Class 75/359 - Reduction

Subclass of Class 75 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
Definition: Process in which a metal compound is reduced to free metal.
No. of patents: 48
Last issue date: 07/14/2009

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Number	Title	Issue Date
7559969	Methods and apparatuses for producing metallic compositions via reduction of metal halides The present invention is generally directed towards a method for producing a solid metallic composition by reacting a gaseous metal halide with a reducing agent are described. In one embodiment, the method includes reacting a gaseous metal halide with a reducing age...	07/14/2009
7407526	Food additive The invention concerns an iron powder for fortifying foodstuff. The powder consists of a reduced iron powder having irregularly shaped particles, wherein the iron powder has a ratio AD:PD less than 0.3, wherein AD is the apparent density in g/cm3, and PD ...	08/05/2008
7351271	Method of manufacturing niobium and/or tantalum powder A method of manufacturing niobium and/or tantalum powder consisting of: a first-stage reduction process of reducing niobium and/or tantalum oxides with alkali metals and/or alkaline-earth metals to obtain low-grade oxide powder represented by (NbTa) Ox, where x=0.06...	04/01/2008
7329303	Methods for producing titanium metal using grinding media Grinding media, including shaped media such as spheres or rods ranging in size from about 0.5 micron to 100 mm in diameter, are formed from a multi-carbide material consisting essentially of two or more carbide-forming elements and carbon, with or without carbide-fo...	02/12/2008
7175691	Method of producing stainless steel by re-using waste material of stainless steel producing process A method of producing stainless steel includes the steps of melting a raw material in an electric furnace to form molten steel, and then refining the molten steel by a refining furnace to produce stainless steel in a stainless steel producing process. In the method,...	02/13/2007
6918945	Method for producing sponge iron, and reduced iron powder and method for production thereof A method for manufacturing sponge iron includes heating iron oxide together with a solid reducing agent to reduce the iron oxide into sponge iron, wherein the iron oxide includes a mixture of powdered hematite and powdered iron ore or a mixture of powdered hematite ...	07/19/2005
6863707	Method of forming tungsten-coated W—Cu composite powder Disclosed is a method of forming a W—Cu composite powder having a Cu particle surrounded by tungsten by mixing and pulverizing tungsten oxide powder and copper oxide powder using turbular mixing or ball milling, reducing the Cu powder firstly at 200˜400° C. unde...	03/08/2005
6858060	Process for the production of composite components by powder injection molding, and composite powders suitable for this purpose The invention relates to a process for the production of metallic and metal-ceramic composite components by powder injection molding of a system comprising a metal composite powder, a binder and optionally a ceramic component, where the metal composite powder used i...	02/22/2005
6780255	Sm-fe-N based alloy powder and process for producing the same A magnetic powder of an Sm—Fe—N alloy, which has a mean particle diameter of 0.5 to 10 μm, and either an average acicularity of 75% or above or an average sphericity of 78% or above. The powder exhibits an extremely high residual magnetization and an extremely ...	08/24/2004
6638336	Manufacture of cost-effective titanium powder from magnesium reduced sponge The cost-effective titanium powder is manufactured by (a) magnesium-thermic reduction of titanium chlorides characterized by the formation of a hollow block of the reaction mass having an open cavity in the center of the block, (b) thermal-vacuum separati...	10/28/2003
6447571	Metal powder The present invention provides a metallic powder which exhibits superior sintering properties in a production of multilayer ceramic capacitors, and exhibits superior dispersion characteristics in forming of conductive pastes, thereby preventing delaminati...	09/10/2002
6168752	Process for producing metal powders and apparatus for producing the same A process for producing metallic powders a chlorination step for continuously producing chloride gas of metal by reacting metal with chlorine gas, and a reduction step for continuously reducing the metallic chloride gas by reacting the metallic chloride g...	01/02/2001
