Class 423/202 - Treating with acid or acid salt

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes including the step of using a compound which yields
No. of patents: 31
Last issue date: 01/29/2008

Number	Title	Issue Date
7323150	Methods for recovering at least one metallic element from ore A method for recovering at least one metallic element from ore or other material is described and includes reacting ore or other material with a salt capable of recovering the metallic element from the ore or other material to form a reaction product that includes t...	01/29/2008
7078009	Lepidocrocite type lithium potassium titanate, method for preparation thereof, and friction material Lepidocrocite lithium potassium titanate characterized as having a composition represented by the formula K0.5-0.7Li0.27Ti1.73O3.85-3.95, and preferably having an arithmetic mean of major and minor diameters of 0.1–100 �...	07/18/2006
6911188	Production of two alkali metal salts by a combined ion exchange and crystallization process The invention relates a process for producing an alkali metal nitrate and an alkali metal phosphate in the same process from a phosphate raw material and a nitrate raw material comprising the steps of: a) reacting the phosphate raw...	06/28/2005
6419887	Process for the treatment of residual liquors from the ammoniation and carbonation of alkali metal salts A process for the treatment of residual liquors from the ammoniation and carbonation of alkali metal salts containing ammonium salts, sodium salts, soluble sodium bicarbonate, ammonium bicarbonate and water and producing purified ammonium salts, comprisin...	07/16/2002
6409978	Method of removing impurities from mineral concentrates A process for removing impurities contained in the crystal lattice of minerals, comprising the steps of forming a mixture of a mineral capable of structurally reorganizing its crystal lattice which contains an impurity in its crystal lattice and a halogen...	06/25/2002
6090353	Method of removing impurities from mineral concentrates A process for removing impurities contained in the crystal lattice of minerals, comprising the steps of forming a mixture of a mineral capable of structurally reorganizing its crystal lattice which contains an impurity in its crystal lattice and a halogen...	07/18/2000
6053963	Method for treating rotary slag The present invention provides a method for treating rotary slag containing iron and sodium compounds. The method involves treating the slag in a sulfuric acid solution to convert the iron and sodium within the slag to iron sulfate and sodium sulfate. The...	04/25/2000
5846501	Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate In order to recover in an environmentally sound and economic manner used hardening shop salts which contain nitrate-nitrite, the salts, comminuted to particle sizes of from 1 to 50 mm, are dissolved in a mixture of nitric acid and hydrogen peroxide withou...	12/08/1998
5575957	Acicular electroconductive tin oxide fine particles and process for producing same The invention provides acicular electroconductive tin oxide fine particles which has a mean diameter of 0.005-1 μm and a mean length of 0.05-10 μm and an aspect ratio of 3 or higher. The invention further provides a process for producing the acicular el...	11/19/1996
5567401	Method of producing stable metal oxides and chalcogenides and power source A method of making chemically and electrochemically stable oxides or other chalcogenides for use as cathodes for power source applications, and of making batteries comprising such materials....	10/22/1996
5487880	Production of sodium-22 from proton irradiated aluminum A process for selective separation of sodium-22 from a proton irradiated minum target including dissolving a proton irradiated aluminum target in hydrochloric acid to form a first solution including aluminum ions and sodium ions, separating a portion of ...	01/30/1996
5482687	Separation of sodium-22 from irradiated targets A process for selective separation of sodium-22 from an irradiated target including dissolving an irradiated target to form a first solution, contacting the first solution with hydrated antimony pentoxide to selectively separate sodium-22 from the first s...	01/09/1996
5356567	Lithium aluminum complex hydroxide salt stabilizer for resins A stabilizer for resin, which is composed of a lithium aluminum complex hydroxide salt represented by the following formula Al2 Li(OH)6)n X.mH2 O . . . (1) wherein X is an inorganic or organic anion, n is a valence number...	10/18/1994
5310419	Method of preparing inorganic polymeric water complexes and products so produced The present invention provides aqueous processes which create new chemical compositions of matter prepared by reacting, in the presence of aqueous ammonia or other source of reactive NH2 groups, an alkali metal hydroxide to raise pH above 12, a...	05/10/1994
5271911	Method for removing potassium from molybdenum trioxide An improved method for substantially removing potassium from potassium-bearing molybdenum trioxide involves the use of a leach solution in a weight ratio of seven parts of the leach solution to one part molybdenum trioxide at a temperature of at least 90�...	12/21/1993
