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公开(公告)号：US20230058065A1
公开(公告)日：2023-02-23
申请号：US17888074
申请日：2022-08-15
发明人： Gaurav Sant , Zongsu Wei , Bu Wang , Erika Callagon La Plante , Dante Simonetti
摘要： A method includes: (1) using a chelating agent, extracting divalent ions from a brine solution as complexes of the chelating agent and the divalent ions; (2) using a weak acid, regenerating the chelating agent and producing a divalent ion salt solution; and (3) introducing carbon dioxide to the divalent ion salt solution to induce precipitation of the divalent ions as a carbonate salt. Another method includes: (1) combining water with carbon dioxide to produce a carbon dioxide solution; (2) introducing an ion exchanger to the carbon dioxide solution to induce exchange of alkali metal cations included in the ion exchanger with protons included in the carbon dioxide solution and to produce a bicarbonate salt solution of the alkali metal cations; and (3) introducing a brine solution to the bicarbonate salt solution to induce precipitation of divalent ions from the brine solution as a carbonate salt.
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公开(公告)号：US11414323B2
公开(公告)日：2022-08-16
申请号：US16619534
申请日：2019-04-11
申请人： SENTEC CO. LTD. , Nanao Horiishi
发明人： Nanao Horiishi , Hiromoto Ueno
摘要： A treatment method for reducing carbon dioxide emission of combustion exhaust gas includes: a caustic soda synthesis step; a treatment step of reducing carbon dioxide emission of combustion exhaust gas; and a recycling step. In the caustic soda synthesis step, a natural sodium carbonate aqueous solution (Na2CO3) prepared by dissolving natural sodium carbonate ore powder composed of Na2CO3 and NaHCO3 in a caustic soda aqueous solution is used to generate a caustic soda aqueous solution and calcium carbonate precipitate by a causticization reaction with slaked lime, and solid-liquid separation is performed to obtain a synthetic caustic soda aqueous solution. In the treatment step, the synthetic caustic soda aqueous solution and purified combustion exhaust gas are brought into gas-liquid countercurrent contact so that carbon dioxide in the exhaust gas is absorbed by the synthetic caustic soda aqueous solution and immobilized as sodium carbonate.
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公开(公告)号：US11369918B2
公开(公告)日：2022-06-28
申请号：US16773293
申请日：2020-01-27
IPC分类号： B01D53/14 , B01D53/60 , B01D53/62 , B01D53/76 , B01D53/78 , B01D19/00 , C01D7/07 , C01D7/12 , C01D5/02 , C01D9/06 , C01D13/00 , C25B1/34
摘要： The disclosure provides seven integrated methods for the chemical sequestration of carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2) (collectively NOx, where x=1, 2) and sulfur dioxide (SO2) using closed loop technology. The methods recycle process reagents and mass balance consumable reagents that can be made using electrochemical separation of sodium chloride (NaCl) or potassium chloride (KCl). The technology applies to marine and terrestrial exhaust gas sources for CO2, NOx and SO2. The integrated technology combines compatible and green processes that capture and/or convert CO2, NOx and SO2 into compounds that enhance the environment, many with commercial value.
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公开(公告)号：US20210253438A1
公开(公告)日：2021-08-19
申请号：US17271830
申请日：2019-08-30
摘要： The present invention relates to a method for the production of sodium bicarbonate, particularly for producing sodium bicarbonate on an industrial scale, the method comprising the steps of: a. treating a carbonaceous feedstock to form a product stream comprising up to 10 v/v % carbon dioxide; b. capturing at least a portion of the carbon dioxide from the product stream to form a carbon dioxide stream; c. feeding the carbon dioxide stream to a reaction vessel; d. feeding an aqueous sodium carbonate solution to the reaction vessel; e. contacting at least a portion of the carbon dioxide stream with at least a portion of the aqueous sodium carbonate solution to form a slurry comprising solid sodium bicarbonate; and f. separating the solid component of the slurry from the liquid component of the slurry to provide solid sodium bicarbonate and an aqueous liquor.
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公开(公告)号：US10398652B2
公开(公告)日：2019-09-03
申请号：US14653616
申请日：2013-12-23
申请人： SOLVAY SA
摘要： Method for producing sodium bicarbonate particles by spray-drying of an aqueous solution comprising 1 to 10% by weight of sodium bicarbonate and an additive selected from the group consisting of: magnesium salt, sodium alkylbenzene sulfonate and soybean lecithin. Sodium bicarbonate particles obtainable by such process and comprising at least 20 mg of the additive per kg of sodium bicarbonate particles.
