Class 423/186 - Carbonating

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes including the step of chemically forming a compound
No. of patents: 37
Last issue date: 09/18/2007

Number	Title	Issue Date
7270726	Method for the production of green liquor The method is for production of green liquor in association with a causticizing process during recovery of chemicals in manufacture of sulphate pulp. A smelt (14) of chemicals principally consisting of Na2S and Na2CO3 from a soda boiler ...	09/18/2007
7214355	Production of lithium compounds directly from lithium containing brines Metal carbonates that are insoluble in water but that have a corresponding metal biocarbonate salt that is more than 75% by weight soluble in water are purified by preparing an aqueous slurry of the metal carbonate: introducing carbon dioxide gas to form a correspon...	05/08/2007
7186394	Retarding agents for preparing purified brine The invention relates to a process to produce brine of improved purity wherein a salt source, contaminated with sulphate ions and alkaline (earth) metal ions, is dissolved in water in the presence of an effective amount of a retarding agent comprising at least one l...	03/06/2007
7157065	Production of lithium compounds directly from lithium containing brines A continuous process for directly preparing high purity lithium carbonate from lithium containing brines by preparing a brine containing about 6.0 wt % lithium and further containing other ions naturally occurring in brines; adding mother liquor containing carbonate...	01/02/2007
7101519	Zirconium basic carbonate and methods of making the same Methods of making zirconium basic carbonate are further described which involve titrating an aqueous slurry of sodium zirconium carbonate to a pH of from about 3.5 to about 4.0 with an acidic agent wherein the sodium zirconium carbonate has a moisture content of fro...	09/05/2006
7077968	Method for continuously filtering raw brine for use in chlor-alkali electrolysis The method of continuously processing raw brine with a solids content to obtain substantially solids-free pure brine (E) for use in chlor-alkali electrolysis. In this method the raw brine (A) is separated, by means of a decanter (1), into a clear brine (B) wi...	07/18/2006
7041267	Granular sodium carbonate obtained by fluid-bed spray granulation and a process for its production The invention relates to a process for the production, by fluid-bed spray granulation, of granular sodium percarbonate having a low TAM value. According to the invention, in the fluid-bed spray granulation, an Mg compound in a quantity of 50 to 2,000 ppm, in particu...	05/09/2006
6955695	Conversion of petroleum residua to methane This invention discloses improvements on previous inventions for catalytic conversion of coal and steam to methane. The disclosed improvements permit conversion of petroleum residua or heavy crude petroleum to methane and carbon dioxide such that nearly all of the h...	10/18/2005
6835228	Process of recovering valuable metals from waste secondary batteries A process of recovering metals from waste lithium ion/Ni—H/Ni—Cd batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The process includes subjecting the ash to a first dissolution etching treatmen...	12/28/2004
6749825	Mesoporous carbonates and method of making Mesoporous metal carbonate structures are formed by providing a solution containing a non-ionic surfactant and a calcium acetate salt, adding sufficient base to react with the acidic byproducts to be formed by the addition of carbon dioxide, and adding carbon dioxid...	06/15/2004
6514311	Clean process of recovering metals from waste lithium ion batteries A process of recovering metals from waste lithium ion batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The invented process includes subjecting the ash to a dissolution etching treatment...	02/04/2003
6475458	Method for formulating food grade sodium bicarbonate There is disclosed a method for formulating food grade sodium bicarbonate by purification of a sodium bicarbonate liquor where an initial saturated feedstock of sodium bicarbonate which contains sodium sulfate as an impurity is filtered to remove the impu...	11/05/2002
6337132	Layered rock salt-type oxide particle powder and process for producing the same The present invention provides a lithium nickel-layered rock salt-type oxide particle powder, a lithium cobalt-layered rock salt-type oxide particle powder or a particle powder of a solid solution of these layered rock salt-type oxides, wherein the surfac...	01/08/2002
5993759	Production of lithium carbonate from brines Lithium carbonate can be efficiently produced from a brine by (i) removing the boron therefrom, (ii) diluting the boron-free brine, (iii) removing magnesium from the diluted brine, and (iv) adding sodium carbonate to thereby precipitate lithium carbonate....	11/30/1999
5785868	Method for selective separation of products at hydrothermal conditions Sodium and borate ions are separated in supercritical water by addition of dissolved CO2 to cause precipitation of carbonates and the formation of boric acid. Carbonates and boric acid are then recovered as separate products....	07/28/1998
5624647	Method for recovery of alkali values from trona using two-stage leaching A process for recovering alkali values from trona ore by partially dissolving trona in a first dissolving solution to form a first feed liquor and undissolved trona. The first feed liquor is cooled and sodium carbonate decahydrate is precipitated. The sod...	04/29/1997
5348689	Molten salt destruction of alkali and alkaline earth metals A process for destroying alkali metal and alkaline earth metal-containing wastes, such as sodium, by feeding such waste into a molten bath containing a molten salt such as sodium carbonate, or a mixture of salts having a lower melting point, such as a mix...	09/20/1994
5221528	Process for the preparation of sodium chloride In a purification process for brine, impurities such as calcium, magnesium and/or sulphate are precipitated by the addition of calcium hydroxide (Ca(OH)2) and sodium carbonate (Na2 CO3). Following NaCl crystallization by e...	06/22/1993
