aromatique à six chaînons monocycliques contenant des cycles à six chaînons
• C07C 45/00 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés
• C07C 49/403 - Composés saturés comportant un groupe cétone faisant partie d'un cycle d'un cycle à six chaînons

Abrégé

The invention relates to ammonium sulfate granules, comprising at least 98 wt.% ammonium sulfate and up to 2 wt.-% binder, based on the combined weight of ammonium sulfate and binder, said granules having a crushing strength of at least 2.5 kg/granule measured according to IFDC S-115 and an angle of repose of 40° or less measured according to IFDC S-110. The invention further relates to the use of these ammonium sulfate granules as fertilizer, a fertilizer composition comprising these ammonium sulfate granules and a method for the production of these ammonium sulfate granules comprising the following steps: a) grinding ammonium sulfate raw material; b) mixing the grinded material obtained in step a) with binder; c) wet granulating the mixture obtained in step b); d) drying the ammonium sulfate granules obtained in step c).

Classes IPC  ?

• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
• C05G 3/00 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais
• C01C 1/24 - Sulfates d'ammonium
• C01C 1/248 - Prévention de la coalescence ou moyen pour influer sur la forme ou la dimension des cristaux

Produits et services

flame retardants in the nature of flame retardant compositions; tanning substances for leather; chemical additives for use as hardener substances for laminates; chemical substances for metal purification; water treatment preparations; chemical additives in the form of food additives for animals and humans, chemical additives for yeast products, chemical additives for use in the manufacture of pharmacological products, chemical additives for cellulosic insulation materials, chemical additives for dyes, chemical additives for persulfate production, chemical additives for use in the manufacture of synthetic sausage casings

Produits et services

Chemical substances, chemical materials and chemical preparations for use in industry, in particular synthetic chemical precursor products, chemical intermediates for use in manufacture, in particular chemical intermediates and chemical precursor products for use in manufacture of artificial and synthetic resins, raw (unprocessed) artificial resins, in particular polyamide or nylon, in particular polyamide 6 or nylon 6; precursors and monomers for the manufacture of artificial and synthetic resins, raw (unprocessed) artificial resins, in particular polyamide resins, in particular polyamide or nylon, in particular polyamide 6 or nylon 6; precursor compounds for manufacturing artificial yarns and threads for textile use; nitrogen based chemicals and nitrogen compounds, in particular amides, oximes, amines or ammonium compounds and their derivatives; amides for use in industry; amides for use in manufacture; cyclic amides or lactams, in particular caprolactam; inorganic salts for industrial purposes, in particular ammonium salts, in particular ammonium sulfate; precursors, intermediates and by-products of caprolactam production, in particular cyclohexanone, cyclohexanole, cyclohexanone oxime, hydroxylamine phosphate oxime, and ammonium sulfate; artificial and synthetic resins, artificial and synthetic resins for use in manufacture, raw (unprocessed) artificial resins, raw (unprocessed) artificial resins for use in industry; raw synthetic resins in the form of liquids, paste or powder; unprocessed artificial resins as raw materials in the form of granules, powders, liquids or pastes; polyamide resins, in particular polyamide or nylon, in particular polyamide 6 or nylon 6; synthetic chemical precursor products for fire extinguishing compositions, fire proofing compositions, tempering and soldering preparations, substances for preserving foodstuffs, tanning substances, industrial adhesives. Polymer resin fibers (other than for use in textiles). Business consulting and business process management in the field of chemical production, including financial feasibility studies, namely studies with respect to the cost effectiveness of new chemical processes, plants and installations and extension and/ or modification of existing chemical plants and installations. Building construction advice, repair work advice. Educational instruction, industrial training, consultancy services relating to engineering education, in the field of chemical manufacturing installations comprising technical, legal and regulatory, commercial subjects; courses; tuition and training in the fields of safety, the environment and working conditions; provision of education programs; organization of fairs and congresses relating to industrial scale chemistry; editorial consultancy and publishing in the field of chemical engineering and manufacturing and chemical product marketing and usage. Engineering consultancy, including technical logistics consultancy for chemical industrial installations; engineering consultancy, namely industrial engineering design, project management services, and maintenance management services in the field of chemical plants, comprising inter alia development of chemical processes, development and designing of chemical plants and installations, technical feasibility studies, up scaling of chemical processes, plants and installations, counseling in respect of capacity expansion of chemical plants and installations, acceptance tests, warranty tests, services and counseling by engineers, chemists, physicists, chemical laboratory services, chemical and physical analyses, drawing up of expert reports by engineers, chemists or laboratory technicians, technical research, building construction planning, inspection of chemical plants and installations, technical counseling in respect of logistics, technical calculations, technical analyses, safety analyses, technical counseling in the fields of quality, the environment and safety, technical counseling in the field of exploitation of patent rights and technical know-how; technical counseling in the field of exploitation of licenses, technical research into issues pertaining to the protection of industrial property, assessment of production processes in order to achieve technical optimization, giving information in the areas of safety, the environment and working conditions. Licensing of technology and intellectual property; services and counseling by lawyers, legal research into issues pertaining to the protection of industrial property.

