Biocatalytic processes for producing a product wherein an aqueous stream comprising at least one fermentable substrate and/or a gaseous stream comprising at least one of CO2/H2, H2, methane, and/or CO are povided to a fermentation zone comprising at least one organism capable of metabolizing a substance present in one of the streams. The fermentation may operate at conditions to mixotrophically metabolize at least one gaseous substrate and at least one substrate present in the aqueous stream.
This document describes biochemical pathways for producing 4-hydroxybutyrate, 4-aminobutyrate, putrescine or 1,4-butanediol by forming one or two terminal functional groups, comprised of amine or hydroxyl group, in a C5 backbone substrate such as 2-oxoglutarate or L-glutamate.
A polyester comprising 0.1 to 7 weight percent, based on the total weight of the polyester, of at least one monomeric component of formula (I): wherein R1 is independently chosen from H, methyl, and ethyl, R2 and R3 are independently chosen from -COOH, -COOMe, -COOEt, -COOIPr, -COOnPr, - CH2OH, -CI, -Br, and NH2, and J and K are independently chosen from 1, 2, 3, 4, 5, 6, 7, or 8; at least one dicarboxylic acid component other than the monomeric component of formula (I); and at least one diol component.
An uncoated woven fabric of yarn formed from synthetic fibers woven in the warp direction and weft direction to form a top surface and a bottom surface wherein at least a portion of the yarn on the top surface or at least a portion of the yarn on the bottom surface has fibers with a permanently modified cross-section and that are fused together is provided. Methods for production and use of this fabric in application to products such as automobile airbags, sailcloths, inflatable slides, temporary shelters, tents, ducts, coverings and printed media are also provided.
This document describes materials and methods for, for example, producing 6-hydroxyhexanoic acid using a β-ketothiolase or synthase and an alcohol O-acetyltransferase to form a 6-acetyloxy-3-oxohexanoyl-CoA intermediate. This document describes biochemical pathways for producing 6-hydroxyhexanoic acid using a β-ketothiolase or synthase and an alcohol O-acetyltransferase to form a 6-acetyloxy-3-oxohexanoyl-CoA intermediate. 6-hydroxyhexanoic acid can be enzymatically converted to adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine or 1,6-hexanediol. This document also describes recombinant hosts producing 6-hydroxyhexanoic acid as well as adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine and 1,6-hexanediol.
C07H 19/207 - Purine radicals with the saccharide radical being esterified by phosphoric or polyphosphoric acids the phosphoric or polyphosphoric acids being esterified by a further hydroxylic compound, e.g. flavine-adenine dinucleotide or nicotinamide-adenine dinucleotide
6.
FIBERFILL HAVING COOLING EFFECT AND ARTICLES MADE THEREOF
A fiberfill that provides a cooling effect, comprising a synthetic filament at least partially coated with a polymeric treatment, wherein the polymeric treatment comprises at least one hydrophilic finish disposed on the synthetic filament.
D06M 15/643 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
D06B 3/10 - Passing of textile materials through liquids, gases, or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
The present disclosure provides novel polypeptides with improved 3-buten-2- ol dehydratase activity, polypeptides with improved linalool dehydratase activity, and polypeptides with catalytic activity in the conversion of 3-methyl-3-buten-2-ol to isoprene. Methods of making and using the polypeptides are also provided.
C07K 14/435 - Peptides having more than 20 amino acidsGastrinsSomatostatinsMelanotropinsDerivatives thereof from animalsPeptides having more than 20 amino acidsGastrinsSomatostatinsMelanotropinsDerivatives thereof from humans
The present invention relates to a gas-driven rotary filter comprising: a) a housing; b) a filter drum positioned within the housing and rotatable about its axis in a first direction within the housing; and c) means to provide a flow of gas within a gas space between the circumference of the filter drum and the housing in a second direction, characterised in that the gas-driven rotary filter is adapted to inhibit migration of solvent vapour through a gas space between an end of the filter drum and the housing. The invention also relates to a method for separating a solid from a solvent in the gas-driven rotary filter, and a process for manufacturing an aromatic dicarboxylic acid incorporating this method.
This document describes materials and methods for producing 7-hydroxyheptanoic acid using a β-ketothiolase or a synthase and an alcohol O-acetyltransferase to form a 7-acetyloxy-3-oxoheptanoyl-CoA intermediate. This document describes biochemical pathways for producing 7-hydroxyheptanoic acid using a β-ketothiolase or a synthase and an alcohol O-acetyltransferase to form a 7-acetyloxy-3-oxoheptanoyl-CoA intermediate. 7-hydroxyheptanoic acid can be enzymatically converted to pimelic acid, 7-aminoheptanoic acid, heptamethylenediamine or 1,7 heptanediol. This document also describes recombinant hosts producing 7-hydroxyheptanoic acid as well as pimelic acid, 7-aminoheptanoic acid, heptamethylenediamine and 1,7 heptanediol.
This document describes biochemical pathways for producing 7-hydroxyheptanoic acid using a polypeptide having monooxygenase activity to form a 8-hydroxynonanoate intermediate, which can be converted to 7-hydroxyheptanoate using a polypeptide having monooxygenase activity, a polypeptide having secondary alcohol dehydrogenase activity, and a polypeptide having esterase activity. 7-hydroxyheptanoic acid can be enzymatically converted to pimelic acid, 7-aminoheptanoic acid, heptamethylenediamine or 1,7 heptanediol. This document also describes recombinant hosts producing 7-hydroxyheptanoic acid as well as pimelic acid, 7-aminoheptanoic acid, heptamethylenediamine and 1,7 heptanediol.
C12P 7/64 - FatsFatty oilsEster-type waxesHigher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl groupOxidised oils or fats
C12P 13/00 - Preparation of nitrogen-containing organic compounds
This document describes biochemical pathways for producing 6-hydroxyhexanoic acid using a monooxygenase to form a 7-hydroxyoctanoate intermediate, which can be converted to 6-hydroxyhexanoate using a polypeptide having monooxygenase, secondary alcohol dehydrogenase, or esterase activity. 6-hydroxyhexanoic acid can be enzymatically converted to adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine or 1,6-hexanediol. This document also describes recombinant hosts producing 6-hydroxyhexanoic acid as well as adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine and 1,6-hexanediol.
