Austenitic stainless alloys have been discovered that exhibit unexpectedly superior corrosion resistance, particularly to sulfuric acid solutions, when compared to that exhibited by conventional alloys with closely related compositions. These alloys advantageously are corrosion resistant to a relatively wide range of sulfuric acid concentration and temperature and are thus particularly suitable for use in the industrial production of sulfuric acid.
Improved systems and methods are disclosed for treating tail gas in a sulfuric acid production plant. A tail gas treatment system is employed which comprises a product stripper and a purge gas scrubber. The inventive arrangement provides an advantageous economical way to remove high levels of SO2 from the tail gas stream.
The invention relates to methods for synthesizing an engineered adsorbent suitable for the selective extraction of lithium from brine solutions. The invention describes the advantages of introducing mixed metal oxides into the crystal lattice of anatase titania precursor. The invention offers significant advantages, including high adsorption capacity of the ion sieve, enhanced chemical stability of the sorbent, and higher lithium selectivity.
B01J 20/04 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant des composés des métaux alcalins, des métaux alcalino-terreux ou du magnésium
B01J 20/10 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant de la silice ou un silicate
B01J 20/02 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique
B01J 20/30 - Procédés de préparation, de régénération ou de réactivation
B01D 15/08 - Adsorption sélective, p. ex. chromatographie
4.
Method of Synthesizing an Engineered Adsorbent for Selective Extraction of Lithium
The invention relates to methods for synthesizing an engineered adsorbent suitable for the selective extraction of lithium from brine solutions. The invention describes the advantages of introducing mixed metal oxides into the crystal lattice of anatase titania precursor. The invention offers significant advantages, including high adsorption capacity of the ion sieve, enhanced chemical stability of the sorbent, and higher lithium selectivity.
B01J 20/10 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant de la silice ou un silicate
5.
METHOD FOR PRODUCING CONCENTRATED OLEUM OR SULFUR TRIOXIDE
Methods and associated production plants are disclosed for producing concentrated oleum or sulfur trioxide therefrom with high purity, and particularly with minimal sulfur dioxide. The methods involve use of a single contact, single absorption sulfuric acid plant operating under an unconventional set of parameters including: reacting sulfur and high purity oxygen in a combustion reactor to form sulfur dioxide at a concentration between 11.5 and 20% by volume and with an atypical oxygen to sulfur dioxide molar ratio ≥ 1; atypically catalytically converting > 96% by volume of the sulfur dioxide to sulfur trioxide in a contact apparatus; and atypically recycling > 95% by volume of the total gases from an absorption apparatus to the combustion reactor. Concentrated oleum with < 300 ppm dissolved sulfur dioxide can desirably be produced with sulfur utilization ≥ 80% using a smaller, cost-effective sulfuric acid plant. The co-production of unnecessary sulfuric acid can also be reduced.
An engineered adsorbent for the selective extraction of lithium from brine solutions. Mixed metal oxides are introduced into the crystal lattice of anatase titania precursor. The invention offers significant advantages, including high adsorption capacity of the ion sieve, enhanced chemical stability of the sorbent, and higher Lithium selectivity.
B01J 20/04 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant des composés des métaux alcalins, des métaux alcalino-terreux ou du magnésium
7.
DIRECT EXTRACTION OF LITHIUM USING MICRO-ENGINEERED ADSORBENT
An engineered adsorbent for the selective extraction of lithium from brine solutions. Mixed metal oxides are introduced into the crystal lattice of anatase titania precursor. The invention offers significant advantages, including high adsorption capacity of the ion sieve, enhanced chemical stability of the sorbent, and higher Lithium selectivity.
C02F 1/28 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par absorption ou adsorption
C22B 3/24 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques par adsorption sur des substances solides, p. ex. par extraction avec des résines solides
B01J 20/02 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique
C02F 103/08 - Eau de mer, p. ex. pour le dessalement
8.