Abrégé

The present invention provides a continuous process for producing ammonium sulfate crystals, wherein said process comprises: i) feeding to a series of crystallization sections, which crystallization sections are heat integrated in series, a solution of ammonium sulfate; ii) crystallizing ammonium sulfate crystals from said solution of ammonium sulfate; iii) purging a fraction of the solution of ammonium sulfate from each of said crystallization sections; and iv) discharging ammonium sulfate crystals from each crystallization section, characterized in that: a fraction of said solution of ammonium sulfate is purged from at least one crystallization section to at least one other crystallization section; and an apparatus suitable for producing ammonium sulfate crystals.

Classes IPC  ?

• C01C 1/24 - Sulfates d'ammonium
• B01D 9/00 - Cristallisation
• C01C 1/248 - Prévention de la coalescence ou moyen pour influer sur la forme ou la dimension des cristaux
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide

Abrégé

A process for the construction of a second chemical plant, which second chemical plant is suitable for the separation of cyclohexanone from a second mixture, which second mixture comprises reaction products from the hydrogenation of phenol, said process comprising: a) providing a first chemical plant, which first chemical plant is suitable for the separation of cyclohexanone from a first mixture, which first mixture comprises reaction products from the oxidation of cyclohexane, and which first plant comprises: i) a distillation column (C) suitable for distilling overhead cyclohexane; ii) a distillation column suitable for distilling overhead cyclohexanone; iii) a cyclohexane oxidation unit (A) suitable for the oxidation of cyclohexane; and iv) a heat recovery unit (B) suitable for the recovery of heat from off-gas from the cyclohexane oxidation unit suitable for the oxidation of cyclohexane; b) disabling in said first chemical plant, said distillation column (C) suitable for distilling overhead cyclohexane, said cyclohexane oxidation unit (A) and said heat recovery unit (B), wherein the second chemical plant comprises a distillation column (F) suitable for distilling overhead cyclohexanone reused from the first chemical plant, wherein each of the first chemical plant and the second chemical plant comprise a distillation column (E) suitable for distilling overhead components having a lower boiling point than cyclohexanone; a distillation column (G) suitable for distilling overhead a mixture comprising cyclohexanol and cyclohexanone in a wt.:wt. ratio of at least 4:1; and a cyclohexanol dehydrogenation unit (H) suitable for the dehydrogenation of cyclohexanol to cyclohexanone.

Classes IPC  ?

• B01D 3/14 - Distillation fractionnée

Abrégé

(ii) the composition of the first aqueous ammonium sulfate solution that contains one or more impurities is different to the composition of the second aqueous ammonium sulfate solution that contains one or more impurities. Further provided is apparatus suitable for producing ammonium sulfate crystals.

Classes IPC  ?

• B01D 9/00 - Cristallisation
• C01C 1/24 - Sulfates d'ammonium
• C01C 1/248 - Prévention de la coalescence ou moyen pour influer sur la forme ou la dimension des cristaux
• C07D 201/16 - Séparation ou purification
• C07D 201/04 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann
• C07C 249/08 - Préparation de composés contenant des atomes d'azote, liés par des liaisons doubles à un squelette carboné d'oximes par réaction d'hydroxylamines avec des composés carbonylés

Abrégé

An industrial scale continuous process for the production and recovery of cyclohexanone from phenol and hydrogen, said process comprising: hydrogenating phenol in a phenol hydrogenation reactor; separating cyclohexanone from a hydrogenated product stream in a separation and purification section [II] comprising at least 4 distillation sections; wherein at least some of the reaction heat produced in the phenol hydrogenation reaction section [I] is applied for the production of steam; and wherein the molar ratio of cyclohexanone to phenol that is charged to said phenol hydrogenation reactor is from 0.02 to 0.10; and/or wherein the molar ratio of cyclohexanol to phenol that is charged to said phenol hydrogenation reactor is from 0.001 to 0.10.

Classes IPC  ?

• C07C 29/20 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par hydrogénation de liaisons doubles ou triples carbone-carbone dans des cycles aromatiques à six chaînons dans des cycles non condensés substitués par des groupes hydroxyle
• C07C 29/80 - SéparationPurificationStabilisationEmploi d'additifs par traitement physique par distillation
• C07C 45/00 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés
• C07C 45/82 - SéparationPurificationStabilisationEmploi d'additifs par modification de l'état physique, p. ex. par cristallisation par distillation
• C07C 49/403 - Composés saturés comportant un groupe cétone faisant partie d'un cycle d'un cycle à six chaînons
• C07C 35/08 - Composés comportant au moins un groupe hydroxyle ou O-métal lié à un atome de carbone d'un cycle autre qu'un cycle aromatique à six chaînons monocycliques contenant des cycles à six chaînons