C12P 7/64 - FatsFatty oilsEster-type waxesHigher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl groupOxidised oils or fats
This document describes biochemical pathways for producing 1,3-butanediol using a polypetide having β-ketothiolase activity to form a 3-oxo-5-hydroxypentanoyl-CoA intermediate that can be enzymatically converted to 1,3-butanediol, as well as recombinant hosts producing 1,3-butanediol.
C12P 19/32 - Nucleotides having a condensed ring system containing a six-membered ring having two nitrogen atoms in the same-ring, e.g. purine nucleotides, nicotineamide-adenine dinucleotide
This document describes biochemical pathways for producing 6-hydroxyhexanoic acid using a polypeptide having ß-ketothiolase activity to form a 3-oxo-6-hydroxyhexanoyl-CoA intermediate. 6-hydroxyhexanoic acid can be enzymatically converted to adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine or 1,6-hexanediol. This document also describes recombinant hosts producing 6-hydroxyhexanoic acid as well as adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine and 1,6-hexanediol.
The present invention provides a process for the production of a purified aromatic dicarboxylic acid comprising the steps of: i) catalytically oxidizing a hydrocarbon precursor in an organic solvent to form a product stream and a vent gas in an oxidation stage; ii) separating the vent gas from the oxidation stage into an organic solvent-rich liquid stream and a water-rich vapour stream in a distillation stage; iii) condensing the water-rich vapour stream from the distillation stage into a condensate stream and a vapour stream in a first condensation stage by transferring heat from the water-rich vapour stream to a first coolant liquid flowing in a coolant system; and iv) forming a slurry of crude aromatic dicarboxylic acid crystals and an overhead vapour from the product stream from the oxidation stage in a crystallisation stage; and v) purifying the crude aromatic dicarboxylic acid crystals to yield the purified aromatic dicarboxylic acid, characterised in that the process further comprises the steps of: vi) condensing at least a portion of the overhead vapour from the crystallisation stage by transferring heat from the overhead vapour to a second coolant liquid flowing in the coolant system, wherein at least a portion of the second coolant liquid is derived from the first coolant liquid, wherein the condensing of at least a portion of the overhead vapour from the crystallisation stage is conducted in a second condensation stage comprising a first condenser; and vii) measuring the temperature of the second coolant liquid in the coolant system downstream of the first condenser and/or measuring the flow rate of the second coolant liquid in the coolant system; wherein the coolant system is configured to direct at least a portion of the second coolant liquid from a position in the coolant system downstream of the first condenser to a position in the coolant system upstream of the first condenser via a feedback system configured to cool the second coolant liquid if the measured temperature of the second coolant liquid downstream of the first condenser is greater than or equal to a first pre-set temperature and/or the measured flow rate of the second coolant liquid is less than or equal to a pre-set flow rate. The present invention further provides an apparatus for carrying out the process.
The present invention provides a method for the production of purified terephthalic acid crystals in an integrated terephthalic acid – polyester plant comprising the steps of: i) providing a stream of purified terephthalic acid crystals in an aqueous medium; ii) separating the purified terephthalic acid crystals from the aqueous medium in a filtration zone; and iii) washing the purified terephthalic acid crystals with an aqueous wash liquid, characterised in that at least a portion of the aqueous wash liquid is derived from an aqueous condensate liquor from the polyester plant.
C07C 51/265 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
C07C 51/43 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation
High strength or load bearing nylon fiber with break tenacity greater than 7.5 g/den and/or a tenacity at 10% elongation of greater than 4.0g/den as well as yarns, fabrics and articles of manufacture thereof and methods for their production are provided.
The present invention provides a method for recovering a derivative of an organic solvent from a first process stream comprising the organic solvent, water, and the derivative of the organic solvent in a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in the organic solvent in an oxidation reactor, comprising the steps of: i) feeding the first process stream to a stripping device comprising a stripping column and sump; ii) removing a purified organic solvent stream from the sump; and iii) transferring an overhead stream from the stripping column to a condenser, wherein the mass concentration of the derivative of the organic solvent in the purified organic solvent stream removed from the sump in step ii) is lower than the mass concentration of the derivative of the organic solvent in the first process stream fed to the stripping device in step i), and, optionally, wherein the mass concentration of the derivative of the organic solvent in the overhead stream transferred to the condenser in step iii)is greater than the mass concentration of the derivative of the organic solvent in the first process stream fed to the stripping device in step i). The present invention further provides apparatus for carrying out the method, and a process for the production of an aromatic dicarboxylic acid incorporating the method.
The present invention provides a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in an organic solvent, wherein off-gas generated by the oxidation reaction is vented to the atmosphere after treatment to remove HBr and/or Br2, wherein said process comprises scrubbing in a scrubbing column a gas stream derived from off-gas generated by said oxidation reaction and comprising HBr and/or Br2, characterised in that: (i) the gas stream is irrigated with liquid phase water and a wash stream comprising alkali metal ions within said scrubbing column; (ii) the scrubbed gas stream is withdrawn from a vent located in an upper region of the scrubbing column; and (iii)a stream comprising water, said alkali metal ions and bromide ions is withdrawn from an effluent outlet located in a lower region of the scrubbing column. The present invention further provides a scrubbing column for carrying out the process.
The present invention provides a method for raising steam in a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in an organic solvent, comprising the steps of: i) heating a crude aromatic dicarboxylic acid slurry to form a crude aromatic dicarboxylic acid solution; ii) transferring the crude aromatic dicarboxylic acid solution to a hydrogenation reactor; iii) transferring a purified aromatic dicarboxylic acid solution from the hydrogenation reactor to a series of one or more crystallisers; and iv) transferring heat from a crystalliser vent stream from the series of one or more crystallisers to a water stream in a steam raiser to generate steam. The present invention further provides an apparatus for carrying out the method, and a process for the production of an aromatic dicarboxylic acid incorporating the method.
C07C 51/265 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
C07C 51/43 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation
C07C 51/487 - SeparationPurificationStabilisationUse of additives by treatment giving rise to chemical modification
The present invention provides method for removing residues from a first process stream comprising an organic solvent, water, a derivative of the organic solvent and the residues, comprising the steps of: i) feeding the first process stream to a solvent stripper comprising a still pot and a stripper column; ii) removing a vapour stream comprising the organic solvent, water and the derivative of the organic solvent from the stripper column; and iii) removing a residue stream from the still pot; characterised in that: the still pot and the stripper column form an integrated unit and the stripper column comprises a plurality of sieve trays. The present invention further provides an apparatus for carrying out the method, and processes for the production of a purified aromatic dicarboxylic acid incorporating the method.