SYSTEMS AND METHODS FOR PRODUCING SULFURIC ACID OR LIQUEFIED SULFUR DIOXIDE
Improved systems and methods are disclosed for producing sulfuric acid or for producing liquefied sulfur dioxide. The systems comprise a reactor for the combustion of sulfur to sulfur dioxide, a reactor gases heat exchanger, and either a contact apparatus and absorption apparatus combination or an absorption subsystem and liquefaction apparatus combination for producing either sulfuric acid or liquid sulfur dioxide respectively. By appropriately incorporating two recycle circuits, the first after the reactor gases heat exchanger and the second after the absorption apparatus or liquefaction apparatus, several advantages can be obtained. These include reductions in equipment size, complexity, power consumption energy losses, and suppression of NOx.
Improved systems and methods are disclosed for producing sulfur dioxide using oxygen and submerged combustion. By incorporating a vapour phase combusting step in addition to the submerged combusting step, the downstream sulfur condenser may be made substantially smaller with reduced complexity and cost. Further, energy recovery is simplified and improved.
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
Improved systems and methods are disclosed for producing sulfuric acid or for producing liquefied sulfur dioxide. The systems comprise a reactor for the combustion of sulfur to sulfur dioxide, a reactor gases heat exchanger, and either a contact apparatus and absorption apparatus combination or an absorption subsystem and liquefaction apparatus combination for producing either sulfuric acid or liquid sulfur dioxide respectively. By appropriately incorporating two recycle circuits, the first after the reactor gases heat exchanger and the second after the absorption apparatus or liquefaction apparatus, several advantages can be obtained. These include reductions in equipment size, complexity, power consumption energy losses, and suppression of NOx.
Integrated plants and associated processes for producing ammonia and sulfuric acid have been developed comprising air separation and water electrolysis subsystems and which make surprisingly efficient use of the products from these subsystems (i.e. oxygen and nitrogen from the former and hydrogen and oxygen from the latter). The invention is particularly suitable for use as part of an integrated fertilizer production plant.
C05G 1/00 - Mélanges d'engrais faisant partie individuellement de différentes sous-classes de
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
B01D 53/18 - Unités d'absorptionDistributeurs de liquides
B01J 8/06 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés avec des particules immobiles, p. ex. dans des lits fixes dans des réacteurs tubulairesProcédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés avec des particules immobiles, p. ex. dans des lits fixes les particules solides étant disposées dans des tubes
B01J 19/24 - Réacteurs fixes sans élément interne mobile
C01B 17/54 - Préparation de l'anhydride sulfureux en brûlant du soufre élémentaire
C01B 17/765 - Conversion de SO3 en plusieurs stades
C02F 1/16 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par chauffage par distillation ou évaporation utilisant la chaleur perdue provenant d'autres procédés
C05B 11/08 - Traitement par un acide minéral par l'acide sulfurique
C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
F25J 3/04 - Procédés ou appareils pour séparer les constituants des mélanges gazeux impliquant l'emploi d'une liquéfaction ou d'une solidification par rectification, c.-à-d. par échange continuel de chaleur et de matière entre un courant de vapeur et un courant de liquide pour l'air
C02F 103/08 - Eau de mer, p. ex. pour le dessalement
13.
SYSTEM AND METHOD FOR PRODUCING SULFUR DIOXIDE AND ASSOCIATED SULFURIC ACID PLANT
Improved systems and methods are disclosed for producing sulfur dioxide using oxygen and submerged combustion. By incorporating a vapour phase combusting step in addition to the submerged combusting step, the downstream sulfur condenser may be made substantially smaller with reduced complexity and cost. Further, energy recovery is simplified and improved.
Austenitic stainless alloys have been discovered that exhibit unexpectedly superior corrosion resistance, particularly to sulfuric acid solutions, when compared to that exhibited by conventional alloys with closely related compositions. These alloys advantageously are corrosion resistant to a relatively wide range of sulfuric acid concentration and temperature and are thus particularly suitable for use in the industrial production of sulfuric acid.
Integrated plants and associated processes for producing ammonia and sulfuric acid have been developed comprising air separation and water electrolysis subsystems and which make surprisingly efficient use of the products from these subsystems (i.e. oxygen and nitrogen from the former and hydrogen and oxygen from the latter). The invention is particularly suitable for use as part of an integrated fertilizer production plant.
