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 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
2.
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 - Treatment of water, waste water, or sewage by sorption
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
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.
The present invention provides for improved gas cleaning methods in the production of a sulphur dioxide containing gas suitable for sulphuric acid manufacture. In a metallurgical acid plant, the method comprises the sequential steps of: saturating and cooling hot gas in a Quench Venturi & Retention Vessel, scrubbing and cooling the process gas in a Scrubber Venturi & Gas Cooling Tower to the required water balance for acid production, and removing the bulk of very fine particulates in a Wet Electrostatic Precipitator. In a sulphuric acid regeneration plant, the method comprises the sequential steps of: saturating and cooling hot gas in a Quench Venturi, cooling the process gas in a Gas Cooling Tower to the required water balance for acid production, and removing the bulk of the very fine particulates in a Wet Electrostatic Precipitator.
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 - 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
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 method and plant for the production of sodium chlorite are disclosed. The method involves using an "integrated ClO2 method" to make chlorine dioxide and then reacting that chlorine dioxide with alkaline sodium hydroxide in the presence of hydrogen peroxide. The related plant comprises a subsystem for making the chlorine dioxide in this manner and a sodium chlorite subsystem for the subsequent reacting.
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 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 - Mixtures of fertilisers covered individually by different subclasses of class
B01J 19/24 - Stationary reactors without moving elements inside
B01J 8/06 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds in tube reactorsChemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the solid particles being arranged in tubes
C01B 17/54 - Preparation of sulfur dioxide by burning elemental sulfur
C01B 21/04 - Purification or separation of nitrogen
C05B 11/08 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using sulfuric acid
C05C 3/00 - Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
F25J 3/04 - Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
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
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.
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.
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.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C22F 1/11 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of chromium or alloys based thereon
17.
AUSTENITIC STAINLESS ALLOY WITH SUPERIOR CORROSION RESISTANCE
Austenitic stainless alloys and methods of making same are disclosed for use in applications requiring high corrosion resistance. The stainless alloys are particularly suitable for applications involving exposure to high temperature, concentrated sulfuric acid such as industrial sulfuric acid production. Such alloys are characterized by compositions in weight % of 36-40% chromiumõ32.5-36% nickel,1.5-2.0% manganese, 0.35-0.6% nitrogen, < 0.3% silicon, < 0.02% carbon, < 0.02% phosphorus, < 0.04% molybdenum, < 0.02% copper, < 0.005% sulfur and the remainder consisting essentially of iron.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22F 1/11 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of chromium or alloys based thereon
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
18.
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 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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 - 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 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 methods for the purification of an 502-containing exhaust gas without first drying the gas, and to devices for performing such methods. The method involves supplying 502-containing rich gas into a gas pre-heater, in which air is added thereto before it enters the gas pre-heater, and then heating the 502-containing rich gas with the added air in the gas pre-heater.
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.
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. Further, existing hypochlorite production systems can be expanded without increasing the capabilities for primary and secondary brine treatment.
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.
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.
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.
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.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
20 - Furniture and decorative products
35 - Advertising and business services
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & 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.
43.
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 - Scientific and electric apparatus and instruments
17 - Rubber and plastic; packing and insulating materials
35 - Advertising and business services
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & 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 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & 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 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & 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.
47.
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 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28F 13/04 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
F28F 19/00 - Preventing the formation of deposits or corrosion, e.g. by using filters
50.
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 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 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 - Treatment of water, waste water, or sewage by ion-exchange
B01J 43/00 - Amphoteric ion-exchange, i.e. using ion-exchangers having cationic and anionic groupsUse of material as amphoteric ion-exchangersTreatment of material for improving their amphoteric ion-exchange properties
C02F 1/58 - Treatment of water, waste water, or sewage by removing specified dissolved compounds
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.
A shell and tube heat exchanger particularly of enhanced diameter size of use, particularly, in the manufacture of sulfuric acid and having a plurality of an adjacent pair of longitudinal baffle plates located symmetrically and intermittently between and extending the length of the tube bundle. The exchanger is most advantageously made from segments which may be shipped to off site locations for in situ manufacture of the heat exchanger, particularly when oversized heat exchangers are required when transportation of such large heat exchangers from an off site manufacturing facility is not possible.
F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
F28F 1/00 - Tubular elementsAssemblies of tubular elements
06 - Common metals and ores; objects made of metal
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & 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 - Scientific, technological and industrial services, research and design
37 - Construction and mining; installation and repair services
Goods & 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 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & 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.
