Class 423/142 - Agitating during reaction

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes wherein the mixture is agitated or vibrated while
No. of patents: 35
Last issue date: 11/13/2007

Number	Title	Issue Date
7294434	Nickel Hydroxide electrode material with improved microstructure and method for making the same Nickel hydroxide material comprising particles with a microstructure including crystallites of less than 103 Å as measured in the 101 direction by x-ray diffraction. A method of making positive electrode material for use in an alkaline rechargeable electroc...	11/13/2007
7294319	Method for precipitating iron from a zinc sulphate solution as hematite This invention relates to a method for the removal of iron as hematite from a zinc sulphate solution in atmospheric conditions during the electrolytic preparation of zinc. According to the method, the pH of the iron-containing solution is adjusted to a value of at l...	11/13/2007
7144561	Method for the preparation of iron hydroxide, iron oxide hydrate or iron oxide from filter salts of dilute acid recovery Described is a method for the manufacture of iron hydroxide, iron oxide hydrate or iron oxide from filter salts from thin acid recovery, in which the filter salts are dissolved in water, the solution is adjusted to a pH of	12/05/2006
7141227	Apparatus and method for preparing cerium oxide nanoparticles This invention provides a method for preparing cerium oxide nanoparticles with a narrow size distribution. The cerium oxide nanoparticles obtained by the method of the invention are nearly all crystalline. The method comprises providing a first aqueous solution comp...	11/28/2006
7018605	Sulfidation reaction control method A method of sulfidation removal of zinc using hydrogen sulfide is provided, desirably at a temperature at 60° C. or lower, wherein in a container that is pressurized at 0.1 MPa or less with respect to atmospheric pressure, by making the pH of the solution 1.5 to 4....	03/28/2006
6949232	Producing cobalt (III) hexammine sulfate from nickel cobalt sulfides There is provided an improvement in a process for producing cobalt (III) hexammine sulphate which process comprises oxidatively pressure leaching nickel cobalt sulphides in an ammoniacal ammonium sulphate solution. The nickel and cobalt sulphides are oxidized to sul...	09/27/2005
6811758	Precipitation process The present invention relates to a process for inducing homogeneous precipitation of a metal oxide, wherein said metal is capable of existing in at least two cationic oxidation states, which process comprises the steps of: i) providing an aqueous solution of a metal...	11/02/2004
6800396	Nickel hydroxide coated with cobaltous hydroxide A nickel hydroxide for rechargeable batteries which is provided with a cobalt hydroxide coating which is stable to oxidation is described. The stability to oxidation is achieved by covering the surface of the cobalt hydroxide layer with anions of weak inorganic oxyg...	10/05/2004
6800260	Processes for treating iron-containing waste streams Processes for treating iron containing waste streams are provided. According to these processes, metal-containing compounds, particularly iron oxides are produced. These methods may, for example, be used in the processing of the waste streams from the chlorination o...	10/05/2004
6767529	Process for producing magnetite particles This invention relates to a process for producing magnetite particles having a coercivity of 6.366 kA/m to 10.345 kA/m (=80 to 130 Oe) and an octahedral particle shape, comprising heating an alkaline component and an iron(II) component in the form of an aqueous solu...	07/27/2004
6680035	Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores A hydrometallurgical process is provided for leaching nickeliferous laterite ores at temperatures below the boiling point of the pulp and at atmospheric pressure. The high iron fraction of the laterite, referred to as limonite, is first contacted with con...	01/20/2004
6596246	Process for producing stable cupric hydroxide and basic cupric salts Stable copper hydroxide is prepared by removing ferrous ion from the beginning cupric solution. The ferrous ion is oxidized to ferric ion, and the ferric ion is precipitated by raising the pH of the solution to 3-4. The utilization of phosphate ion both i...	07/22/2003
6576205	Method for reducing the crystallinity of nickel hydroxide powders A process for decreasing the crystallinity of nickel hydroxide by generating and supplying large numbers of heteronuclei into the nickel hydroxide producing reaction system. Nickel sulfate and sodium hydroxide are initially forcefully and intimately combi...	06/10/2003
6447650	Manufacturing method of CdS photocatalyst for hydrogen production and method for producing hydrogen by use of the same A method for preparing a CdS photocatalyst represented by general formula (I): m(a)/Cd[M(b)]S, comprising the steps of: dissolving Cd-containing and M-containing compounds in water in such an amount that the mol % of M ranges from 0.001 to. 20.00; adding ...	09/10/2002
6379637	Direct atmospheric leaching of highly-serpentinized saprolitic nickel laterite ores with sulphuric acid The present invention provides an atmospheric acid leaching process for leaching nickel and cobalt from highly-serpentinized saprolitic fractions of nickel laterite deposits that are generally too low in nickel to support economical extraction of their ni...	04/30/2002
6270738	Process for preparing usable products from an impure ferric sulfate solution The invention relates to a process for preparing a usable product, in particular a water treatment solution which contains ferric iron, from an impure ferric sulfate solution which contains as an impurity at least one other metal, the process comprising a...	08/07/2001