Austenitic stainless alloys have been discovered that exhibit unexpectedly superior corrosion resistance, particularly to sulfuric acid solutions, when compared to that exhibited by conventional alloys with closely related compositions. These alloys advantageously are corrosion resistant to a relatively wide range of sulfuric acid concentration and temperature and are thus particularly suitable for use in the industrial production of sulfuric acid.
C21D 6/00 - Traitement thermique des alliages ferreux
C22C 30/00 - Alliages contenant moins de 50% en poids de chaque constituant
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
C22F 1/16 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid des autres métaux ou de leurs alliages
C21D 8/00 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique
C22F 1/11 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du chrome ou de ses alliages
17.
Energy efficient sulfuric acid system for humid environments
A contact process, sulfuric acid system and method are disclosed for producing sulphuric acid with improved operating efficiency in humid environments. The system comprises a pre-drying absorber for pre-drying humid air with weak sulfuric acid. Weak sulfuric acid from the pre-drying absorber is provided to a subsystem comprising two sulfur trioxide absorbers and a heat exchanger for the recovery of heat via steam production. This arrangement allows for a marked increase in steam production (i.e. energy efficiency). In a separate improvement, the emission apparatus for the system can be simplified using a peroxide tail gas scrubber comprising upper and lower scrubber sections in which the upper scrubber section consists essentially of tray type scrubbers.
F28D 7/00 - Appareils échangeurs de chaleur comportant des ensembles de canalisations tubulaires fixes pour les deux sources de potentiel calorifique, ces sources étant en contact chacune avec un côté de la paroi d'une canalisation
F28F 9/02 - Boîtes de distributionPlaques d'extrémité
18.
Single contact, single absorption system for producing sulfuric acid with high conversion efficiency
Commercial production of sulfuric acid is almost entirely accomplished nowadays using the contact process. And the trend is to increase conversion efficiency and reduce emissions of unconverted sulfur dioxide. By using a special combination of contact catalyst beds, a single contact single absorption (SCSA) system can be engineered to achieve the conversion and emission capabilities of conventional double contact double absorption systems. Thus, the complexity and cost of incorporating a second absorption tower and associated heat exchanger in the system can be omitted. In the SCSA system, the initial catalyst bed or beds comprise vanadium oxide catalyst and the last catalyst bed or beds comprise platinum catalyst operating at a much lower temperature than the initial beds.
A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
B01D 53/18 - Unités d'absorptionDistributeurs de liquides
A contact process, sulfuric acid system and method are disclosed for producing sulphuric acid with improved operating efficiency in humid environments. The system comprises a pre-drying absorber for pre-drying humid air with weak sulfuric acid. Weak sulfuric acid from the pre-drying absorber is provided to a subsystem comprising two sulfur trioxide absorbers and a heat exchanger for the recovery of heat via steam production. This arrangement allows for a marked increase in steam production (i.e. energy efficiency). In a separate improvement, the emission apparatus for the system can be simplified using a peroxide tail gas scrubber comprising upper and lower scrubber sections in which the upper scrubber section consists essentially of tray type scrubbers.
Commercial production of sulfuric acid is almost entirely accomplished nowadays using the contact process. And the trend is to increase conversion efficiency and reduce emissions of unconverted sulfur dioxide. By using a special combination of contact catalyst beds, a single contact single absorption (SCSA) system can be engineered to achieve the conversion and emission capabilities of conventional double contact double absorption systems. Thus, the complexity and cost of incorporating a second absorption tower and associated heat exchanger in the system can be omitted. In the SCSA system, the initial catalyst bed or beds comprise vanadium oxide catalyst and the last catalyst bed or beds comprise platinum catalyst operating at a much lower temperature than the initial beds.
The invention relates to a continuous process for purifying a gas containing 60-99 percent SO2 (sulfur dioxide) by volume and 1 to 40 percent steam by volume, followed by synthesis of SO3 (sulfur trioxide) without first drying the gas, and to an apparatus for carrying out said method.
Methods are disclosed for removing alkali metal iodide from concentrated aqueous alkali metal chloride solutions using ion retardation resins. The methods are suitable for solutions comprising substantially more than 1 ppm iodide and greater than 100 g/l alkali metal chloride and can remove the iodide to levels below 1 ppm. To effect removal, the pH of the solution is adjusted to be less than about 10 and is then flowed through a separation bed comprising the resin in a series of loading and elution cycles. The method is particularly useful for removing iodide impurity from the concentrated feed brine used in chloralkali electrolysis.
