Class 423/151 - Converting metal to magnetic form

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes including the step of changing a metal from a
No. of patents: 35
Last issue date: 07/29/2008

Number	Title	Issue Date
7404937	Production of synthetic rutile by continuous leaching A reactor 20 has a plurality of tubular downcomers 32, 34, 36, 38, 40 and risers 42, 44, 46, 48, 50, joined by sections 86, 88 in a continuous serpentine path the tubes dimensioned to provide substantially plug flow conditions for solid a...	07/29/2008
7163667	Production process for oxide magnetic material and oxide magnetic material A production process for an oxide magnetic material comprising the steps of blending raw material powder so as to take the composition of a hexagonal ferrite including: at least one kind of an element A selected from the group consisting of Ba, Sr and Ca; Co and Cu;...	01/16/2007
6923328	Method and apparatus for separating metal values Methods and apparatuses for separating metal values, such as nickel and nickel compounds, from mineral ores, including lateritic ores are disclosed. The method includes providing a mixture of particles (e.g., crushed and sized ore) that is composed of at least a fir...	08/02/2005
6627313	Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same Spindle-shaped magnetic metal particles containing iron as a main component of the present invention, have an average major axis diameter (L) of 0.05 to 0.15 μm; a coercive force of 111.4 to 143.2 kA/m; a Co content of from 0.5 to less than 5 atm % based...	09/30/2003
6544673	Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same Spindle-shaped magnetic metal particles containing iron as a main component, having an average major axis diameter (L) of 0.05 to 0.15 μm; a coercive force of 111.4 to 159.2 kA/m; a Co content of from 5 to less than 15 atm % based on whole Fe; a crystall...	04/08/2003
6319485	Magnetic material and production method thereof A magnetic material made up of an assembly of particles substantially consisting of an ଱"-Fe16 N2 crystal having a body-centered tetragonal system (bct). The magnetic material has a high saturated magnetic flux density and is d...	11/20/2001
5911967	Process and apparatus for production of ferric oxide from iron chloride solutions A process and an apparatus for the production of iron oxides having low chloride ion content comprising charging of a free HCl containing iron chloride solution into a spray roaster with a feeding device and a spray boom for charging the iron chloride con...	06/15/1999
5738717	Coloring pigment and method of manufacture Coloring pigment of comparable quality to, and cheaper than, pigments products by chemical precipitation, is made from synthetic magnetite produced by oxidation of ferrous mill scale and reduced to a particle size such that preferably at least 85% of the ...	04/14/1998
5660772	Process for making ultra-fine barium hexaferrite particles A process for producing ultra-fine barium hexaferrite particles. In the first step of this process, a ceramic precursor material containing barium and trivalent ferric cations, a nitrogen-containing material, a solvent, and an anion capable of participati...	08/26/1997
5487878	Method for preparing perpendicularly magnetizable material usable on magnetic recording media A method for preparing a perpendicularly magnetizable material usable on magnetic recording media comprises the steps of: dissolving at least one member of the group consisting of strontium chloride and strontium nitrate with at least one member of the gr...	01/30/1996
5378438	Benefication of titaniferous ores A process for beneficiation of titaniferous ores is disclosed in which a titanium and iron-containing ore, such as ilmenite is heated with potassium hydroxide, e.g. at temperatures of about 350°-650° C. and then treating the product with carbon monoxide...	01/03/1995
5316746	High purity iron oxide and method for production hereof A method for producing high-purity iron oxide which comprises pulverizing iron ore into powder having an average particle diameter of 20-150 μm, removing fine particles from the powder, and subjecting the powder to wet magnetic separation in a magnetic f...	05/31/1994
5186920	Recovering TiO₂ concentrates from TiO₂ -containing substances The iron content of the TiO2 -containing precursor is subjected to a direct reduction to effect a metallization of at least 90%. The reduced product is separated into magnetic and nonmagnetic fractions by magnetic separation. To oxidize the met...	02/16/1993
5076836	Process for the preparation of ferromagnetic metallic particles for magnetic recording A process for the preparation of ferromagnetic metallic particles for magnetic recording which comprises (I) a step of preparing a slurry of acicular iron oxide hydrate containing nickel and, if necessary, manganese, (II) a step of coating the surface of the a...	12/31/1991
4565675	Process for treating and recovering pickling waste liquids for stainless steel A process for treating and recovering pickling waste liquids used for the pickling of stainless steel such as nitric-hydrofluoric acid, nitric acid, hydrochloric acid and, sulfuric acid is disclosed, which comprises recovering the nitric-hydrofluoric acid...	01/21/1986
4497655	Process for production of high-purity metallic iron A process for production of metallic iron by heating ammonium iron fluoride or iron fluoride in hydrogen stream....	02/05/1985