Produits et services

(1) Chemical substances, chemical materials and chemical preparations for use in industry, namely synthetic chemical precursors, chemical intermediates for use in manufacture, in particular chemical intermediates and chemical precursors for use in manufacture of artificial and synthetic resins, raw [unprocessed] artificial resins, in particular polyamide or nylon, in particular polyamide 6 or nylon 6; precursors and monomers for the manufacture of artificial and synthetic resins, raw (unprocessed) artificial resins, in particular polyamide resins, in particular polyamide or nylon, in particular polyamide 6 or nylon 6; polyamide precursors for manufacturing artificial yarns and threads for textile use; nitrogen based chemicals and nitrogen compounds, in particular amides, oximes, amines, ammonium compounds and their derivatives; amides for use in industry; amides for use in manufacture; cyclic amides or lactams, in particular caprolactam; inorganic salts for industrial purposes, in particular ammonium salts, in particular ammonium sulfate; precursors, intermediates and byproducts of caprolactam production, in particular cyclohexanone, cyclohexanole, cyclohexanone oxime, hydroxylamine phosphate oxime, and ammonium sulfate; artificial and synthetic resins, artificial and synthetic resins for use in manufacture, raw (unprocessed) artificial resins, raw (unprocessed) artificial resins for use in industry; raw synthetic resins in the form of liquids, paste or powder; unprocessed artificial resins as raw materials in the form of granules, powders, liquids or pastes; polyamide resins, in particular polyamide or nylon, in particular polyamide 6 or nylon 6; synthetic chemical precursor products for fire extinguishing compositions, fire proofing compositions, nitrogen or phosphorous containing synthetic chemical precursors for tempering and soldering preparations, nitrogen or phosphorous containing synthetic chemical precursors for substances for preserving foodstuffs, nitrogen or phosphorous containing synthetic chemical precursors for tanning substances, nitrogen or phosphorous containing synthetic chemical precursors for industrial adhesives (1) Business consulting and business process management in the field of chemical production, financial feasibility studies, namely studies with respect to the cost-effectiveness of new chemical processes, plants and installations and extension and/or modification of existing chemical plants and installations (2) Educational instruction, industrial training, consultancy services in the fields of engineering education, chemical manufacturing installations, and related legal, regulatory and commercial subjects; training in the fields of safety, the environment and working conditions; education programs in the field of chemical manufacturing; organization of fairs and congresses on the subject of industrial scale chemistry; editorial and publishing in the field of chemical engineering and manufacturing and chemical product marketing and usage (3) Technical logistics consultancy for chemical industrial installations; Engineering consultancy, namely industrial engineering design, project management services, and maintenance management services in the field of chemical plants, comprising inter alia development of chemical processes, development and designing of chemical plants and installations, technical feasibility studies, upscaling of chemical processes, plants and installations, counselling in respect of capacity expansion of chemical plants and installations, acceptance tests, warranty tests, services and counselling by engineers, chemists, physicists and lawyers, laboratory services, chemical and physical analyses, drawing up of expert reports by engineers, chemists or laboratory technicians, technical research, building construction advice, repair work advice, building construction planning, inspection of chemical plants and installations, technical counselling in respect of logistics, technical calculations, technical analyses, safety analyses, counselling in the fields of quality, the environment and safety, exploitation of patent rights and technical know-how; exploitation of licenses, (technical and legal) research into issues pertaining to the protection of industrial property, assessment of production processes in order to achieve technical optimization, giving information in the areas of safety, the environment and working conditions (4) Licensing of technology in the field of chemical manufacturing