C07C 51/16 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation
C07C 51/44 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation by distillation
C07C 51/46 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation by distillation by azeotropic distillation
C07C 51/265 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
The present invention provides a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in an organic solvent, wherein said process comprises: (a) separating off-gas generated by said oxidation reaction into an organic solvent-rich liquid stream and a water-rich vapour stream, wherein the water-rich vapour stream comprises organic compounds and non-condensable gases, and wherein said separating is performed in a pressurised distillation stage comprising a first pressurised distillation column and a second pressurised distillation column, and (b) condensing said water-rich vapour stream exiting the pressurised distillation stage into a condensate stream and an overhead gas stream in a condensing stage, characterised in that a first water-rich vapour stream is withdrawn from said first pressurised distillation column and passed to said second pressurised distillation column and a first organic solvent-rich liquid stream is withdrawn from the first pressurised distillation column and returned to the oxidation reaction, wherein said process further comprises the step of monitoring the oxidation reaction by analysing the composition of said first water-rich vapour stream.
C07C 51/265 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
The present invention provides a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in an organic solvent, comprising the steps of: i) separating a vent gas from an oxidation stage into an organic solvent-rich liquid stream and a water-rich vapour stream in a distillation stage; and ii) separating an aqueous purification mother liquor comprising organic compounds from purified aromatic dicarboxylic acid crystals in a separation stage, characterised in that the process further comprises the steps of: iii) transferring the aqueous purification mother liquor from the separation stage to an extraction stage; iv) extracting said organic compounds from the aqueous purification mother liquor by contacting the aqueous purification mother liquor at a temperature of at least 90ºC with an organic liquid in the extraction stage to form an aqueous phase and an organic phase, wherein the concentration of said organic compounds in the aqueous phase is lower than the concentration of said organic compounds in the aqueous purification mother liquor; and v) transferring the aqueous phase to said distillation stage. The present invention further provides an apparatus for carrying out the process.
C07C 51/265 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
C07C 51/44 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation by distillation
C07C 51/48 - SeparationPurificationStabilisationUse of additives by liquid-liquid treatment
The present disclosure relates to methods for separating and purifying a long chain diacid from other long chain diacids, monocarboxylic acids, hydroxyl acids or alkanes by simulated or actual moving bed chromatography.
C07C 51/47 - SeparationPurificationStabilisationUse of additives by solid-liquid treatmentSeparationPurificationStabilisationUse of additives by chemisorption
B01D 15/18 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns
24.
SYNTHETIC FIBERS WITH ENHANCED STAIN RESISTANCE AND METHODS OF MAKING THE SAME
Synthetic fibers with enhanced stain resistance, yarns and carpets prepared from these fibers and compounds and methods for their production are provided.
The present invention provides processes and apparatuses for recovering an aromatic monocarboxylic acid from a residue stream in which a first solid extraction is followed by a second extraction.
C07C 51/265 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
C07C 51/47 - SeparationPurificationStabilisationUse of additives by solid-liquid treatmentSeparationPurificationStabilisationUse of additives by chemisorption
C07C 51/48 - SeparationPurificationStabilisationUse of additives by liquid-liquid treatment
This document describes biochemical pathways for producing 2(E)-heptenedioyl-CoA methyl ester from precursors such as 2-oxo-glutarate, acetyl-CoA, or succinyl-CoA using one or more of a fatty acid O-methyltransferase, a thioesterase, a CoA-transferase, a CoA ligase, as well as recombinant hosts expressing one or more of such enzymes. 2(E)-heptenedioyl-CoA methyl ester can be enzymatically converted to pimeloyl-CoA using a trans-2-enoyl-CoA reductase, and a methylesterase. Pimeloyl-CoA can be enzymatically converted to pimelic acid, 7-aminoheptanoate, 7-hydroxyheptanoate, heptamethylenediamine, or 1,7-heptanediol.
This document describes biochemical pathways for producing 2,3-dehydroadipyl-CoA methyl ester from precursors such as 2-oxoglutarate using one or more of a fatty acid O-methyltransferase, a thioesterase, a CoA-transferase and a CoA ligase, as well as recombinant hosts expressing one or more of such enzymes. 2,3-dehydroadipyl-CoA methyl ester can be enzymatically converted to adipyl-CoA using a trans-2-enoyl-CoA reductase, and a methylesterase, which in turn can be enzymatically converted to adipic acid, 6-aminohexanoate, 6-hydroxyhexanoate, caprolactam, hexamethylenediamine, or 1,6-hexanediol.
This document describes biochemical pathways for producing 7-hydroxyheptanoate methyl ester and heptanoic acid heptyl ester using one or more of a fatty acid O-methyltransferase, an alcohol O-acetyltransferase, and a monooxygenase, as well as recombinant hosts expressing one or more of such exogenous enzymes. 7-hydroxyheptanoate methyl esters and heptanoic acid heptyl esters can be enzymatically converted to pimelic acid, 7-aminoheptanoate, 7-hydroxyheptanoate, heptamethylenediamine, or 1,7-heptanediol.
This document describes biochemical pathways for producing glutaric acid, 5 aminopentanoic acid, 5-hydroxypentanoic acid or 1,5-pentanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C5 backbone substrate such as cadaverine or 5-aminopentanamide.
This document describes biochemical pathways for producing glutaric acid, 5-aminopentanoic acid, 5-hydroxypentanoic acid, cadaverine or 1,5-pentanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C5 backbone substrate such as 2-oxoglutarate, the substrate being 2-oxo-adipate.
This document describes biochemical pathways for producing 2,4-pentadienoyl-CoA by forming one or two terminal functional groups, comprised of carboxyl or hydroxyl group, in a C5 backbone substrate such as glutaryl-CoA, glutaryl-[acp] or glutarate methyl ester. 2,4-pentadienoyl-CoA can be enzymatically converted to 1,3-butadiene.
This document describes biochemical pathways for producing 6- hydroxyhexanoate methyl ester and hexanoic acid hexyl ester using one or more of a fatty acid O-methyltransferase, an alcohol O-acetyltransferase and a monooxygenase, as well as recombinant hosts expressing one or more of such enzymes. 6-hydroxyhexanoate methyl esters and hexanoic acid hexyl ester can be enzymatically converted to adipic acid, adipate semialdehyde, 6-aminohexanoate, 6-hydroxyhexanoate, hexamethylenediamine, and 1,6-hexanediol.