5219541	Sodium hydroxide production with a calcium carbonate seed crystal Disclosed is a method of producing sodium hydroxide comprising the steps of: (a contacting trona ore and sodium hydroxide under conditions suitable to form sodium carbonate; (b) removing essentially all solids larger than 32 mesh from the sodium carbonate...	06/15/1993
5202062	Disposal method of radioactive wastes The present invention adds carbonates or chlorides of alkaline earth metals to the radioactive wastes containing sodium sulfate and subjects sulfate group in the radioactive wastes to reduction treatment, thereby converts the sulfate group into sulfides o...	04/13/1993
4654204	Production of sodium bicarbonate by reversion of soda-type feed salt Sodium bicarbonate is produced by introducing solid sodium carbonate, sodium sesquicarbonate, and/or Wegscheider's salt into a reversion slurry, saturated with respect to bicarbonate and containing at least 10 wt. % solids, to effect rapid and complete co...	03/31/1987
4581207	Recovery of aluminum from spent liquor A process for the purification of spent liquor from an alumina precipitation stage is disclosed wherein the spent liquor is first contacted with 50 volume % or less ethanol to form a sodium oxalate precipitate and the, after removal of the sodium oxalate ...	04/08/1986
4563340	Process for the secondary obtention of sodium carbonate from FLP waste liquor This invention is related to a process for the secondary obtention of sodium carbonate from a waste liquor (known as FLP waste liquor) containing principally sodium chloride, ammonium bicarbonate, ammonium chloride and carbon dioxide, which is obtained in...	01/07/1986
4464347	Recovery of aluminum from spent liquor In accordance with the invention, spent liquor from an alumina precipitation stage is contacted with an extraction fluid to separate the mixture into a first layer comprising the extraction fluid and at least a portion of the caustic from the spent liquor...	08/07/1984
4277447	Process for reducing calcium ion concentrations in alkaline alkali metal chloride brines A process for reducing calcium ion concentration in alkaline alkali metal chloride brines containing an alkali metal hydroxide is disclosed. The process comprises admixing an alkali metal bicarbonate with the alkaline brines to form an insoluble calcium s...	07/07/1981
4239996	Potassium carbonate recovery A process for reacting potassium carbonate with the sulfur in an MHD gas to form potassium sulfate and for recovering the potassium carbonate for recycle as a seeding material for the MHD gas....	12/16/1980
4115219	Brine purification process In a process for purifying raw brine containing dissolved strontium, calcium and magnesium impurities wherein the raw brine is treated by contacting the brine with sodium carbonate for precipitation of strontium and calcium carbonate, contacting the brine...	09/19/1978
4088451	Concentration of underground brines in situ by solar evaporation A process is provided for the recovery of chemicals, such as chlorides, sulfates, carbonates and borates of such alkali metals as sodium and potassium, among others, from underground brines associated with an ore body containing said chemicals, wherein th...	05/09/1978
4072472	Production of high purity salt from high sulfate salt deposits A subterranean salt deposit is solution mined, and the resulting calcium- and sulfate-contaminated brine is treated, e.g., by soda ash, to precipitate insoluble calcium compounds. The resulting slurry is settled, and the effluent clear brine is evaporated...	02/07/1978
4046865	Process for producing sodium chloride brines suitable for electrolysis Contacting rock salt containing at least one member of the group consisting of anhydrite and calcium sulfate as an impurity with an aqueous sodium chloride solution initially containing from about 200 to about 300 g/l of sodium chloride and having a calci...	09/06/1977
4044097	Recovery of soda values from sodium carbonate crystallizer purge liquors Soda values from the crystallizer mother liquor purge in the process of making sodium carbonate from trona are recovered by (1) mixing the purge with treating agent of magnesium oxide, aluminum oxide, bauxite, certain fine particle size calcined trona, in...	08/23/1977
4039617	Recovery of soda values and heat from sodium carbonate crystallizer purge liquors Soda values from the crystallizer purge liquor from the process of making sodium carbonate from trona are recovered by cooling the purge liquor to temperature below about 32° C. to effect crystallization of sodium carbonate decahydrate crystals therefrom...	08/02/1977
4039618	Treatment of sodium carbonate crystallizer mother liquors In the process for making sodium carbonate from trona, the soluble silicate content of crystallizer mother liquor from which sodium carbonate precursor crystals are obtained by evaporative crystallization is reduced by digesting the mother liquor at eleva...	08/02/1977
4022871	Process for the fabrication of sodium bicarbonate and boric acid from borosodium ores Process for the fabrication of boric acid by carboammoniac attack of a borate mineral, involving subjecting a borosodium ore, in its natural state or previously refined, and in a finely ground condition, to a treatment in an aqueous medium with carbonic a...	05/10/1977
4005061	Method for recovering potassium hydroxide and zinc oxide from potassium zincate solutions Method for recovering potassium hydroxide and zinc oxide from potassium zincate solutions, characterized in that a selective solvent of potassium hydroxide, which is miscible with water, is added to the zincate solution, in that the zinc oxide precipitate...	01/25/1977
3966541	Concentration of underground brines in situ by solar evaporation A process is provided for the recovery of chemicals, such as chlorides, sulfates, carbonates and borates of such alkali metals as sodium and potassium, among others, from underground brines associated with an ore body containing said chemicals, wherein th...	06/29/1976
3949052	Process for the treatment of carburizing salt wastes This invention relates to a process for the treatment of the reaction mass produced during the joint elimination of barium-containing nitrite-/nitrate-bearing carburizing salt wastes and cyanide-/cyanate-bearing wastes by ignition of the dry mixture at el...	04/06/1976

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Class 423/186 - Carbonating