5110578	Continuous production of potassium nitrate via ion exchange Potassium nitrate is produced by contacting nitric acid with a potassium loaded strong cationic exchange resin. In a preferred embodiment, a solution of potassium nitrate and dilute nitric acid is produced in a continuous liquid solid contacting apparatus...	05/05/1992
4938934	Recovery of cesium chloride from pollucite ore A process for recovering purified cesium chloride from a cesium aluminum silicate ore in which the ore is digested with aqueous hydrochloric acid and the silica solids removed to obtain an aqueous acidic digest solution of metal chlorides consisting of ce...	07/03/1990
4844880	Process for the manufacture of sodium metabisulfite An improved process for the manufacture of sodium metabisulfite is provided. In this process, the chemical reaction forming sodium bisulfite solution is carried out separately from the crystallization of sodium metabisulfite. The crystallization step is c...	07/04/1989
4777030	Process for recovery of silicon from a reaction mixture A process is described for the recovery of silicon from a reaction mixture comprising silicon and an alkali metal fluoride....	10/11/1988
4775546	Process for treating potassium chloride A process for treating potassium chloride, wherein the potassium chloride is dissolved in an aqueous medium and resulting solution is heated to evaporate water contained therein....	10/04/1988
4751066	Process for preparing alkali metal phosphate Alkali metal phosphates are recovered from a water immiscible solvent solution of aqueous wet process phosphoric acid by neutralizing the acid with a basic alkali metal salt in a ratio of alkali metal to phosphorus of 1 to 3.5 to form at least the mono al...	06/14/1988
4655828	Separation of metallic lithium Lithium metal is separated from lithium salts in spent torpedo boiler fuel by solubilizing said salts in a solution of a Lewis acid such as boron trifluoride in a polar solvent such as 1,2-dimethoxyethane followed by subsequent separation of the constitue...	04/07/1987
4465568	Electrochemical production of KNO₃ /NaNO₃ salt mixture A process for the electrolytic production of a chloride-free mixture consisting essentially of sodium and potassium nitrates is disclosed. In this process, an anolyte brine comprised of a mixture of sodium and potassium chlorides dissolved therein is elec...	08/14/1984
4428912	Regeneration of chloridizing agent from chlorination residue Alkali and alkaline earth metal chlorides contained in a residue of a chlorination process of a feed material of bauxite or clay associated with coal are removed by the addition of sulfuric acid which causes their conversion to their sulfate form, and the...	01/31/1984
4304760	Method of removing potassium hydroxide from crystallized potassium ferrate (VI) Potassium ferrate (VI), K2 FeO4, which has been crystallized from a concentrated aqueous solution of KOH is washed with an aqueous solution of a potassium salt of an inorganic acid to remove the residual KOH. The wash solution is at ...	12/08/1981
4161511	Process of refining sodium hexafluorosilicate Crude sodium hexafluorosilicate containing gypsum and various metal phosphates is refined into highly pure and sufficiently large crystals. First, the crude fluorosilicate is treated with a sodium chloride solution to dissolve gypsum. Then the solid phase...	07/17/1979
4026676	Process for producing salt having a reduced calcium sulfate content A process for preparing from aqueous NaCl brine containing appreciable quantities of dissolved calcium sulfate high purity dendritic salt, characterized by an exceptionally low calcium sulfate content. The process is carried out by a "feed and bleed" proc...	05/31/1977
3985567	Method of treating bauxite waste red mud with acid and making construction bricks from the treated material Bauxite waste red mud is treated with hydrochloric acid to dissolve only the sodium content. The treated material is mixed with kaolinitic clay and formed into construction bricks....	10/12/1976
3984312	Process for insolubilizing potentially water pollutable wastes from sodium or ammonium type sulfur dioxide air pollution control systems Process for insolubilizing water soluble wastes from alkaline sodium or ammonium type sulfur dioxide control systems used in conjunction with industrial or power plants. The sodium or ammonium sulfite or sulfate wastes are reacted in solution with ferric ...	10/05/1976
3981964	Sodium sulphate compositions and their production Chrome saltcake has stable free flowing properties imparted to it by subjecting the sodium dichromate impurity present in chrome saltcake to reaction to form a product that is less susceptible to absorption of moisture than sodium dichromate....	09/21/1976
3956464	Preparation of phosphates Potassium phosphates useful as fertilizer materials, are produced by the reaction of phosphate rock or a solubilized form thereof, concentrated sulfuric acid and potassium hydrogen sulfate wherein the potassium hydrogen sulfate is added in a controlled ma...	05/11/1976

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Class 423/202 - Treating with acid or acid salt