Produits et services

Business consulting and business process management in the field of chemical production, including cost feasibility studies in the nature of cost analysis studies with respect to the cost effectiveness of new chemical processes, plants and installations and extension and/or modification of existing chemical plants and installations [ Building construction advice, repair work advice regarding building construction ] [ Educational instruction, industrial training, consultancy services about engineering education, all in the field of chemical manufacturing installations, particularly technical, legal, regulatory, and commercial subjects; providing courses of instruction and training in the fields of safety, the environment, and working conditions; provision of education programs in the fields of chemical engineering and chemical manufacturing; organization of fairs and congresses for educational purposes, all relating to industrial scale chemistry; editorial consultancy and publishing of printed materials, all in the fields of chemical engineering, chemical manufacturing, and chemical product marketing and usage ] Engineering consultancy, [ including technical logistics consultancy for chemical industrial installations; engineering consultancy, ] namely, industrial engineering design and project management services, all in the field of chemical plants [ , comprising inter alia development of chemical processes, development and designing of chemical plants and installations, technical feasibility studies, up scaling of chemical processes, plants and installations, counseling in respect of capacity expansion of chemical plants and installations, and performing engineering acceptance tests warranty tests; engineering consultancy services, namely, counseling regarding engineering performed by engineers, chemists, and physicists; engineering-related chemical laboratory services; industrial engineering design services and project management services, namely, chemical and physical analyses, and drawing up of expert engineering reports by engineers, chemists or laboratory technicians; industrial engineering design services and project management services, namely, conducting technical engineering research; industrial engineering design services, namely, building construction planning; engineering consulting in the nature of inspection of chemical plants and installations for engineering defects; engineering consultancy in the nature of technical counseling in respect of logistics, technical calculations, technical analyses, and safety analyses; engineering consultancy in the nature of technical engineering counseling in the fields of quality, the environment, and safety; technical engineering counseling in the field of performing engineering assessments to support exploitation of patent rights and technical know-how; engineering consulting in the nature of technical engineering counseling in the field of performing engineering assessments to support exploitation of licenses; engineering consulting in the nature of technical engineering research to support the protection of industrial property; engineering consulting in the nature of performing engineering assessments of production processes in order to achieve technical optimization, and giving information in the areas of safety, the environment and working conditions ] Licensing of technology and intellectual property [ ; legal services and legal counseling by lawyers, legal research into issues pertaining to the protection of industrial property ] [ Chemical substances, ] chemical materials and chemical preparations for use in industry, [ in particular synthetic chemical precursor products; chemical substances, chemical materials and chemical preparations for use in industry, ] namely, chemical intermediates for use in manufacture; [ chemical substances, chemical materials and chemical preparations for use in industry, namely, chemical precursor products for use in manufacture of artificial and synthetic resins and raw unprocessed artificial resins, in particular polyamide, nylon, polyamide 6, and nylon 6; chemicals, namely, precursors and monomers for the manufacture of artificial and synthetic resins; raw unprocessed artificial resins, in particular polyamide resins, in particular polyamide, nylon, polyamide 6, and nylon 6; chemicals, namely, polymers for manufacturing artificial yarns and threads for textile use; nitrogen based chemicals and nitrogen compounds, in particular amides, oximes, amines, ammonium compounds and their derivatives; chemicals, namely, amides for use in industry; chemicals, namely, amides for use in manufacture; chemicals for use in industry, namely, cyclic amides and lactams, in particular ] caprolactam; inorganic salts for industrial purposes, in particular ammonium salts and ammonium sulfate [ ; chemicals, namely, precursors, intermediates and by-products of caprolactam production, in particular cyclohexanone, cyclohexanol, cyclohexanone oxime, hydroxylamine phosphate oxime, and ammonium sulfate; unprocessed artificial and synthetic resins; unprocessed artificial and synthetic resins for use in manufacture; raw unprocessed artificial resins; raw unprocessed artificial resins for use in industry; unprocessed synthetic resins as raw materials in the form of liquids, paste or powder; unprocessed artificial resins as raw materials in the form of granules, powders, liquids or pastes; unprocessed polyamide resins, in particular polyamide, nylon, polyamide 6, and nylon 6; synthetic chemical precursor products for fire extinguishing compositions; synthetic chemical precursor products for fire proofing compositions; synthetic chemical precursor products for tempering and soldering preparations; synthetic chemical precursor products for substances for preserving foodstuffs; synthetic chemical precursor products for tanning substances; synthetic chemical precursor products for industrial adhesives ] [ Semi-processed polymer resin fibers, namely, polymer resin fibers other than for use in textiles ]

Abrégé

A continuous process for producing crystalline ammonium sulfate, said process comprising a start-up operation followed by a steady-state operation, wherein the start-up operation comprises: i) in a crystallizer, evaporating solvent from an approximately saturated ammonium sulfate solution; ii) replacing evaporated solvent with further approximately proximately saturated ammonium sulfate solution; iii) introducing to the crystallizer seed crystals of ammonium sulfate; iv) continuing to evaporate solvent, until a desired degree of supersaturation is reached; and v) recovering crystalline ammonium sulfate from ammonium sulfate solution in a recovery unit, and the steady-state operation comprises: vi) continuously feeding approximately saturated ammonium sulfate solution into the crystallizer and continuously withdrawing ammonium sulfate crystals from the crystallizer, such that the total combined volume of ammonium sulfate solution and ammonium sulfate crystals within the crystallizer remains constant; and vii) recovering crystalline ammonium sulfate from ammonium sulfate solution in a recovery unit, characterized in that the degree of supersaturation in the crystallizer during the start-up operation is maintained between 1.2% and the point at which primary nucleation occurs; and apparatus suitable for carrying out the process.

Classes IPC  ?

• B01D 9/00 - Cristallisation
• C01C 1/248 - Prévention de la coalescence ou moyen pour influer sur la forme ou la dimension des cristaux
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
• C01C 1/24 - Sulfates d'ammonium

Abrégé

The invention relates to a process for preparing a crystalline ammonium sulfate product, which process comprises: a) subjecting in a crystallizer a feed solution of ammonium sulfate to crystallization to form a first slurry of ammonium sulfate crystals; b) subjecting the first slurry of ammonium sulfate crystals to a first size classification to yield a first coarse ammonium sulfate crystal fraction and a first fine ammonium sulfate crystal fraction; c) recycling at least part of the first fine ammonium sulfate crystal fraction to the feed solution of ammonium sulfate; and d) recovering a crystalline ammonium sulfate product from the first coarse ammonium sulfate crystal fraction, characterized in that: e) a second size classification is carried out on a second slurry of ammonium sulfate crystals to yield a second coarse ammonium sulfate crystal fraction and a second fine ammonium sulfate crystal fraction.

Classes IPC  ?

