Class 423/52 - Sulfating

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Process including the step of forming a compound containing
No. of patents: 27
Last issue date: 01/01/2008

Number	Title	Issue Date
7314604	Stable ferric arsenate precipitation from acid copper solutions whilst minimising copper losses A method of which includes the steps of introducing an acidic solution containing (V), copper, ferric iron and ferrous iron into a first tank of a series of continuously stirred tank reactors and, in the first tank, adding air to the solution; heating the solution t...	01/01/2008
6846346	Sulfatization process for metal extraction from sulfide ores The invention provides a hydrometallurgical process for treating metal-containing sulfide ores and concentrates, comprising reacting said metal-containing sulfide with concentrated sulfuric acid at a temperature of between about 300° C. and 400° C. in the presence...	01/25/2005
6476287	Sulfite treatment of spent industrial wastes A method of treating metal-contaminated spent foundry sand, or other industrial waste, by combining the sand with a sulfite to produce insoluble metal sulfur oxide complexes that do not leach from the sand. The treated waste may also be processed to reduc...	11/05/2002
6245240	Treatment of a solution containing iron salts Provided herein is a process for treatment of solutions which contain ferrous, ferric and soluble manganese species which process comprises addition of an oxidizing agent to such a solution to cause formation of manganese dioxide particles and adding mang...	06/12/2001
5614177	Dentifrice-compatible silica particulates Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment, silica particulates have a unique surface chemistry as to be at least 50% compatible with zinc valu...	03/25/1997
5597664	Lithium manganese oxide compound and method of preparation A method for manufacturing Li2 Mn2 O4 which comprises the steps of providing LiMn2 O4 ; providing a lithium salt; forming a solution or suspension of the LiMn2 O4 and lithium salt in ...	01/28/1997
4943418	Method of preparing high-purity manganese compounds In a method of preparing high-purity manganese compounds, wherein the method comprises adding a member selected from ferromanganese and metallic manganeses to an aqueous electrolyte-containing solution, dissolving said member while stirring and maintainin...	07/24/1990
4872909	Process for acid leaching of manganese oxide ores aided by hydrogen peroxide A method of processing manganese ore by adding the ore to an aqueous solution of acid and H2 O2 to form a leach pulp. The leach pulp is agitated for a predetermined time period at predetermined temperatures. The leach pulp is then se...	10/10/1989
4765827	Metal value recovery A process for at least one of (1) recovering at least one first metal other than manganese from a first ore containing reducible manganese, and (2) recovering at least one second metal from a second ore containing the second metal and at least one metal s...	08/23/1988
4718995	Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material A process is disclosed for recovering scandium from a tungsten bearing material containing tungsten, iron manganese and scandium. The process involves digesting the material in an aqueous solution selected from the group consisting of a saturated solution...	01/12/1988
4698139	Hydrometallurgical method for treating valuable metal raw materials containing chlorides and fluorides The purpose of the method is to remove chlorides and fluorides from a valuable metal raw material by leaching the raw material into sulphuric acid solution and by crystallizing the valuable metal sulphate selectively out of the solution. The valuable meta...	10/06/1987
4624703	Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material A process is disclosed for recovering tungsten, scandium, iron, and manganese from tungsten bearing material. The process involves digesting the material in sufficient sulfuric acid at a sufficient temperature for a sufficient time in the presence of a re...	11/25/1986
4620964	Process for the treatment of complex manganese ores, such as marine nodules A process for the treatment of a complex manganese ore, wherein it comprises the following stages: (a) crushing the ore, (b) subdividing the crushed ore into a first part and a second part, (c) preparing the first pulp from the first part of the crushed ore, (d) re...	11/04/1986