6152982	Reduction of metal oxides through mechanochemical processing The low temperature reduction of a metal oxide using mechanochemical processing techniques. The reduction reactions are induced mechanically by milling the reactants. In one embodiment of the invention, titanium oxide TiO2 is milled with CaH	11/28/2000
6113668	Process for manufacture of powder compact feed materials for fine grained hardmetal The manufacture of powdered feed materials for hard fine grained metal body production includes the reduction of metal oxides into powdered metal and the subsequent carburization into metal carbide. Processes currently used are very cost intensive, mainly...	09/05/2000
5882376	Mechanochemical process for producing fine WC/CO composite powder A mechanochemical process for producing fine WC/Co composite powder which is so small in WC grain size and in mean free path, and contains such a uniform distribution of WC and Co that its hard metal is superior in strength, compressive strength, TRS and ...	03/16/1999
5713982	Iron powder and method of producing such A method of producing iron powder comprises the step of providing a supply of iron oxide powder of a size less than 1000 microns which is then heated in a reducing agent atmosphere to a temperature between 1000° F. and 2100° F., thus resulting in the ir...	02/03/1998
5605585	Method for producing hydrogen storage alloy particles and sealed-type nickel-metal hydride storage battery using the same A method for manufacturing hydrogen storage alloy particles comprises steps of obtaining a melt of the hydrogen storage alloy and pulverizing the hydrogen storage alloy by water atomizing process, whereby the melt is pulverized by contacting or colliding ...	02/25/1997
5536294	Process for extracting precious metals from volcanic ore A process for extracting precious metal from volcanic ore includes the steps of crushing the ore, heating the ore in a hydrogen atmosphere to soften oxide mineral encapsulating the precious metal, cooling the ore, grinding the ore, and processing the ore ...	07/16/1996
5421854	Method for making palladium and palladium oxide powders by aerosol decomposition A method for the manufacture of finely divided particles of palladium, palladium oxide or mixtures thereof comprising the sequential steps: A. Forming an unsaturated solution of thermally decomposable palladium-containing compound in a thermally volatilizable ...	06/06/1995
5284614	Method of forming fine dispersion of ceria in tungsten Doped tungsten powder, or sintered tungsten bodies formed therefrom, having a fine dispersion of oxide particles of at least one metal from the group zirconium, hafnium, lanthanum, yttrium, and rare earth's are formed by the method of this invention. A mi...	02/08/1994
5248328	Process for preparing rare earth containing hard alloy This invention discloses a process for preparing rare earth containing hard alloy, comprising preparing metal carbide powder containing rare earth metals or cobalt powder containing rare earth metals by using wet coprecipitating method; according to the c...	09/28/1993
5196048	Process for preparing a vanadium-nickel-chromium master alloy A hydrogen battery alloy is prepared which is substantially free of inclusions of chromium by preparing a first precursor alloy or master alloy containing vanadium, nickel, and chromium using relatively equal amounts of vanadium and nickel and then adding...	03/23/1993
5185030	Method for producing extrafine pure metal powder A method of making extrafine pure elemental metal powder from a highly malleable pure elemental metal powder. The pure elemental metal powder is oxidized, ground to a desired average particle size, reduced in a reducing atmosphere to a pure elemental meta...	02/09/1993
5176741	Producing titanium particulates from in situ titanium-zinc intermetallic A process for producing salt free titanium powder by reacting zinc and a titanium halide in the presence of a reducing agent to form a solid zinc titanium product. Titanium halide vapor is introduced into a liquid alloy of zinc and the reducing agent at a...	01/05/1993
5173108	Method for controlling the oxygen content in agglomerated molybdenum powders A method is disclosed for producing an agglomerated molybdenum plasma spray powder with a controlled level of oxygen which comprises forming a relatively uniform mixture of agglomerated powders containing molybdenum dioxide and one or more ammonium-contai...	12/22/1992
4990307	Method for producing particles for the production of permanent magnets Particles for the production of permanent magents are obtained by producing an article having Ca and a rare earth oxide including at least Nd oxide. The article is heated to effect Ca rare earth oxide reduction. Thereafter, particles of -60 mesh or finer ...	02/05/1991