This document describes biochemical pathways for producing glutaric acid, 5-aminopentanoic acid, 5-hydroxypentanoic acid, cadaverine or 1,5-pentanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C5 backbone substrate such as malonyl-CoA or malonyl-[acp].
This document describes biochemical pathways for producing 5-hydroxypentanoate methyl ester and pentanoic acid pentyl ester using one or more of a fatty acid O-methyltransferase, an alcohol O-acetyltransferase, and a monooxygenase, as well as recombinant hosts expressing one or more of such exogenous enzymes. 5-hydroxypentanoate methyl esters and pentanoic acid pentyl esters can be enzymatically converted to glutaric acid, 5-aminopentanoate, 5-hydroxypentanoate, cadaverine, or 1,5-pentanediol.
Thermoplastic fibers with an additive that yields modified and/or reactive groups on the surface of the fiber are provided. Also provided are methods for production and articles of manufacture containing these thermoplastic fibers. In addition, methods and products with enhanced soil resistance are provided.
This document describes biochemical pathways for producing adipyl-[acp] and either hexanoic acid or acetic acid from a long chain acyl-[acp] such as dodecanoyl-[acp] or octanoyl-[acp] using a polypeptide having pimeloyl-[acp] synthase activity and biochemical pathways for converting adipyl-[acp] and/or hexanoic acid to one of more of adipic acid, 6-aminohexanoic acid, 6-hydroxyhexanoic acid, hexamethylenediamine, caprolactam, and 1,6-hexanediol.
This document describes biochemical pathways for producing 2- aminopimelate from 2,6-diaminopimelate, and methods for converting 2- aminopimelate to one or more of adipic acid, adipate semialdehyde, caprolactam, 6- aminohexanoic acid, 6-hexanoic acid, hexamethylenediamine, or 1,6-hexanediol by decarboxylating 2-aminopimelate into a six carbon chain aliphatic backbone and enzymatically forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in the backbone.
Disclosed is a method for hydrogenating a dinitrile to form a diamine in the presence of liquid or supercritical ammonia, in particular the preparation of hexamethylenediamine (HMD) from adiponitrile (ADN) and of 2-methylpentamethylenediamine (MPMD) from methylglutaronitrile (MGN). Heat generated in the hydrogenation reaction is used to supply heat for distilling ammonia from a liquid comprising ammonia and diamine.
C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
C07B 43/04 - Formation or introduction of functional groups containing nitrogen of amino groups
The disclosed process provides an improved process for manufacturing and recovering butanediol. More particularly, the disclosed process relates to an improved process for manufacturing and recovering butanediol from feedstock comprising butynediol in a reaction zone at reaction conditions, comprising the steps of reacting butynediol in the liquid phase and hydrogen in a reaction zone containing hydrogenation catalyst, recovering liquid phase product from the reaction zone, passing the recovered liquid phase product into a first liquid pressure let down vessel maintained at specific conditions, recovering first and second streams from the first liquid pressure let down vessel as liquid bottoms and overhead vent gas, respectively, passing the first stream liquid bottoms recovered to a second liquid pressure let down vessel maintained at specific conditions, and the second stream vent gas recovered to a vent gas cooler maintained at specific conditions, passing the gas from the vent gas cooler to a hydrogen recovery zone comprising a membrane filter, whereby the permeate comprises high purity hydrogen gas and the retentate comprises contaminants, recycling the permeate to the reaction zone, and recovering first and second streams from the second liquid pressure let down vessel as liquid bottoms comprising butanediol and overhead vent gas, respectively.
C07C 29/17 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds
C01B 3/50 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01J 19/24 - Stationary reactors without moving elements inside
A rotary filter comprising (i) a housing comprising a first wash zone comprising a first wash fluid input zone, a final wash zone comprising a final wash fluid input zone, and one or more intervening wash zone(s) each comprising a wash fluid input zone; (ii) a control head comprising a first wash fluid output zone, a final wash fluid output zone, and one or more intervening wash fluid output zone(s); and (iii) a filter drum positioned within the housing and rotatable about its axis within the housing; and (iv) means to transfer wash fluid in counter-current flow, relative to the direction of rotation of the filter drum, from a wash output zone to a wash input zone of a preceding wash zone; characterised in that the rotary filter is configured to pass wash fluid via the filter drum from a wash fluid input zone (IZn) to the wash fluid output zone (OZn) of the same wash zone (n) and additionally to the wash fluid output zone of a preceding wash zone.
B01D 33/00 - Filters with filtering elements which move during the filtering operation
C07C 51/47 - SeparationPurificationStabilisationUse of additives by solid-liquid treatmentSeparationPurificationStabilisationUse of additives by chemisorption
Disclosed are methods for purifying aqueous waste streams from a pure terephthalic acid (PTA) manufacturing plant and recycling of the purified water back into the PTA plant. Specifically, provided is a process for treating an aqueous eluent stream generated by a pure plant mother liquor solvent extraction process by raising the pH of the aqueous stream with an alkali, filtering the adjusted stream; and contacting the filtered stream with a reverse osmosis unit to form a demineralized water stream. Raising the pH of the aqueous stream with an alkali converts the soluble metal salts to insoluble compounds, while also converting both soluble and insoluble organic acids to the corresponding acid salts. The filter can be a standard ultrafiltration membrane, which removes the insoluble metal compounds and other remaining insoluble components. The reverse osmosis unit removes organic acid salts, including sodium salts, while balancing the pH.
Disclose are methods for minimizing the recycle of para-toluic acid within a terephthalic acid purification plant. Specifically, the disclosed methods remove a portion of the p-toluic acid from the pure plant flash condensate and recycles a portion of this cleaned stream back to the crude TA feed stream before the pure plant process. This process allows the 4-CBA in the crude TA to be increased from below 3000 ppm to between 3000 ppm to 4000 ppm without increasing p-toluic acid in the PTA, resulting in an about 7% increase in the pure plant mother liquor flows.
C07C 51/02 - Preparation of carboxylic acids or their salts, halides, or anhydrides from salts of carboxylic acids
C07C 51/347 - Preparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups
C07C 65/32 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings and containing any of the groups OH, O-metal, —CHO, keto, ether, groups, groups, or groups containing keto groups
C07C 65/34 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings and containing any of the groups OH, O-metal, —CHO, keto, ether, groups, groups, or groups containing keto groups polycyclic
43.
