Class 423/548 - Using metal sulfate as reactant

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes wherein a metal sulfate (SO₄^2-)
No. of patents: 25
Last issue date: 08/28/2007

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Number	Title	Issue Date
7261867	Production of silver sulfate grains using organo-sulfate or organo-sulfonate additives An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipita...	08/28/2007
6858562	Catalyst for decomposing organic harmful substances and method for decomposing organic halides by use thereof A catalyst of a water insoluble vanadyl sulfate or a complex catalyst, in which a specific oxide and a specific sulfate are combined to the water insoluble vanadyl sulfate are excellent not only in their activity, durability and SO2 resistance, not only i...	02/22/2005
6692716	Method of formulating alkali earth salts Methodology for formulating sodium bicarbonate and potassium sulfate. In one embodiment, sodium sulfate and ammonium bicarbonate are reacted to form sodium bicarbonate with the remaining liquor or brine treated with sulfuric acid to remove carbonates with...	02/17/2004
6610263	System and process for removal of pollutants from a gas stream System for removal of targeted pollutants, such as oxides of sulfur, oxides of nitrogen, mercury compounds and ash, from combustion and other industrial process gases and processes utilizing the system. Oxides of manganese are utilized as the primary sorb...	08/26/2003
6346222	Process for synthesizing a palladium replenisher for electroplating baths This invention provides a process of making a palladium replenisher comprising a complex of palladium tetraammine sulfate. The process includes distilling a palladium nitrate solution at a temperature maintained at or below about 115° C. Palladium sulfat...	02/12/2002
6217836	Recovering carbon, silica and alumina from spent potliner Spent potliner from aluminum reduction cells is treated, for example, with sulfuric acid to recover carbon, silica and alumina or to recover a vitrified product of silca and alumina....	04/17/2001
6106796	Method of ammonium sulfate purification A process is provided for recovering sodium bicarbonate and ammonium sulfate from a solution containing sodium sulfate derived from a process for removing sulfur contaminants out of a gas with sodium bicarbonate reagent. Sodium bicarbonate is precipitated...	08/22/2000
5830422	Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate A process for producing sodium bicarbonate and sodium carbonate. The process includes reacting within a reactor sodium sulfate in aqueous solution with ammonia and carbon dioxide to precipitate sodium bicarbonate and form a first mother liquor. The sodium...	11/03/1998
5654351	Method for sodium carbonate compound recovery and formation of ammonium sulfate There is disclosed a process for recovering sodium bicarbonate and forming ammonium sulfate from a source containing sodium sulfate. The method involves contacting the sodium sulfate in solution with carbon dioxide and a compound containing ammonia. Sodiu...	08/05/1997
5478545	Process for using reactions of gas/solid type in which the solid reactant contains an at least partially hydrated salt Process for using reactions of gas/solid type in which the solid reactant contains an at least partially hydrated salt. The process makes it possible to shift the position of the equilibrium line of the reaction under consideration and to reduce its slope in a...	12/26/1995
5266297	Liquid oxidizing method and apparatus A liquid oxidizing system has a closed circuit in which a liquid containing matter to be oxidized is circulated. The circuit is provided with an ejector for forming a jet stream of the liquid into which oxygen, or both oxygen and an oxidizing catalyst are...	11/30/1993
5262147	Basic composite metal sulfate fiber, process for the production thereof, and composition containing the same A novel basic composite metal sulfate fiber, a process for the production thereof, and a resin and/or rubber composition which contains the basic composite metal sulfate fiber and gives a molded article which is improved in mechanical strength and/or flam...	11/16/1993
5258168	Production of alunites Disclosed is a method for preparing high purity alunite. In the method, a material selected from the group consisting of sodium sulfate, sodium bisulfate, ammonium sulfate, ammonium bisulfate, potassium sulfate and potassium bisulfate is provided and reac...	11/02/1993
4935219	Process for obtaining ferric oxide and ammonium salts The process of the invention is carried out in gaseous phase by the action of ammonia on the aqueous solutions of iron salts in an appropriate reacting vessels....	06/19/1990
4822575	Process for the purification of zirconium compounds The invention concerns processes for the preparation of zirconium compositions which on calcination form zirconia. The zirconium compositions are prepared by the addition of an ammonia source to an aqueous zirconium sulfate solution to give a solution pH ...	04/18/1989
4385920	Granulation of potash salts A process for the granulation of potash salts to produce granules in high yield by the steps of mixing the potash salt with an inorganic phosphate binder and water, granulating the mixture and drying it....	05/31/1983
4192854	Process for removing hydrogen sulfide and ammonia from gaseous streams A process is described for the simultaneous removal of H2 S and ammonia from gaseous streams containing other acid and basic gases. The process comprises closed loop scrubbing of the gaseous stream with a copper sulfate-ammonium sulfate solutio...	03/11/1980
4150095	Recovering magnetite and ammonium sulphate from ammonium jarosite Ammonium jarosite is converted to hematite or magnetite and ammonium sulphate. The invention can be used for removing iron from a feed solution containing dissolved ferrous sulphate. The feed solution is treated with ammonium sulphate and oxygen to precip...	04/17/1979
4077794	Method for the manufacture of soil modifiers from waste materials of the manufacture of titanium dioxide A soil modifier comprising from 80 to 95% by weight of a mixture of ferric oxide and ferric sulphate in an oxide/sulphate weight ratio of from 0.25:1 to 1:1, is prepared by calcining at 500°-600° C in an oxidizing atmosphere a blend of by-product obtain...	03/07/1978
4071347	Novel composition for use in agriculture as soil improvers and fertilizers and process for their production Novel compositions for use in agriculture as soil improvers and fertilizers comprising as essential components ammonium sulfate and ferric oxide hydrate. By-products obtained in the production of titanium dioxide from ilmenite or ilmenite slag in the sulf...	01/31/1978
4058389	Process for the preparation of fertilizers and soil modifiers A soil modifying composition and a concentrated solution of ammonium sulphate with a high purity degree are obtained from by-products consisting essentially of ferrous sulphate heptahydrate, obtained in the production of titanium dioxide from ilmenites by...	11/15/1977
4045205	Method for the manufacture of soil modifiers from waste material of the manufacture of titanium dioxide Soil modifiers comprising from 80 to 95% by weight of a mixture of ferric oxide and ferric sulphate in an oxide/sulphate weight ratio of from 0.2:1 to 2:1 are prepared by calcining at 500°-600° C in the presence of an oxidizing gas a material consisting...	08/30/1977
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
3966891	Process for manufacturing sulfur from a solution of sodium sulfite A solution of sodium sulfite or sulfide is reacted with ammonium sulfate, so as to produce a gas containing SO2 or H2 S, NH3 and H2 O, which is thereafter treated for sulfur production and NH3 recover...	06/29/1976
3936292	Compositions for use in agriculture as soil modifiers and their method of manufacture Compositions useful in agriculture as soil modifiers and fertilizers are prepared by contacting the waste materials, obtained in the manufacture of titanium dioxide from ilmenites by the sulphate process, and which consist essentially of ferrous sulphate,...	02/03/1976

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Class 423/548 - Using metal sulfate as reactant