A method of welding a ferritic stainless steel part to a carbon steel part is described. The method comprises arc welding (e.g. GTAW welding) the ferritic stainless steel part to the carbon steel part using a duplex stainless steel filler metal. Welded article made in this way is useful for industrial electrolyzers and particularly for corrosion resistant cathode and carrier plate assemblies in a sodium chlorate electrolyzer.
An undivided electrolysis cell for electrolyzing a liquor is disclosed which has a narrow gap between the electrodes and improved energy efficiency. The electrolysis cell comprises a porous anode, a porous cathode, and an electrically insulating separator therebetween which are all permeable to the liquor. Electrolysis is performed while directing the liquor through the porous anode, the electrically insulating separator, and the porous cathode. Gas products generated during electrolysis are carried out with the liquor and do not remain between the electrodes thereby reducing "gas blinding". The electrolysis cell is particularly suitable for chlorate electrolysis.
Commercial production of sulfuric acid is almost entirely accomplished nowadays using the contact process. And the trend is to increase conversion efficiency and reduce emissions of unconverted sulfur dioxide. By using a special combination of contact catalyst beds, a single contact single absorption (SCSA) system can be engineered to achieve the conversion and emission capabilities of conventional double contact double absorption systems. Thus, the complexity and cost of incorporating a second absorption tower and associated heat exchanger in the system can be omitted. In the SCSA system, the initial catalyst bed or beds comprise vanadium oxide catalyst and the last catalyst bed or beds comprise platinum catalyst operating at a much lower temperature than the initial beds.
High strength, low salt solutions of alkali hypochlorite (e.g. sodium hypochlorite) can advantageously be produced in a system comprising a subsystem in which alkali hydroxide solution and chlorine are reacted to produce alkali hypochlorite and salt solids in a crystallizer, while drawing a vacuum in the crystallizer. In a system comprising a chlor-alkali plant, the alkali hydroxide solution and chlorine can be directly obtained (i.e. without concentrating) from the electrolyzer in the plant. A net energy savings in the system can be achieved and water consumption in the chlor-alkali plant can be substantially decreased by returning chlorinated condensate from the crystallizer to the recycle line in the chlor-alkali plant. Salt can be efficiently recovered by redissolving the salt solids produced in depleted brine and returning it directly to the electrolyzer. As a result, high strength, low salt hypochlorite can be produced without the need to evaporate caustic.
A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.
Nanofiltration can be used to improve a hydrometallurgical process in which valuable metal is extracted from ore or tailings by leaching with a suitable lixiviant. The process requires at least two nanofiltration subsystems in which raffinate from a solvent extraction process is treated in a nanofiltration subsystem, after which permeate therefrom is combined with a pregnant solution stream and is treated in a second nanofiltration subsystem. This arrangement can lead to advantages in the amount of lixiviant recovered, in the raw materials required, in the effluent produced, in the size of plant, and in overall cost.
C22B 3/22 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques
C22B 3/44 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés chimiques
C22B 60/02 - Obtention du thorium, de l'uranium ou des autres actinides
Hollow fibre membrane modules (1) with a shell-side configuration often comprise a hollow fibre bundle (2) and a perforated hollow internal core (4) inside the bundle. A plug (5) in the core and a baffle (15) in the bundle are typically employed in order to desirably distribute supplied fluid over the bundle for separation purposes. The fluid flow distribution can be improved by incorporating suitable flow distributors (20, 21) within the internal core itself. Such modules are particularly useful for osmotic membrane distillation.
A method is disclosed for oxidizing sulfur dioxide using the contact process in which a gas stream comprising the sulfur dioxide and oxygen itself is used as the cooling medium in a contact apparatus comprising a double pipe heat exchanger. In associated systems for producing sulfuric acid, certain heat exchangers can be omitted thereby allowing for simpler and less expensive systems. The invention is suitable for systems using either a single or, in particular, a double absorption process. Further, the invention is suitable in new systems or in a retrofit of existing systems.