WATER REPELLENT, SOIL RESISTANT, FLUORINE-FREE COMPOSITIONS
The present invention pertains to fluorine-free compositions rendering textile articles, such as carpets and other textile floor coverings made from synthetic fibres or natural fibres which are water repellent, soil resistant and stain resistant. The invention pertains additionally to a method for treating textile articles and treated textile articles especially carpets are water repellent, soil resistant and stain resistant.
D06M 11/00 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereofSuch treatment combined with mechanical treatment, e.g. mercerising
D06M 15/263 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acidsSalts or esters thereof
Polyamide resins with mineral additives which accelerate crystallization without adversely affecting mechanical properties of articles molded therefrom, methods for their production and articles of manufacture prepared from these polyamide resins are provided.
C08L 77/00 - Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chainCompositions of derivatives of such polymers
C08L 77/06 - Polyamides derived from polyamines and polycarboxylic acids
45.
FABRIC FOR MAKING AIRBAGS AND METHOD OF MAKING SAME
A woven fabric comprising a base yarn and a secondary yarn, wherein the secondary yarn is interwoven into the base yarn, and wherein the secondary yarn has a melting point that is lower than the melting point of base yarn. Also disclosed is a method of making a base yarn and a secondary yarn, wherein the secondary yarn is interwoven into the base yarn, and wherein the secondary yarn has a melting point that is lower than the melting point of base yarn.
D04H 1/46 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
Disclosed are counter-current reaction columns with improved pressure drop and temperature profiling. Such improvements result in a higher IV prepolymer. The improvements over prior art designs include reducing the length to diameter ratio of the cylindrical section of the column while maintaining the same active volume, and / or including an external heat exchanger. Further, inert gas flowrate and prepolymer residence time is increased.
The present invention relates to a process for manufacturing copolyether ester polyol having a low oligomeric cyclic ether content, for example, less than about 2.0% by weight, from feedstock comprising polytetramethylene ether glycol having a low number average molecular weight, for example, 350 g/mol or less, and a high oligomeric cyclic ether content, for example, about 4.0% by weight or greater.
C08G 65/30 - Post-polymerisation treatment, e.g. recovery, purification, drying
C08G 65/332 - Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides or esters thereof
48.
PROCESS FOR PRODUCING PARTIALLY BALANCED ACID SOLUTION WITH VESSEL HAVING A DISPERSER HEAD FOR NYLON SALT PRODUCTION
A continuous process for producing a nylon salt solution prepared using a liquid partially balanced adipic solution enriched in dicarboxylic acid, and in particular adipic acid. The liquid feed is prepared by metering dicarboxylic acid powder, based on weight, from a loss-in-weight feeder to a feeding conduit that transfers the dicarboxylic acid powder into a vessel comprising a disperser head; feeding a first feed stream of diamine to the vessel to form a dispersion comprising between 32 wt.% and 46 wt.% dicarboxylic acid, between 11 wt.% and 15 wt.% diamine, and between 39 wt.% and 57 wt.% water, and heating the dispersion at temperature between 50C and 60C to form a partially balanced adipic solution. A nylon salt solution is prepared from the liquid partially balanced adipic solution and continuously withdrawn into a storage tank. The nylon salt solution has a uniform pH and is suitable for producing nylon polymers.
C07C 209/68 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
The present invention relates to an improved process for manufacturing polytetramethylene ether glycol. The process involves controlling the number average molecular weight of the diacetate of polytetramethylene ether glycol intermediate produced by tetrahydrofuran polymerization before methanolysis thereof to desired polytetramethylene ether glycol product.
C08G 65/26 - Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
C08G 65/30 - Post-polymerisation treatment, e.g. recovery, purification, drying
C08G 65/331 - Polymers modified by chemical after-treatment with organic compounds containing oxygen
The present invention relates to an improved process for addition of hydrogen cyanide across olefins and, in particular, to the use of a specific aluminum oxide to catalyze the reaction. The aluminum oxide catalyst must have total alkali metal and/or alkaline earth metal content, measured in the form of alkali metal oxide and/or alkaline earth metal oxide, of less than 3,000 ppm by weight.
C07C 253/10 - Preparation of carboxylic acid nitriles by addition of hydrogen cyanide or salts thereof to unsaturated compounds to compounds containing carbon-to-carbon double bonds
The invention relates to a method for producing 2-methyl-1,3-dioxolane from a polyester solid state polymerization system. The method comprises using an acid catalyst to effectuate the conversion of acetaldehyde present within the system to 2-methyl-1,3-dioxolane, which can be readily removed in the ethylene glycol stream.
C07D 317/12 - Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms
B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
A continuous process for the manufacture of a polyamide, the process comprising the steps of: (i)flowing a stream A comprising a moltendicarboxylic acid, or a molten dicarboxylic acid-rich mixture comprising a dicarboxylic acid and a diamine, through a first stage and at least one more reaction stage of a vertical multistage reactor, wherein the first stage is at the top of the reactor; (ii)counter-currently flowing a stream B comprising a diamine as either a vapour or a diamine-rich liquid through at least one of the stages below the first reaction stage of said vertical multistage reactor; (iii)accumulating a liquid phase material P comprising polyamide at and/or below the final stage of said reactor; wherein said reactor is equipped with internal features suitable for effecting contact between counter-currently flowing streams A and B; and wherein the process further comprises controlling the viscosity of said liquid phase material P by directly controlling the chemical equilibrium of the polyamidation reactionor by controlling stream B so that the amounts of diamine and dicarboxylic acid introduced intothe reactorduring the processare stoichiometrically imbalanced. The invention further provides a vertical multistage reactor configured to implement said process.
A continuous process for the manufacture of a polyamide, the process comprising the steps of: (i) flowing a stream A comprising a molten dicarboxylic acid, or a molten dicarboxylic acid-rich mixture comprising a dicarboxylic acid and a diamine, through a first stage and at least one more reaction stage of a vertical multistage reactor, wherein the first stage is at the top of the reactor; (ii) counter-currently flowing a stream B comprising a diamine as either a vapour or a diamine-rich liquid through at least one of the stages below the first reaction stage of said vertical multistage reactor; (iii) accumulating a liquid phase material P comprising polyamide at and/or below the final stage of said reactor; wherein said reactor is equipped with internal features suitable for effecting contact between counter-currently flowing streams A and B; and wherein said process further comprises the step of agitating said liquid phase material P by injecting a gaseous stream C comprising steam, or at least one inert gas, or a mixture of steam and at least one inert gas into the reactor at or below the final stage of the reactor. The invention further provides a vertical multistage reactor configured to implement said process.