• C01C 1/24 - Sulfates d'ammonium
• C01C 1/248 - Prévention de la coalescence ou moyen pour influer sur la forme ou la dimension des cristaux
• B01D 9/00 - Cristallisation
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide

Abrégé

The present invention provides a process for continuously preparing a mixture of cyclohexanone and cyclohexanol comprising, a) hydrogenating phenol with gaseous hydrogen, in the presence of platinum or palladium, in a hydrogenation reactor, to produce a hydrogenation product stream comprising cyclohexanone, cyclohexanol, phenol and hydrogen; b) cooling the hydrogenation product stream to a temperature such that the fraction of phenol by mass in a first gas phase is lower than the fraction of phenol by mass in a first liquid phase; c) separating the first gas phase from the first liquid phase; d) returning at least part of the first gas phase to the hydrogenation reactor; e) heating the first liquid phase; f) purifying the first liquid phase by distillation; characterized in that heat is transferred from the hydrogenation product stream in step b) to another part of the process by means of in-process heat exchange; a mixture of cyclohexanone and cyclohexanol obtained by the process; and a chemical plant suitable for continuously preparing mixture of cyclohexanone and cyclohexanol according to the process.

Classes IPC  ?

• C07C 45/00 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés
• C07C 29/00 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons
• C07C 51/00 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides
• C07C 29/20 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par hydrogénation de liaisons doubles ou triples carbone-carbone dans des cycles aromatiques à six chaînons dans des cycles non condensés substitués par des groupes hydroxyle
• C07C 35/08 - Composés comportant au moins un groupe hydroxyle ou O-métal lié à un atome de carbone d'un cycle autre qu'un cycle aromatique à six chaînons monocycliques contenant des cycles à six chaînons
• C07C 49/603 - Composés non saturés comportant un groupe cétone faisant partie d'un cycle d'un cycle à six chaînons, p. ex. méthides de quinones
• C07D 223/10 - Atomes d'oxygène liés en position 2

Abrégé

Present application discloses an industrial scale continuous process for recovery of caprolactam and crystalline ammonium sulfate. By controlling the weight ratio of the amount of aqueous ammonium sulfate solution being recycled to the amount of Beckmann rearrangement mixture charged into the neutralization section within the range of more than 0.001 and less than 1, the productivity of the crystalline ammonium sulfate is increased, however neither the color of the crystalline ammonium sulfate nor the quality of the produced pure caprolactam is unduly influenced.

Classes IPC  ?

• C07D 223/10 - Atomes d'oxygène liés en position 2
• C07D 201/04 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann

Abrégé

A continuous process for the production of purified cyclohexanone which comprises at least the following steps: oxidation of cyclohexane; decomposition of cyclohexyl hydroperoxide; separation of an organic phase and aqueous phase; removal of cyclohexane from the organic phase; removal of alkali metal salts by washing with water; distillation and recovery of cyclohexanonewherein any residue obtained after washing contains less than 10 ppm alkali metal salts.

Classes IPC  ?

• C07C 45/33 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés par oxydation avec l'oxygène moléculaire de restes —CHx
• C07C 45/53 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés par pyrolyse, réarrangement ou décomposition d'hydroperoxydes
• C07C 45/80 - SéparationPurificationStabilisationEmploi d'additifs par traitement liquide-liquide

Abrégé

The present invention provides a continuous process for producing ammonium sulfate crystals, wherein said process comprises: (a) feeding to a first group of crystallization sections, which crystallization sections are heat integrated in series, a first aqueous ammonium sulfate solution that contains one or more impurities; (b) feeding to a second group of crystallization sections, which crystallization sections are heat integrated in series, a second aqueous ammonium sulfate solution that contains one or more impurities; (c) crystallizing ammonium sulfate crystals in each crystallization section respectively from each of said solutions of ammonium sulfate that contain one or more impurities; (d) purging a fraction of the ammonium sulfate solution that contains one or more impurities from each of said crystallization sections; and (e) discharging ammonium sulfate crystals from each crystallization section, characterized in that: (i) both the first group of crystallization sections and the second group of crystallization sections are together heat integrated in one series of crystallization sections; wherein the first group of crystallization sections operates at higher temperature than the second group of crystallization sections; and (ii) the composition of the first aqueous ammonium sulfate solution that contains one or more impurities is different to the composition of the second aqueous ammonium sulfate solution that contains one or more impurities. Further provided is apparatus suitable for producing ammonium sulfate crystal.

Classes IPC  ?

• C01C 1/24 - Sulfates d'ammonium
• C01C 1/248 - Prévention de la coalescence ou moyen pour influer sur la forme ou la dimension des cristaux
• B01D 9/00 - Cristallisation
• C07D 201/16 - Séparation ou purification
• C07C 249/14 - SéparationPurificationStabilisationEmploi d'additifs

Abrégé

The present invention provides a continuous process for the production of ammonium sulfate in combination with caprolactam, said process comprising, a) neutralizing with ammonia a mixture comprising caprolactam and sulfuric acid to form an aqueous ammonium sulfate phase and an aqueous crude caprolactam phase; b) separating the aqueous ammonium sulfate phase from the aqueous crude caprolactam phase; c) extracting into an organic solvent caprolactam present in the aqueous ammonium sulfate phase to form a caprolactam-containing organic phase and a purified aqueous ammonium sulfate phase; d) stripping organic solvent from the purified aqueous ammonium sulfate phase; and e) withdrawing organic solvent-containing gas produced in, or subsequent to, any one of steps c) and d), characterized in that f) organic solvent is recovered from said organic solvent-containing gas.