Fluoride ions can be removed from an aqueous stream to desirable levels (e.g. less than 1 ppm) using two precipitation reactions in series. In this method, calcium chloride and a phosphate salt are added to form a first precipitate and then a carbonate salt is added to form a second precipitate. However under certain circumstances, the conventional stoichiometries employed have been found to remove insufficient fluoride. Instead, sufficient fluoride can be removed by employing unconventional stoichiometries, specifically excessive calcium chloride or deficient carbonate salt.
Nanofiltration can be used to improve a hydrometallurgical process in which valuable metal is extracted from ore or tailings by leaching with a suitable lixiviant. The process requires at least two nanofiltration subsystems in which raffinate from a solvent extraction process is treated in a first nanofiltration subsystem, after which permeate therefrom is combined with a pregnant solution stream and is treated in a second nanofiltration subsystem. This arrangement can lead to advantages in the amount of lixiviant recovered, in the raw materials required, in the effluent produced, in the size of plant, and in overall cost.
C22B 3/22 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques
C22B 3/26 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques
C22B 60/02 - Obtention du thorium, de l'uranium ou des autres actinides
35.
SIDE STREAM REMOVAL OF IMPURITIES IN ELECTROLYSIS SYSTEMS
A side stream subsystem can be used to remove impurity species from the recirculating alkali metal chloride solution in certain electrolysis systems. Silicon and/or aluminum species can be removed via precipitation after introducing an alkali metal hydroxide and magnesium chloride in a side stream line in the subsystem. The invention can allow for a substantial reduction in raw material and capital costs.
Nanofiltration membranes have been identified that can unexpectedly provide for competitive removal of silica and sulfate from brine in alkaline conditions. Such membranes are known as monolithic nanofiltration membranes and are particularly suitable for removing silica and sulfate impurities from a brine stream in a brine electrolysis plant.
Sodium chlorate is produced industrially via electrolysis of brine and is thus an energy intensive process. An improved cathode for this and other industrial processes is a low nickel content stainless steel whose surface has been suitably modified. With an appropriate amount of surface roughening, the cathode provides for improved overvoltages during electrolysis while still maintaining corrosion resistance.
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
19 - Matériaux de construction non métalliques
20 - Meubles et produits décoratifs
35 - Publicité; Affaires commerciales
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Shell and tube heat exchangers for use by chemical and fertilizer manufacturers, pulp and paper producers, oil refiners, gas processors, power companies and base metal smelters.
(2) Chlorate electrolysers and industrial chemical processing and treatment equipment for the purification of brine solutions.
(3) Industrial chemical processing and treatment equipment for the reduction of sulphate and nanofiltration systems namely, nanofiltration membranes, spiral-wound membrane modules, hollow fibre membrance modules, membrane module housings, interconnection piping, feed pumps, temperature control sensors, pH control sensors, density intrumentation, flow control valves, flow meters, pressure transmitters, heat exchangers, pH adjustments, chlorine absorption, diversion valves, skids and assemblies.
(4) Industrial chemical processing and treatment equipment for chemical and fertilizer manufacturers and base metal smelters, namely open spray absorption towers.
(5) Industrial chemical treatment equipment for sulphuric acid treatment plants and carbon dioxide capture plants, namely liquid distributors in absorption and drying towers. (1) Design, procurement, and technical advisory services for the construction and commissioning of sulphuric acid plants and equipment, and plants and equipment for nitration and acid recovery.
(2) Design, procurement, and technical advisory services for the construction and commissioning of chlor-alkali, sodium chlorate, chlorine dioxide, calcium hypochlorite, hydrochloric acid and sodium hypochlorite plants and equipment.
(3) Design and sale of gas cleaning systems.
(4) Design and sale of sulphate removal systems and nanofiltration systems.
(5) Evaluation, feasibility studies, research and development, pilot plant design, process design and technical advisory services for the construction of systems and plants for others in the chemical, water purification, fertilizer and metal smelting industries.
(6) Consulting services for industrial sulphuric acid treatment plants, namely design, procurement, and technical advisory services for the construction and supervision of sulphuric treatment equipment and processes.
(7) Consulting services for industrial sulphuric acid treatment plants and carbon dioxide capture plants, namely design, procurement, and technical advisory services for the installation and supervision of absorption and drying towers.