The invention relates to an integrated system for the preparation of purified terephthalic acid (PTA) and the use of the PTA for the production of poly(ethylene terephthalate) (PET). Advantageously, the integrated system design described herein can minimize the possibility of contamination of the PTA production operation with reactant, catalysts, or impurities from the PET production operation. Methods of using the integrated system for the production of PET are also described.
C07C 277/02 - Preparation of guanidine or its derivatives, i.e. compounds containing the group the singly-bound nitrogen atoms not being part of nitro or nitroso groups of guanidine from cyanamide, calcium cyanamide or dicyandiamides
B29B 17/02 - Separating plastics from other materials
C08J 11/10 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
57.
WATER REPELLENT, SOIL RESISTANT, FLUORINE-FREE COMPOSITIONS
The present invention pertains to a fluorine-free composition for treating textile articles being water repellant, sol resistant and stain resistant, especially carpets comprising a first composition comprising an aqueous silicone emulsion, an aqueous dispersion of a silane quaternary ammonium salt and water and a second composition comprising a soil repellency component that is an aqueous dispersion of colloidal organosiloxane copolymers.
D06M 15/263 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acidsSalts or esters thereof
Methods for preparing esters by ozonolysis of cycloolefins are provided wherein, for example, an intermediate of formula IIa: is transformed to a compound of formula III:, wherein A is a C6-C10alkene chain with at least one double bond, R1 is a C1-C10alkyl, and R3 is an oxygen-containing functional group.
C07C 45/40 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by oxidation with ozonePreparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by ozonolysis
A fiber and method for making the same is disclosed that comprises a surface treatment, wherein the surface treatment comprises at least one clay nanoparticle component present in an amount greater than 2000 ppm on the surface of the fiber. Also disclosed is a fiber and method for making the same, comprising a surface treatment, wherein the surface treatment comprises at least one clay nanoparticle component and excludes flourochemicals.
D06M 11/00 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereofSuch treatment combined with mechanical treatment, e.g. mercerising
A multipolymer fiber comprising a polyester phase formed from at least one polyester resin, present at between about 50 to about 95 percent by weight and a polyamide phase formed from at least one polyamide resin, present at between about 5 to about 50 percent by weight, wherein the polyamide phase is distinct from the polyester phase and comprises a plurality of polyamide fibrils dispersed in the polyester phase, and wherein the polyamide fibrils are separately distinguishable from each other.
D01F 8/00 - Conjugated, i.e. bi- or multicomponent, man-made filaments or the likeManufacture thereof
D01F 8/12 - Conjugated, i.e. bi- or multicomponent, man-made filaments or the likeManufacture thereof from synthetic polymers with at least one polyamide as constituent
D01F 8/14 - Conjugated, i.e. bi- or multicomponent, man-made filaments or the likeManufacture thereof from synthetic polymers with at least one polyester as constituent
D02G 3/44 - Yarns or threads characterised by the purpose for which they are designed
61.
STRETCH CIRCULAR KNIT FABRICS WITH MULTIPLE ELASTIC YARNS
An article comprising a knit fabric having a surface side and a base side, and including a set of ground yarns and a layer of effect yarns, wherein the ground yarns and effect yarns are knit through intermesh points in a predetermined arrangement wherein the effect yarns are alternately arranged with the ground yarns and wherein the ground yarns comprise at least one elastic fiber and optionally at least one hard fiber, and the effect yarns comprise at least one hard fiber and optionally an elastic fiber.
A composite film comprising one or more barrier film layers, wherein the one or more barrier film layers are liquid impermeable and have a total moisture vapor transfer rate (MVTR) of at least 14.6 g/24hr/m2 according to ASTM E96B and one or more dimensionally stable layers, wherein the composite film has a robustness of greater than about 1.49 pound force.
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 3/24 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an apertured layer, e.g. of expanded metal
63.
METHODS AND SYSTEMS FOR PREPARATION OF 1,3-BUTADIENE
The present disclosure is directed to 1,3-butadiene processes and systems. Such methods and systems can include dimerization of ethylene to produce a first product stream, including n-butene. The first product stream can be converted to a second product stream, including 1,3-butadiene, via oxidative dehydrogenation. The second product stream can be distilled via at least a first extractive distillation step to produce a 1,3-butadiene fraction and a raffinate product. At least a portion of the raffinate product can be recycled and/or fed to additional partitioning steps.
C07C 5/48 - Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with a hydrogen acceptor with oxygen as an acceptor
64.
IMPROVED PROCESS FOR MANUFACTURE OF TETRAHYDROFURAN
The disclosed process relates to an improved process for manufacturing THF from a reaction mixture comprising BDO in the presence of an acid catalyst in a reaction vessel comprising a distillation reaction zone, wherein the acid catalyst is suspended in a vapor-rich region in the distillation reaction zone.
Disclosed is a method for hydrogenating a dinitrile to form a diamine. Also disclosed is a method for preparing a catalyst for this hydrogenation reaction by reducing iron oxide with hydrogen. The catalyst ages during the course of making the diamine. An aged catalyst is partially reactivated by abruptly interrupting the flow of feed to reactors.
C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
Disclosed is a method for hydrogenating a dinitrile to form a diamine in the presence of ammonia. A liquid stream including a dinitrile is used to scrub a vapor stream including hydrogen and ammonia. Ammonia is taken up in the liquid effluent from the scrubbing treatment. This liquid effluent stream and the hydrogen-rich scrubbed vapors are recycled to the hydrogenation reaction for converting dinitrile to diamine.
C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
An elastic fiber is provided that includes polyurethane and/or polyurethaneurea and an additive such as polystyrene, an acrylic polymer, polyvinylpyrrolidone, copolymers thereof, derivatives thereof, and combinations thereof. The elastic fiber is useful in laminate structures, such as disposable hygiene articles as wells as in knit, woven and nonwoven fabric constructions.
D03D 15/08 - Woven fabrics characterised by the material or construction of the yarn or other warp or weft elements used using stretchable or elastic threads
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
D01F 8/00 - Conjugated, i.e. bi- or multicomponent, man-made filaments or the likeManufacture thereof
68.
HYDROGENATION PROCESS FOR MAKING DIAMINE FROM DINITRILE
Disclosed is a method for hydrogenating a dinitrile to form a diamine. Also disclosed is a method for preparing a catalyst for this hydrogenation reaction by reducing iron oxide with hydrogen. Heat in a fluid stream involved in the refinement of a crude dinitrile stream is used to provide heat for the hydrogenation of a dinitrile to form a diamine.