4610721	Two-stage leaching process for steel plant dusts A process is provided for selectively recovering zinc from steel plant dust containing substantial amounts of iron. The process comprises atmospherically leaching the steel plant dust in a first stage wherein an amount of steel plant dust is mixed with an...	09/09/1986
4599223	Separation of tungsten from rhenium A process is disclosed for separating tungsten from a solution containing tungstate and perrhenate ions. The process involves reacting a sufficient amount of hydrochloric acid with the solution at a sufficient temperature to form a solid containing essent...	07/08/1986
4594102	Recovery of cobalt and nickel from sulphidic material A process for recovering cobalt and nickel values from cobalt and nickel containing sulphidic material also containing iron includes roasting the sulphidic material to produce a calcine containing water soluble cobalt and nickel sulphate, and leaching the...	06/10/1986
4551254	Macroporous manganese dioxide water purifier A water purifier consisting essentially of manganese dioxide particles having a 20 to 48 mesh size and macroscopic pores which are so large in size as to permit passage of water therethrough. The particles may have active sites of needle-like or columnar ...	11/05/1985
4489043	Manufacture of manganous sulfate solutions Manganese sulfate solutions of improved purity are prepared by digesting a combination of a reduced manganese ore with an aqueous acid solution in the presence of a particulate potassium-iron salt byproduct. The salt byproduct is the salt byproduct formed...	12/18/1984
4485073	Process of producing manganese sulfate solutions A process for preparing manganese sulfate solutions having reduced concentrations of potassium impurity is disclosed wherein a digestion mixture of a reduced manganese ore, a source of water soluble aluminum ions, a source of water soluble ferric ions and...	11/27/1984
4483828	Method of producing manganese sulfate solutions of improved purity A process for the preparation of manganese sulfate solutions having reduced levels of potassium impurity comprising blending a reduced manganese ore, an added source of water soluble aluminum ions and an aqueous acid solution to form a digestion mixture, ...	11/20/1984
4239737	Method for removing sulfur dioxide Sulfur dioxide is removed from waste gases generated in a thermoelectric plant by contacting the gases countercurrently with an aqueous alkaline solution having a pH of about 9-12 and containing both sodium hydroxide and manganic hydroxide, whereby the su...	12/16/1980
4202797	Recovering catalyst values in reaction liquors from oxidative production of carboxylic and polycarboxilic acids Heavy metal values are recovered from mother liquors remaining from oxidations to mono- or poly- carboxylic acids in aliphatic monocarboxylic acids in presence of catalyst heavy metals and bromides by (1) concentrating, (2) precipitating and (3) separatin...	05/13/1980
4198377	Process for recovering manganese from aqueous acidic sulphate solutions The present invention relates to a process for the recovery of manganese from aqueous acidic solution. The process comprises the steps of, (a) introducing into the solution peroxymonosulphuric acid (PMS) in a plurality of stages, normally from 2 to 6, oft...	04/15/1980
4029734	Recovery of chromium values Chromium values may be recovered from the chromium bearing ores or sources by subjecting the chromium bearing source to a roast in the presence of sulfuric acid and an oxidant which contains manganese compounds at temperatures ranging from about 200° to ...	06/14/1977
4028463	Recovery of manganese values Manganese values may be recovered from manganese bearing sources by subjecting said source to a roast in the presence of sulfuric acid and a reductant which comprises a chromium-containing compound at temperatures ranging from about 200° to about 500° C...	06/07/1977
4008306	Method of recovering manganese values from a mixture obtained by catalytically oxidizing a paraffin with gaseous oxygen When paraffins having a chain of 10 - 40 carbon atoms are reacted with gaseous oxygen in the presence of a manganese bearing catalyst, manganese is present in the oxidation mixture partly as a solute in the liquid mixture, and partly as a sludge. When the...	02/15/1977
4002469	Separation of metals This invention relates to refining platinum group metal concentrate and the separation therefrom of silver and the majority of base metals which are present in them. In more detail, the process comprises the steps of: A. contacting a solid particulate mixture ...	01/11/1977

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Class 423/52 - Sulfating