39.
NANOFILTRATION PROCESS FOR ENHANCED BRINE RECOVERY AND SULFATE REMOVAL
In a nanofiltration system for removing sulfate impurity from an aqueous brine stream and for recovering the brine, introducing a dilution stream upstream of the feed stream inlet of a nanofiltration module in the system dilutes the feed stream. This increases the amount of brine salt and water obtained in the permeate stream without substantially diluting the concentration of sulfate in the pass stream and hence results in enhanced recovery of brine while efficiently removing sulfate impurity. The system and process is especially suitable for recovering brine and removing sulfate impurity from a brine stream in a brine electrolysis plant. In a conventional system, the heat exchanger typically used to cool the feed stream can be omitted if the dilution stream is provided at a temperature suitably lower than that of the feed stream.
09 - Appareils et instruments scientifiques et électriques
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
35 - Publicité; Affaires commerciales
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Industrial anodic protection corrosion control cathode seals for heat exchangers and process equipment (namely piping, tanks, columns and pressure vessels) for cooling and producing sulphuric acid. (1) Consulting, engineering, fabrication, maintenance and technical services namely design, procurement of components, assembly of components, supervision and maintenance replacement of components in heat exchangers and other sulphuric acid manufacturing equipment incorporating anodic protection corrosion control systems.
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Industrial chemical treatment equipment for sulphuric acid production plants and carbon dioxide capture plants, namely liquid distributors in gas-liquid contacting towers. (1) Consulting services for industrial sulphuric acid production plants and carbon dioxide capture plants, namely design, procurement of components, installation and supervision of liquid distributors.
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Industrial chemical processing and treatment equipment for chemical and fertilizer manufacturers and base metal smelters for energy generation. (1) Consulting services for industrial sulphuric acid production plants, namely design, procurement of components, construction, installation and supervision of sulphuric acid production equipment and processes for the generation of energy.
43.
Liquid distribution trough for use in towers in sulphuric acid and carbon capture plants
A liquid distribution trough contained within a tower for the purpose of mass or thermal exchange between at least a first liquid and a second fluid; the trough having an upper section and a lower section; the lower section for receiving the first liquid; a horizontal dividing member separating the upper section from the lower section and having at least one dividing member portion defining an aperture to allow for passage of the liquid fluid from the lower section to the upper section; a feed conduit means in communication with the lower section to provide feed first liquid flow to the lower section; the lower section having at least one inlet portion defining a liquid inlet in communication with the feed conduit means; and a first baffle adjacent the inlet portion operably impacted by the first liquid flow and to hinder preferential flow along the walls of the trough and the dividing member. The trough and tower are of particular value in a sulphuric acid plant and a carbon dioxide capture plant.
A process for exchanging heat in a shell and tube gas-to-gas heat exchanger between a plurality of gases, said process comprising passing a cold first gas in parallel flow to a second hot gas to provide a warmer first gas; and passing said warmer first gas in counter-current flow to a hot third gas to provide a cooler said third gas. The invention provides increased minimum tube wall temperature within the exchanger for given process conditions while maintaining a high log mean temperature differential allowing for the prevention of corrosion from entrained corrosive vapours or entrained corrosive mist with a minimal increase in effective area.
F28D 7/10 - Appareils échangeurs de chaleur comportant des ensembles de canalisations tubulaires fixes pour les deux sources de potentiel calorifique, ces sources étant en contact chacune avec un côté de la paroi d'une canalisation les canalisations étant disposées l'une dans l'autre, p. ex. concentriquement
F28F 13/04 - Dispositions pour modifier le transfert de chaleur, p. ex. accroissement, diminution en empêchant la formation de films continus de condensats sur les surfaces d'échange de chaleur, p. ex. en favorisant la formation de gouttelettes
F28F 19/00 - Prévention de la formation de dépôts ou de la corrosion, p. ex. en utilisant des filtres
46.