Classes IPC  ?

• C01C 1/24 - Sulfates d'ammonium
• C07D 201/16 - Séparation ou purification

Abrégé

The invention relates to a method for hydrogenating an aromatic compound. The invention in particular relates to a method for preparing cyclohexanone, cyclohexanol or a mixture thereof in a continuous way by catalytically hydrogenating phenol fed into a reactor comprising a supported hydrogenation catalyst, comprising a dopant selected from the group of alkali metal hydroxides, alkaline earth metal hydroxides, alkaline earth metal oxides, carbonates of alkali metals and carbonates of alkaline earth metals, and in which process during the hydrogenation of phenol continuously or intermittently water is fed into the reactor, the weight to weight ratio of water fed into the reactor to phenol fed into the reactor on average being 0.1 or less.

Classes IPC  ?

• C07C 45/62 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés par des réactions ne créant pas de groupe C=O par hydrogénation de liaisons doubles ou triples carbone-carbone
• C07C 29/20 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par hydrogénation de liaisons doubles ou triples carbone-carbone dans des cycles aromatiques à six chaînons dans des cycles non condensés substitués par des groupes hydroxyle

Abrégé

3/hr, being 0.05 or less. Further the invention relates to a caprolactam production plant, wherein use can be made of a process of the invention.

Classes IPC  ?

• C07D 201/16 - Séparation ou purification

Produits et services

Chemical products for industrial purposes; unprocessed artificial resins, unprocessed plastics. Paints, varnishes, lacquers; preservatives against rust and against deterioration of wood; colorants; mordants; raw natural resins. Ropes, string, nets, tents, awnings, tarpaulins, sails, sacks (not included in other classes); padding and stuffing materials (except of rubber or plastics); raw fibrous textile materials. Yarns and threads for textile use. Textiles and textile goods, not included in other classes; bed and table covers. Clothing, footwear, headgear. Lace and embroidery, ribbons and braid; buttons, hooks and eyes, pins and needles; artificial flowers. Carpets, rugs, mats and matting, linoleum and other materials for covering existing floors; wall hangings (non-textile). Business organisation consultancy in respect of capacity expansion of chemical plants and installations. Repair advices. Technical consultancy in respect of logistics (transport). Knowledge conveyance by means of workshops/courses; education. Development of chemical processes; development and design of chemical plants and installations; technical feasibility studies; services and counseling by engineers, chemists and physicists; laboratory services; chemical and physical analyses; drawing up of expert reports by engineers, chemists or laboratory technicians; technical research; advisory services on the subject of building construction; planning in the field of building construction; inspection of chemical plants and installations; technical calculations; technical analyses; consultancy in the fields of the environmental protection; technical research for the studying of production processes in order to achieve technical optimization; development of plants and installations; adapting of process technologies for plants and installations; tests to establish that the intended capacity of an installation or process, or the intended quality of the acquired product, is indeed achieved (so called acceptance tests and warranty tests); quality control in order to achieve, maintain or improve quality; technical research into issues pertaining to the protection of industrial property. Lawyer services; safety analyses; consultancy in the fields of safety; exploitation (management) of patent rights; exploitation (management) of licenses; legal research into issues pertaining to the protection of industrial property; information in the area of safety.

Abrégé

Methods for continuously preparing cyclohexanone from phenol make use of a catalyst having at least one catalytically active metal selected from platinum and palladium. The process includes enriching phenol in a distillation fraction as compared to a subsequent fraction, wherein the subsequent fraction includes phenol and side-products having a higher boiling point than phenol. Distillation is carried out in a vacuum distillation column equipped with trays in the lower part of the column. In an upper part of the column, i.e., in the part above the feed inlet, packing material is present instead of trays in at least part thereof. The packing material has a comparable or improved separating efficiency, and provides a reduction of the pressure drop by at least 30%, preferably more than 50%, as compared to the case with trays in the upper part, under otherwise similar distillation conditions.

Classes IPC  ?

• C08G 8/10 - Polymères de condensation obtenus uniquement à partir d'aldéhydes ou de cétones avec des phénols d'aldéhydes de formaldéhyde, p. ex. de formaldéhyde formé in situ avec du phénol
• B01D 3/10 - Distillation sous vide
• B01D 3/32 - Autres caractéristiques de colonnes de fractionnement
• B01J 19/32 - Éléments de remplissage en forme de grille ou d'éléments composés de plusieurs pièces pour constituer une unité ou un module dans l'appareil de transfert de chaleur ou de matière

Abrégé

The present invention relates to a method for preparing cyclohexanone from phenol in a first process, the first process being a cyclohexanone production process comprising hydrogenating phenol to form a product stream comprising cyclohexanone, phenol and side-products (RSP), including cyclohexanol and undesirable side-product; separating at least part of the product stream having a lower boiling point than cyclohexanone have been removed, into a first fraction comprising cyclohexanone and a second fraction comprising phenol, cyclohexanol and RSP, using distillation; and separating the second fraction into a third fraction, rich in cyclohexanol and comprising RSP, and a fourth fraction, rich in phenol and comprising RSP, using distillation. The invention further relates to an installation for carrying out a method of the invention.