4767454	Process for the preparation of finely particulate chromium metal powder having a low oxygen content For preparing a chromium metal powder lacking in oxygen and having an average particle size not greater than 20 μm, a mixture of chromium oxide and calcium oxide, in a molar ratio of 1:0.5 to 1:2, is calcined initially at temperatures of 650° to 1,200°...	08/30/1988
4761177	Production of cobalt and nickel powder Fine cobalt or nickel powder is produced by hydrogen reduction of a sulfate solution in the presence of a base and a strong reductant such as a metal borohydride wherein the base is added stagewise to the solution with the initial addition of base being s...	08/02/1988
4747872	Process and apparatus for producing high purity iron Improved process and apparatus for the reduction of iron oxides employing a solid reducing agent. Particulate iron oxides are mixed with particles of the reducing agent and are subjected to high temperatures within a vessel made of refractory material whi...	05/31/1988
4664855	Method for producing amalgamable alloy A process for manufacturing an atomized amalgamable alloy having mold adaptation characteristics superior to other atomized alloys and comparable or better than those for ad-mixed type alloys (alloys which are mixtures of spherical and irregularly shaped ...	05/12/1987
4645535	Method for the recovery of precious metals from ores A process for the recovery of precious metals from ore containing the same is disclosed. The process includes the formation of a lixiviant solution including a thiourea compound, urea and potassium lignin sulfonate. The ore is then exposed to this lixivia...	02/24/1987
4645533	Tantalum powder and method of making The dielectric characteristic and resistance against the dielectric characteristic deterioration of tantalum powder for use in a solid electrolyte capacitor are improved by incorporating phosphorus and boron dopant sources into tantalum material at the re...	02/24/1987
4416688	Direct reduction of ores and concentration of metallic values The process for beneficiating iron ore, particularly high phosphorous iron ore, by controlled selective solid-state reduction in which the resultant sponge iron is produced in a malleable condition followed by ultrafine preferential grinding to form flake...	11/22/1983
4363652	Process for the production of high purity iron powder The removal of silica from an iron-bearing source which is treated to produce an iron powder which may be used in powder metallurgical applications may be facilitated by subjecting the reduced iron-bearing source such as magnetite to a sparge with an oxyg...	12/14/1982
4323390	Process for converting brass scrap to copper powder Copper powder is produced from brass by reacting the brass with hydrochloric acid in an oxygen-free atmosphere at a temperature of at least 70° C. until the non-copper metals and impurities of the brass are dissolved, oxidizing at least 10 percent by wei...	04/06/1982
4310349	Highly orientable iron particles Highly orientable acicular iron particles are made by reducing an acicular ferric oxide which has been coated with sodium tripolyphosphate....	01/12/1982
4231790	Process for the preparation of tantalum and niobium powders of improved efficiency An anhydrous mixture of extrudable viscosity of an activated alkali metal tantalum or niobium halide powder, an alkali metal halide powder, and a molten alkali metal in about 1:0.75-2.0:4.75-5.5 molar ratio is formed into a paste which is extruded and for...	11/04/1980
4213777	Making iron powder having fiber-like particles Iron oxide powder, e.g., ore, is reduced in a CO/N2 atmosphere at a temperature between 750° to 1200° C., whereby prior to the onset of precipitation of metallic iron the content of H2 is limited to 15% (vol) of the CO content, and...	07/22/1980
4178172	Process for the production of extra fine cobalt powder Extra fine cobalt powder is manufactured by pyrolysing a cobalt (III)hexammine salt and then reducing the obtained oxide....	12/11/1979
4154608	Production of high purity iron powder High purity iron powder may be obtained by treating an iron bearing source which contains impurities such as silica along with minor amounts of aluminum, calcium and magnesium to a series of steps which include grinding the iron bearing source followed by...	05/15/1979

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Class 75/359 - Reduction