LIQUID DISTRIBUTION TROUGH FOR USE IN TOWERS IN SULPHURIC ACID AND CARBON CAPTURE PLANTS
A liquid distribution trough contained within a tower for the purpose of mass or thermal exchange between at least a first liquid and a second fluid; the trough having an upper section and a lower section; the lower section for receiving the first liquid; a horizontal dividing member separating the upper section from the lower section and having at least one dividing member portion defining an aperture to allow for passage of the liquid fluid from the lower section to the upper section; a feed conduit means in communication with the lower section to provide feed first liquid flow to the lower section; the lower section having at least one inlet portion defining a liquid inlet in communication with the feed conduit means; and a first baffle adjacent the inlet portion operably impacted by the first liquid flow and to hinder preferential flow along the walls of the trough and the dividing member. The trough and tower are of particular value in a sulphuric acid plant and a carbon dioxide capture plant.
B01D 3/00 - Distillation ou procédés d'échange apparentés dans lesquels des liquides sont en contact avec des milieux gazeux, p. ex. extraction
B01D 53/18 - Unités d'absorptionDistributeurs de liquides
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
47.
PERCHLORATE REMOVAL FROM CONCENTRATED SALT SOLUTIONS USING AMPHOTERIC ION-EXCHANGE RESINS
A process for reducing the concentration of perchlorate in an aqueous concentrated multi-component salt solution comprising treating the salt solution with an amphoteric ion- exchange resin to provide an adsorbed perchlorate and multi anion-containing resin and a perchlorate depleted solution; and removing the perchlorate depleted solution. The multi- anion are selected from chloride, chlorate, perchlorate, sulphate, and dichromate, present in electrolytic processes for the production of sodium chlorate.
C02F 1/42 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par échange d'ions
B01J 43/00 - Échange d'ions amphotère, c.-à-d. utilisant des échangeurs d'ions comportant des groupes anioniques et cationiquesUtilisation d'une substance comme échangeur d'ions amphotèreTraitement d'une substance en vue d'améliorer ses propriétés amphotères d'échange d'ions
C02F 1/58 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par élimination de composés spécifiés dissous
A process for purifying used sulfuric acid feed acid which contains, as minor constituents, methylsulfuric acid, dimethyl ether, methanol, aliphatic and olefinic hydrocarbons, chlorinated hydrocarbons and organosilicon compounds, which comprises a two-stage organic volatilization process comprising (a) diluting the used sulfuric acid with a stream selected from water, steam and an aqueous distillate mixture to a minimum temperature of about 100°C to effect hydrolysis of methyl sulfuric acid to methanol and sulfuric acid and vaporization of methyl chloride and dimethyl ether to provide a first diluted acid and a first volatile organic vapour comprising methyl chloride and dimethyl ether; (b) removing said methyl chloride and dimethyl ether vapour; (c) passing said diluted acid to an acid stripping column in counter-current flow with steam and, optionally, water to provide a second volatile organics vapour and a second diluted sulfuric acid; (d) removing said second volatile organics vapour; and collecting said second diluted sulfuric acid. The two-stage process eliminates charring of the organic materials in the stripping column and the formation of coating of the packing and release of particulate contaminants through subsequent concentration process steps.
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
Produits et services
(1) Austenitic stainless steel and articles of manufacture made therefrom, namely, heat exchangers, acid drying and absorber towers, acid distributors and mist eliminators for use in said drying and absorber towers, acid storage and pump tanks, acid pumps and piping, used in the manufacture and concentration of sulphuric acid.
42 - Services scientifiques, technologiques et industriels, recherche et conception
37 - Services de construction; extraction minière; installation et réparation
Produits et services
Design and Consulting Services Rendered in Connection with the Construction of Pollution Abatement Plants, Heat Exchangers for Sulphuric Acid Manufacturing Plants and Industrial Plants for the Bleaching of Pulp Custom Construction of Pollution Abatement Plants, Heat Exchangers for Sulphuric Acid Manufacturing Plants and Industrial Plants for the Bleaching of Pulp for Others
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Air and water purification systems for pollution abatement in pulp mills.
(2) Heat exchangers for sulphuric acid manufacturing plants. (1) Evaluation, feasibility studies, pilot plant design, operation and construction for other parties of engineered systems for pollution abatement.
(2) Design and construction for other parties of heat exchangers for sulphuric acid manufacturing plants.
(3) Design and construction for other parties of industrial plants for the bleaching of pulp.