Classes IPC  ?

• C07C 45/82 - SéparationPurificationStabilisationEmploi d'additifs par modification de l'état physique, p. ex. par cristallisation par distillation
• B01J 8/00 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés

Abrégé

The present invention relates to a method for continuously preparing cyclohexanone from phenol making use of a catalyst comprising at least one catalytically active metal selected from platinum and palladium comprising hydrogenating phenol to form a product stream comprising cyclohexanone and unreacted phenol; separating at least part of the product stream, or at least part of the product stream from which one or more components having a lower boiling point than cyclohexanone have been removed, into a first fraction comprising cyclohexanone and a second fraction comprising phenol and cyclohexanol, using distillation; separating the second fraction into a third fraction, rich in cyclohexanol, and a fourth fraction, rich in phenol, using distillation; —subjecting at least part of the fourth fraction to a further distillation step, thereby forming a fifth fraction and a sixth fraction, wherein the fifth fraction is enriched in phenol compared to the sixth fraction, and wherein the sixth fraction comprises side-products having a higher boiling point than phenol, and phenol; and which method is characterized in the additional step of continuously or intermittently separating at least part of the sixth fraction to yet a further distillation step, thereby forming a seventh fraction and an eight fraction, wherein the seventh fraction is enriched in phenol compared to the eight fraction, and wherein the eight fraction comprises side-products having a higher boiling point than phenol.

Classes IPC  ?

• C07C 45/82 - SéparationPurificationStabilisationEmploi d'additifs par modification de l'état physique, p. ex. par cristallisation par distillation
• B01J 8/00 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés

Produits et services

Chemical products for industrial purposes; unprocessed artificial resins, unprocessed plastics. Paints, varnishes, lacquers; preservatives against rust and against deterioration of wood; colorants; mordants; raw natural resins. Ropes, string, nets, tents, awnings, tarpaulins, sails, sacks (not included in other classes); padding and stuffing materials (except of rubber or plastics); raw fibrous textile materials. Yarns and threads for textile use. Textiles and textile goods, not included in other classes; bed and table covers. Clothing, footwear, headgear. Lace and embroidery, ribbons and braid; buttons, hooks and eyes, pins and needles; artificial flowers. Carpets, rugs, mats and matting, linoleum and other materials for covering existing floors; wall hangings (non-textile). Business management consultancy in respect of capacity expansion of chemical plants and installations. Repair advices. Technical consultancy relating to logistics (transport). Knowledge conveyance by means of workshops/courses; education. Development of chemical processes; development and design of chemical plants and installations; technical feasibility studies; services and counseling by engineers, chemists and physicists; laboratory services; chemical and physical analyses; drawing up of expert reports by engineers, chemists or laboratory technicians; technical research; advisory services on the subject of building construction and repair; planning in the field of building construction; inspection of chemical plants and installations; technical calculations; technical analyses; consultancy in the field of the environmental protection; technical research for the studying of production processes in order to achieve technical optimization; development of plants and installations; adapting process technologies for plants and installations; tests to establish that the intended capacity of an installation or process, or the intended quality of the acquired product, is indeed achieved (so called acceptance tests and warranty tests); quality control in order to achieve, maintain or improve quality. Lawyer services; safety analyses; consultancy in the fields of safety; exploitation of patent rights, exploitation of licenses; technical and legal research into issues pertaining to the protection of industrial property; information in the area of safety.

Produits et services

Development of chemical processes, namely, development of chemical production methods; development and design of chemical plants and installations; technical feasibility studies; services and counseling by engineers, chemists and physicists, namely, conducting engineering surveys, chemistry consultation; chemical laboratory services; [ chemical analyses; drawing up of expert technical reports by engineers, chemists or laboratory technicians in the field of production of caprolactam and intermediates therefor; technical research in the field of production of caprolactam and intermediates therefor; research on the subject of building construction and repair; research in the field of production of caprolactam and intermediates therefor; inspection of chemical plants and installations; technical calculations in the field of production of caprolactam and intermediates therefor; technical analyses of the production of caprolactam and intermediates therefor; ] research in the field of the environmental protection; technical research for the studying of production processes in order to achieve technical optimization; development of plants and installations, namely, development of plants and installations for production of caprolactam and intermediates therefor; adapting process technologies for plants and installations, namely, development of process technologies for plants and installations for production of caprolactam and intermediates therefor [ ; quality evaluation services, namely, tests to establish that the intended capacity of an installation or process, or the intended quality of the acquired product, is indeed achieved; quality control in order to achieve, maintain or improve quality ]