6139753	Method for treating acidic waste water The present invention relates to a method of treatment of acid waste waters or acid drainage waters containing metals comprising ferrous and ferric ions, the method comprising increasing the pH of the acid waste to at least 7.5 by addition of an alkaline ...	10/31/2000
5746994	Method for synthesizing ferrate and ferrate produced thereby A method of producing ferrate is disclosed, in which Fe3+ is oxidized with monoperoxosulfate (HSO5-) to form K2 FeO4 /K2 SO4. The isolation of the potassium ferrate (K2 ...	05/05/1998
5376342	Process for recovering zinc phosphating make-up feed from zinc phosphate sludge A process for recycling a zinc phosphating system sludge comprising forming a mixture of the sludge with water and phosphoric acid. The mixture is formed at an elevated temperature and a pH of between 1.5 and 2.4. The sludge substantially dissolves in the...	12/27/1994
5128047	Sequential separation of metals by controlled pH precipitation A process for separately removing zinc and iron from acidic wastewater. The process involves adding alkali metal hydroxide to the acidic wastewater (below about pH 4) to achieve a first pH of about 4.8 to at most about 5.4 and precipitate an iron hydroxid...	07/07/1992
5032367	Method for producing powdered iron oxide A method for producing a powdered iron oxide comprises the steps of adjusting the pH of a crude iron chloride solution to 2.5-4.5; reducing the P content of the solution by mechanical stirring or air bubbling and filtering; and oxidizing the solution into...	07/16/1991
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
4830836	Metal stripping system and an operation process therefor A metal stripping system and an operation process therefor which includes the following elements and steps. A main part of this system is a crystallization apparatus for metal stripping comprising a mixing zone of organic solvent and fluoride series strip...	05/16/1989
4594230	Recovery of cobalt A process is disclosed for recovering cobalt in a relatively pure form from an impure cobalt bearing material. The process involves digesting the material in hydrochloric acid to form a solution essentially all of the cobalt and some impurities and insolu...	06/10/1986
4572797	Method for removing trace pollutants from aqueous solutions A method of substantially removing a trace metallic contaminant from a liquid containing the same comprises, adding an oxidizing agent to a liquid containing a trace amount of a metallic contaminant of a concentration of up to about 10-1 ppm, the ...	02/25/1986
4229399	Process for pelletizing and neutralizing solid mixtures of metal chlorides A process is provided wherein solid mixtures of metal chlorides of, for example, ferric chloride, ferrous chloride, vanadium chloride and chromium chloride are (1) mixed with an alkaline material such as, for example, calcium oxide, calcium hydroxide and ...	10/21/1980
4208380	Process for the recovery of cobalt from its impure, aqueous, in particular nickel-bearing, solutions and catalyst therefor Cobalt is recovered as a finely-divided and anhydrous salt from impure, nickel-bearing, aqueous solutions of cobalt, by exposing the aqueous solution to oxidation at an elevated temperature in the presence of ammonia and the respective ammonium salt, the ...	06/17/1980
4186088	Aqueous ferrous waste conversion process An aqueous ferrous sulfate waste stream is converted into sludge and improved water effluent by a preferably ambient indoor temperature and pressure flow process comprising: turbulently mixing said stream with a substantial excess of gaseous oxygen and a ...	01/29/1980
4169053	Method of treating waste waters containing solid-phase difficultly-soluble compounds A method is provided for treating waste water containing solids of difficultly-soluble compounds of at least one heavy metal, the method comprising the steps of adding an amount of ferrous ions to said waste water corresponding on a molar basis to about 2...	09/25/1979
4118459	Chemically removing iron from grits Iron is removed from grits, e.g. crushed corundum by contacting the grits with aqueous hydrochloric acid for dissolving of the iron and provision of a suspension of the grits in the acedic aqueous medium; water is added to the suspension and it is then ce...	10/03/1978
4098870	Acid leaching of nickeliferous oxide ores with minimized scaling Nickel values contained in oxidic ores are recovered by leaching with sulfuric acid. The ore is slurried with water, preheated to a leaching temperature between about 230° C and about 300° C and the preheated slurry is fed to one or more vigorously agit...	07/04/1978
4057616	Metal hydroxide scintigraphic agents and method of preparation Metal hydroxides such as Fe(OH)2, Fe(OH)3 and Sn(OH)2 are prepared in the form of spherical particles of uniform and controlled size suitable for tagging with a radioactive element such as technetium-99m. Aqueous suspensio...	11/08/1977
4044096	Sulfuric acid leaching of nickeliferous laterite The leaching efficiency of nickeliferous lateritic ore is optimized by scalping the ore to remove a coarse low-nickel fraction and provide a fine nickel-rich fraction which is then high pressure leached in a sulfuric acid solution by controlling the param...	08/23/1977
4006215	Recovering iron, nickel, or cobalt from sulfate solution Sulfate solutions containing at least one valuable metal from the group: Fe, Ni and Co, particularly solutions resulting from the leaching of lateritic ores or concentrates, are treated to recover the valuable metal. The latter is precipitated by treating...	02/01/1977

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Class 423/142 - Agitating during reaction