C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
Disclosed is a method for hydrogenating a dinitrile to form a diamine. Also disclosed is a method for preparing a catalyst for this hydrogenation reaction by reducing iron oxide with hydrogen. The catalyst ages during the course of making the diamine. An aged catalyst is partially reactivated by interrupting the flow of dinitrile and ammonia feed to a reactor, while maintaining a flow of hydrogen to the reactor.
C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
Disclosed is a method for hydrogenating a dinitrile, such as adiponitrile, in the presence of ammonia to form a diamine, such as hexamethylenediamine. Also disclosed is a method for preparing a catalyst for this hydrogenation reaction by reducing iron oxide with hydrogen. Anhydrous ammonia is separated from a liquid mixture of ammonia and diamine in three distillation steps. The pressure of the liquid is reduced from, for example, 500 psig (3,549 kPa) to, for example, 2 psig (115 kPa), over the course of these three distillation steps. The anhydrous ammonia, which is separated from liquid mixture of ammonia and diamine is recovered and may be recycled to the hydrogenation reaction.
This document describes biochemical pathways for producing glutaric acid, 5-aminopentanoic acid, 5-hydroxypentanoic acid, cadaverine or 1,5-pentanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C5 backbone substrate such as D-proline.
This document describes biochemical pathways for producing methacrylate from precursors such as pyruvate via isobutyraldehyde and isobutyryl-CoA, using enzymes such as one or more thioesterases, transferases, or dehydrogenases, as well as recombinant hosts expressing one or more of such enzymes.
This document describes biochemical pathways for producing isoprene by forming two vinyl groups in a central precursor produced from isobutyryl-CoA, 3-methyl-2-oxopentanoate, or 4-methyl-2-oxopentanoate as well as recombinant hosts for producing isoprene.
The document provides methods for biosynthesizing isobutene using one or more isolated enzymes such as one or more of a hydratase such as an enzyme classified under EC 4.2.1.- and a decarboxylating thioesterase, or using recombinant host cells expressing one or more such enzymes.
C12N 15/66 - General methods for inserting a gene into a vector to form a recombinant vector using cleavage and ligationUse of non-functional linkers or adaptors, e.g. linkers containing the sequence for a restriction endonuclease
A continuous fiber thermoplastic composite of high flow, low viscosity thermoplastic resin and continuous fiber and articles of manufacture produced from the composite, as well as methods of production and use of the continuous fiber thermoplastic composite are provided.
This document describes biochemical pathways that include the production of 3-oxopent-4-enoyl-CoA by condensation of acryloyl-CoA and acetyl-CoA using a β-ketothiolase with a SER-HIS-HIS catalytic triad. These pathways described herein rely on enzymes such as, inter alia, dehydrogenases, dehydratases and β-ketothiolases.
Disclosed is a process for extending the useful life of a hydrogenation catalyst for making diamines in which 2-methylglutaronitrile and adiponitrile are charged separately to the catalyst in sequence with an intervening step of contacting the catalyst with hydrogen and ammonia at elevated temperature.
C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
A solvent is at least partially separated from a catalyst. The catalyst comprises nickel and a bidentate phosphorus-containing ligand. The method for separation involves distilling a catalyst solution. The ratio of 2-pentenenitrile to 3-pentenenitrile in distillation column bottoms is controlled to reduce the amount of 3-pentenenitrile which is isomerized to form 2-methyl-3-butenenitrile. Isomerization of 3-pentenenitrile to 2- methyl-3-butenenitrile, and subsequent isomerization of 2-methyl-3-butenenitrile to 2- methyl-2-butenenitrile, and/or hydrocyanation of 2-methyl-3-butenenitrile to methylglutaronitrile represents a loss in adiponitrile yield in a process for making adiponitrile.
A method of making a compound of formula (IIa) by selective ozonolysis of a compound of formula (I) is provided, wherein A is a C6-C10 alkene chain with at least one double bond, R1 is a C1-C10 alkyl, and R3 is an oxygen-containing functional group.
C07C 409/20 - Peroxy compounds the —O—O— group being bound to a carbon atom further substituted by singly-bound oxygen atoms
C07C 45/40 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by oxidation with ozonePreparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by ozonolysis
C07C 47/21 - Unsaturated compounds having —CHO groups bound to acyclic carbon atoms with only carbon-to-carbon double bonds as unsaturation
The present invention provides an improved process for manufacturing and recovering butynediol from a reaction mixture comprising an aqueous solution containing formaldehyde, acetylene and suspended catalyst solids in a particular reaction zone, such as a reactor vessel devoid of internal filter assemblies, whereby a product slurry stream comprising butynediol and suspended catalyst solids is removed from the reaction zone and fed to a filter zone external from the reaction zone, the product slurry stream being moved to the external filter zone by injection of a composition comprising acetylene at a point between the reaction zone and the filter zone.
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
C07C 29/42 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring increasing the number of carbon atoms by reactions with formation of hydroxy groups, which may occur via intermediates being derivatives of hydroxy groups, e.g. O-metal by reaction with aldehydes or ketones with compounds containing triple carbon-to-carbon bonds, e.g. with metal-alkynes
The present disclosure is directed to the use of microemulsions and microemulsion concentrates for removal of contaminants from cellulosic materials, such as waste papers.
Described is a method for the production and recovery of hydrogen cyanide, which includes removing ammonia from a crude hydrogen cyanide stream. The method integrates heat removed from a crude hydrogen cyanide stream into other areas of the hydrogen cyanide recovery process. The crude hydrogen cyanide stream may be passed through a first waste heat boiler and a second waste heat boiler prior to being fed to an ammonia absorber, which produces a hydrogen cyanide rich stream. Hydrogen cyanide is recovered from the hydrogen cyanide rich stream. Equipment fouling with HCN polymer is reduced.
F22B 1/18 - Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
The present invention provides an improved process for preferentially concentrating 2-methylglutaronitrile from mixtures comprising 2-methyl-glutaronitrile and other C6 nitriles having very close relative volatilities, for example, 2-ethylsuccinonitrile and adiponitrile, in a particular integrated, continuous distillative refining process, advantageously utilizing a carefully staged distillation apparatus train and by operating in an optimized window for effective separation.