Produits et services

Development of chemical processes, namely, development of chemical production methods; development and design of chemical plants and installations; technical feasibility studies; services and counseling by engineers, chemists and physicists, namely, conducting engineering surveys, chemistry consultation; chemical laboratory services; [ chemical analyses; drawing up of expert technical reports by engineers, chemists or laboratory technicians in the field of production of caprolactam and intermediates therefor; technical research in the field of production of caprolactam and intermediates therefor; research on the subject of building construction and repair; research in the field of production of caprolactam and intermediates therefor; inspection of chemical plants and installations; technical calculations in the field of production of caprolactam and intermediates therefor; technical analyses of the production of caprolactam and intermediates therefor; ] research in the field of the environmental protection; technical research for the studying of production processes in order to achieve technical optimization; development of plants and installations, namely, development of plants and installations for production of caprolactam and intermediates therefor; adapting process technologies for plants and installations, namely, development of process technologies for plants and installations for production of caprolactam and intermediates therefor [ ; quality evaluation services, namely, tests to establish that the intended capacity of an installation or process, or the intended quality of the acquired product, is indeed achieved; quality control in order to achieve, maintain or improve quality ]

Abrégé

The invention relates to a continuous process for preparing large crystal products of a crystalline product in a fluid bed crystallizer, said fluid bed crystallizer comprising a crystallization vessel and means for mechanically impacting of crystals; and connected to the crystallization vessel (i) a feed line; (ii) an external circulation circuit comprising means for determining properties of the slurry in the external circulation circuit and a heat exchanger; and (iii) a product withdrawal line, wherein—for any specific crystalline product and at any flow rate chosen in the external circulation circuit—the weight percentage of crystals of the crystalline product in the slurry in the external circulation circuit, ECCWPC, is controlled by said means for determining properties of the slurry within a specified and predetermined narrow range having a maximum and minimum value not more apart than at most 25% by weight and falling within the range of from 1 to 50% by weight. Preferably, the crystalline product is ammonium sulphate, and the ECCWPC is controlled within a range of from 3 to 20% by weight, preferably of from 5 to 15% by weight, more preferably of from 8 to 12% by weight. The product obtained may be further subjected to size classification by screening.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau

Produits et services

Development of chemical processes; development and design of chemical plants and installations; technical feasibility studies; upscaling of chemical processes, plants and installations, namely, consulting about development and design of chemical processes, plants and installations; consulting services in the field of design for capacity expansion of chemical plants and installations; acceptance tests and warranty tests of chemical processes, plants and installations, namely, testing to verify if chemical processes, plants and installations meet certain chemical processing and production requirements; consulting in the field of engineering; [ chemist services; chemistry consultation; consultation in the field of physics; medical laboratory services; chemical analysis; physical analysis of chemical processes, plants and installations; drawing up of expert reports by engineers, chemists or laboratory technicians; technical chemical research; planning in the field of building construction, namely, planning of buildings and chemical plants and installations being buildings; inspection of chemical plants and installations; technology consultation in the field of logistics; consultation in the fields of quality control, environmental science, and product safety testing; ] technical and legal research into issues pertaining to the protection of industrial property. [ providing information in the fields of environmental science and product safety testing; editing of written texts ]

Produits et services

Financial feasibility studies. Tuition; courses; training, education programmes; organization of congresses; organization of fairs for cultural or educational purposes; tuition and training in the fields of safety, the environment and working conditions; services rendered by a publishing company. Development of chemical processes; development and design of chemical plants and installations; technical feasibility studies; upscaling of chemical processes, plants and installations; counselling in respect of capacity expansion of chemical plants and installations; acceptance tests; warranty tests; services and counselling by engineers, chemists, physicists and lawyers; laboratory services; chemical and physical analyses; drawing up of expert reports by engineers, chemists or laboratory technicians; technical research; advisory services on the subject of building construction and repair; planning in the field of building construction; inspection of chemical plants and installations; technical consultancy in respect of logistics; technical calculations; technical analyses; safety analyses; consultancy in the fields of quality, the environment and safety; exploitation of patent rights and technical know-how; exploitation of licenses; technical and legal research into issues pertaining to the protection of industrial property; research of production processes in order to achieve technical optimization; information in the areas of safety, the environment and working conditions; editing of written texts.

Produits et services

Financial feasibility studies, namely studies with respect to the cost-effectiveness of new chemical processes, plants and installations and extension and/or modification of existing chemical plants and installations. Tuition; courses; training; education programmes; organization of fairs and congresses; tuition and training in the fields of safety, the environment and working conditions; editing and publishing. Development of chemical processes; development and designing of chemical plants and installations; technical feasibility studies; upscaling of chemical processes, plants and installations; counselling in respect of capacity expansion of chemical plants and installations; acceptance tests; warranty tests; services and counselling by engineers, chemists, physicists and lawyers; laboratory services; chemical and physical analyses; drawing up of expert reports by engineers, chemists or laboratory technicians; technical research; building construction advice; repair work advice; building construction planning; inspection of chemical plants and installations; technical counselling in respect of logistics; technical calculations; technical analyses; safety analyses; counselling in the fields of quality, the environment and safety; exploitation of patent rights and technical know-how; exploitation of licenses; (technical and legal) research into issues pertaining to the protection of industrial property; assessment of production processes in order to achieve technical optimization; giving information in the areas of safety, the environment and working conditions.

Produits et services

(1) Caprolactam; nylon; recycled caprolactam.