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公开(公告)号：US10233081B2
公开(公告)日：2019-03-19
申请号：US15319990
申请日：2015-06-17
IPC分类号： C25B1/00 , C01B17/06 , C01B17/22 , B01D53/52 , B01D53/78 , B01D53/73 , B01D53/14 , C01D7/00 , C01D7/12 , C25B1/16
摘要： Hydrogen sulfide is scrubbed from a gas stream to prepare dissolved alkali metal sulfide or hydrosulfide, which is used to prepare feed electrolyte solution for electrochemical processing to generate alkali metal hydroxide in catholyte and polysulfide in anolyte, which may be recovered from an electrochemical reactor and which may be subjected to further processing to precipitate elemental sulfur. Aqueous scrubbing solution may include alkali metal carbonate capture agent to capture hydrogen sulfide in alkali metal bicarbonate The gas stream may include carbon dioxide in addition to hydrogen sulfide, and a ratio of dissolved alkali metal carbonate to bicarbonate may be increased prior to electrochemical processing.
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公开(公告)号：US10208363B2
公开(公告)日：2019-02-19
申请号：US14650099
申请日：2013-12-05
申请人： SOLVAY SA
发明人： Alain Vandendoren
摘要： Process to produce sodium carbonate from an ore mineral comprising sodium bicarbonate; comprising: dissolving sodium carbonate particles having a mean diameter D50, measured by sieve analysis, less than 250 μm in a water solution; introducing the resulting production solution comprising sodium carbonate into less basic compartments of an electrodialyser comprising alternating less basic and more basic adjacent compartments separated from each other by cationic membranes; producing a solution comprising sodium hydroxide is produced into the more basic compartments; extracting the solution comprising sodium hydroxide from the more basic compartments of the electrodialyser and used to constitute a reaction solution; and putting the reaction solution into contact with the mineral ore comprising sodium bicarbonate in order to form a produced solution comprising sodium carbonate.
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公开(公告)号：US20180205122A1
公开(公告)日：2018-07-19
申请号：US15742511
申请日：2016-06-27
CPC分类号： H01M10/54 , C01D7/06 , C01D7/12 , C01G51/04 , C01P2004/60 , C01P2004/80 , C01P2006/80 , C22B1/005 , C22B7/006 , C22B26/12 , Y02P10/234 , Y02W30/84
摘要： The present invention relates to an improved process and method of recovering metals of value from used Lithium Ion batteries. More particularly, the invention provides a method for recovering cobalt and lithium along with other metals of value wherein the method majorly includes physical processes for separation, limiting the use of chemical for removing minor impurities. Majority of elements were separated by physical process instead of chemical process which gives the benefit of cost saving in chemical treatment of liquid and solid effluents. Chemicals are used to dissolve only minor impurities from electrolyte which lead to the process economically attractive. This makes the method of recovering metal values is environment friendly. The invention provides for a cost effective, economic and environmental friendly process for recovering metals of value.
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公开(公告)号：US09868644B2
公开(公告)日：2018-01-16
申请号：US14367737
申请日：2012-12-19
申请人： SOLVAY SA
发明人： Joffrey Piet , Frederic Nicolas
摘要： Process for producing sodium carbonate and sodium bicarbonate in a continuous mode out of trona comprising: c) feeding crushed trona, an extraction water and an additive in a first leaching tank containing a dissolution solution comprising sodium carbonate and sodium bicarbonate, wherein the additive is selected from the group consisting of: anionic hexametaphosphate, anionic polyphosphate, anionic polyphosphonate, soja lecithine, anionic polycarboxylate polymer, anionic polyacrylate polymer, anionic polyacrylate-polyacrylamide co-polymer, anionic hydrolyzed polymaleic polymers, anionic maleic-acrylic acids copolymers, anionic acrylic acid-phosphonic acid copolymers and combinations thereof; d) dissolving at least partially the crushed trona in the dissolution solution in order to produce a first suspension; e) removing continuously the first suspension from the first leaching tank and feeding it with an additive into a second leaching tank wherein the additive is selected from the same group of additives of step c); f) dissolving at least partially the remaining crushed trona from step d) in the second leaching tank in order to produce a second suspension; g) separating the second solid particles from the second solution to produce a production solution comprising sodium carbonate and to produce a production solid comprising the second solid particles comprising sodium bicarbonate.
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10.发明申请公开(公告)号：US20170120188A1
公开(公告)日：2017-05-04
申请号：US15317649
申请日：2015-06-10
申请人： SOLVAY SA
发明人： Marc THIJSSEN
CPC分类号： B01D53/508 , B01D53/685 , B01D2251/304 , B01D2251/606 , C01D7/123 , Y02C20/30
摘要： Process for the production of reactive composition particles comprising at least 60% by weight of sodium carbonate and having a BET specific surface of at least 4 m2/g, according to which particles based on sodium bicarbonate and/or sodium sesquicarbonate having a median particle size D50 of less than 35 μm are brought into contact with a stream of hot gases having a temperature of at least 100° C. in order to convert the sodium bicarbonate into sodium carbonate by calcination, the stream of hot gases comprising calcined particles subsequently being subjected to a separation stage in order to obtain, on the one hand, the reactive composition particles and, on the other hand, a separated stream of hot gases comprising CO2 and steam, the separated stream of hot gases being at least partly recycled upstream of the separation stage.
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