C07C 255/04 - Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and saturated carbon skeleton containing two cyano groups bound to the carbon skeleton
Included is a polyurethane elastic fiber that includes a blended glycol. A polyether glycol, such as PTMEG is partially replaced with PPG. The ratio of total isocyanate (NCO) end groups from the prepolymer to total primary amine (NH2) end groups from the diamine chain extender is about (0.99) to about (1.01); and the combined amount of non-reactive end groups from the PPG and dialkylurea end groups in the polyurethaneurea is less than about (50) meq/kg.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.
Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.
Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are pre-treatments to enhance extractability of the diphosphonite-containing compounds.
Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.
C07C 255/04 - Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and saturated carbon skeleton containing two cyano groups bound to the carbon skeleton
Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.
C07C 255/04 - Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and saturated carbon skeleton containing two cyano groups bound to the carbon skeleton
Included are segmented polyurethane elastic fibers or spandex fibers, capable of bonding to polymer fiber such as nylon or polyamide fibers, in addition to bonding to itself, for apparel textile applications. More particularly the invention relates to bicomponent spandex fibers, with a heat resistant core and a heat sensitive sheath, spun from polymer solutions. The nylon fabrics containing such spandex fibers have enhanced stretch performance and improved surface appearance after heat treatment to activate the fusing and bonding between nylon fibers and spandex fibers.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
91.
POWER RECOVERY FOR USE IN START-UP OR RE-START OF A PURE TEREPHTHALIC ACID PRODUCTION PROCESS
The invention relates to a method and system for recovering power from the gaseous stream produced by a paraxylene - air oxidation reaction. Specifically, the invention is based on heating the gaseous stream from the oxidation reaction to a temperature of at least 600°C, recovering energy through an expander, heating the expander vent stream and recovering heat from the vent stream. The recovered heat is used to maintain the oxidation process, purification process, start-up the process, or re¬ start the process after an interruption.
F02C 6/18 - Plural gas-turbine plantsCombinations of gas-turbine plants with other apparatusAdaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
F01K 25/14 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours using industrial or other waste gases
F23J 15/02 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
The invention is related to methods for purifying aqueous waste streams from a pure terephthalic acid (PTA) manufacturing plant and recycling of the purified water back into the PTA plant. The invention also relates to novel aqueous waste stream and purified water stream compositions.
The present disclosure relates to systems and methods for manufacturing a polyamide. The method can include obtaining, from a reservoir, an aqueous solution comprising a dicarboxylic acid, a diamine, and water having a substantially liquid phase; concentrating the aqueous solution including transforming a portion of the water having a substantially liquid phase to water having a substantially gaseous phase; condensing the water having a substantially gaseous phase into condensed water having a substantially liquid phase; removing at least one impurity from at least one of the condensed water having a substantially liquid phase and the water having a substantially gaseous phase to produce cleaned water having a substantially liquid phase; and reusing the cleaned water having a substantially liquid phase. The system can include, among other things, a reservoir; an evaporator assembly, in fluid communication with the reservoir; a condensation assembly, in fluid communication with the evaporator assembly; a collection assembly; and a conduit network.
Systems and processes are described herein for drying polyamide pellets. The system can include a spin dryer that removes a majority of surface water from wet polyamide pellets to generate partially dried pellets. The system can also include a fluid bed dryer that dries and transports the partially dried pellets from the spin dryer to produce dried polyamide pellets.
F26B 7/00 - Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups or
F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle
F26B 17/22 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors moving materials in stationary chambers the axis of rotation being vertical or steeply inclined
A system is configured for continuous polyamide synthesis. The system includes a vent condenser and a vacuum pump. The vent condenser is coupled to a polymerization finisher. The vent condenser has a liquid reservoir and a vent discharge port above a level of the liquid reservoir. The vacuum pump is coupled to the vent discharge port by an intake line. The vacuum pump has an output port and a rotary shaft. A gaseous mixture proximate the vent discharge port is removed at a rate determined by a speed of the rotary shaft. The vacuum pump is configured to have a liquid ring seal.
Described herein are methods of preparing high molecular weight polyamides which reduce or eliminate the production of unwanted gels during the production process. These methods reduce the formation of undesired polyamide gel by polishing the internal surfaces of the production equipment, thereby providing surfaces with smaller surface roughness values.
B24B 31/116 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is looseAccessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
A valve includes a valve body and a bolt. The valve body has an input port and an output channel coupled by a primary passageway. The valve body has a bolt bore aligned to intersect the primary passageway. The valve body has a divert port disposed at an end of the bolt bore. The valve body has an intersection at the output channel and the primary passageway including a gradual transition. The bolt has a first end and a second end aligned on a longitudinal axis. The bolt has a through passageway aligned transverse to the longitudinal axis and has a divert passageway disposed between a side aperture and the first end. The bolt is configured for slidable engagement with the bolt bore.
B29B 7/80 - Component parts, details or accessoriesAuxiliary operations
B29C 47/08 - Component parts, details or accessories; Auxiliary operations
F16K 3/26 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
The present disclosure relates to methods and systems for monitoring for gel formation in the production of a polyamide product. In one embodiment, the present invention provides a method that can include directing a partially polymerized polyamide mixture through a flasher feed pump, a finisher pump, and a transfer line pump. The method can include switching the flasher feed pump, the finisher pump, and the transfer line pump from a first operating mode to a second operating mode. The method can include activating a gel time control unit and can be activated to estimate a gelation time for at least one of a flasher, a finisher, and a transfer line. The method can include switching a reactor of the polyamide synthesis system from the first operating mode to the second mode.
A system for the preparation of a polyamide comprises a primary polymerization system configured to convert one or more starting materials to a polyamide product, a conduit downstream from the primary polymerization system, the conduit configured to transfer the polyamide product, and a feed line including an output into the conduit, wherein the feed line is configured to feed a copper-containing composition into the conduit. A method of forming a polyamide composition comprises polymerizing one or more starting materials in a primary polymerization system to form a polyamide product, transferring the polyamide product from the primary polymerization system in a conduit, and feeding a copper-containing composition into the conduit downstream of the primary polymerization system.
An agitated autoclave comprises an autoclave vessel, an agitator, and a mechanical seal. The autoclave vessel can be adapted to receive and polymerize a polyamide salt composition to form a polyamide polymer. The agitator includes a shaft, an auger portion, and a drive portion. The mechanical seal forms a pressure boundary about the shaft at or adjacent to a wall of the autoclave vessel. The mechanical seal includes a pressurized water chamber pressurized with seal water in contact with the shaft and is held at a seal pressure greater a vessel pressure within the autoclave vessel. The seal water in the pressurized water chamber has a calcium content of less than 3 ppm and an iron content of less than 0.3 ppm.
patents