4360379	Process for the removal of rust from cast iron borings and the like in preparation for melting Process and means for the removal of iron rust from cast iron borings or chips to prepare the same for melting. The process involves the heating and agitation of such borings or chips, converting the rust of the same to magnetite and chemically uncombined...	11/23/1982
4320022	Dry granular calcined magnetic fraction obtained from chrysotile asbestos tailings There is disclosed a dry granular calcined magnetic fraction obtained from chrysotile asbestos tailings comprising as its main constituents from 25 to 43% MgO, from 25 to 43% SiO2, from 15 to 40% iron expressed as Fe2 O3, ...	03/16/1982
4309390	Separation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnet Recovery of cobalt and manganese metal oxidation catalysts from residue of trimellitic acid manufacture and separation of recovered cobalt from recovered manganese can be accomplished by a novel method involving dissolving the residue in water, displacing...	01/05/1982
4308240	Recovery of cobalt and manganese from ash of residue from manufacture of trimellitic acid by acid extraction Cobalt and manganese are recovered from incineration ash obtained by combustion of residue from the manufacture of trimellitic acid and its recovery as 4-carboxyphthalic anhydride and then the recovered cobalt is separated from the recovered manganese by ...	12/29/1981
4298580	Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means Recovery of cobalt and manganese from residue of trimellitic acid manufacture and recovery as 4-carboxy-phthalic anhydride by extracting the residue with an aqueous alkaline solution containing carbonate ions which leaves a precipitate of metal carbonates...	11/03/1981
4298759	Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet A unique method of separating cobalt and manganese from residue obtained from the manufacture of trimellitic acid by the oxidation of pseudocumene in the presence of cobalt and manganese as metal oxidation catalysts and from each other without contributin...	11/03/1981
4289529	Process for beneficiating sulfide ores In a process for beneficiating one or more mineral values of sulfide ores by treating the sulfide ore with a metal containing compound under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusion of th...	09/15/1981
4276081	Process for beneficiating ores In a process for beneficiating one or more mineral values of sulfide ores and/or metal oxide ores selected from the group consisting of bauxite, taconite, apatite, titanium oxides and the metal oxides of Groups IIIB, IVB, VB, VIB, VIIB, VIIIB, IB, IIB and...	06/30/1981
4205979	Process for beneficiating oxide ores In a process for beneficiating one or more mineral values of a metal oxide ore selected from the group consisting of bauxite, taconite, chrysocolla, apatite, titanium oxides and the metal oxides of Groups IIIB, IVB, VB, VIB, VIIB, VIIIB, IB, IIB and IVA b...	06/03/1980
4201748	Process for thermal-activation of chalcopyrite-pyrite concentrates A process for thermal activation of chalcopyrite-pyrite ore concentrates for activation of iron values in both chalcopyrite and pyrite constituents whereby said iron values can be selectively removed in a subsequent acid leach. Controlled oxidizing condit...	05/06/1980
4185997	Process for treating basic converter slag Treated basic converter slag and a process for treating basic converter slag are disclosed, in which untreated slag in a molten state is subjected to an oxidation treatment and basicity adjustment treatment by the addition of a material containing SiO	01/29/1980
4176157	Calcining calcium sulphate dihydrate A method and apparatus for calcining calcium sulphate dihydrate in a calcination vessel in which the dihydrate is heated in the vessel to calcination temperature not only by heat applied to the exterior of the vessel but also by hot gas, especially hot ga...	11/27/1979
4115106	Method for producing metallic oxide compounds A method for producing metallic oxide compounds having a spinel type structure by reacting the beta form of hydrated iron oxide with a salt of an effective metallic cation....	09/19/1978
4067953	Process for upgrading ores containing baddeleyite Minerals, for example, zirconium minerals, are subjected to a chemical process of comminution, in particular with the aid of strong acids. These acids dissolve the carbonatic and silicious cements which hold together the crystalline forms of different min...	01/10/1978
4054639	Process for preparing magnetite starting from ferrous sulphate solutions A process is disclosed for preparing magnetite having an equiaxial morphology and a narrow particle size dispersion by precipitation from a ferrous sulphate solution, characterized in that: A. during a first step, at a temperature between 15° and 40° C,...	10/18/1977
4009263	Energized cobalt-containing animal feed An animal feed supplement containing cobalt in polarized form enhances the efficient utilization of protein by ruminant animals and promotes their growth. In a preferred form, the supplement consists essentially of the reaction product of cobalt carbonate...	02/22/1977
3994829	Process for production of activated carbon An improved process for the production in high yield of activated carbon particles of high activity comprises rapid removal of volatile material from the area of carbonaceous particles during the carbonization step by individually venting each hearth of a...	11/30/1976
3994819	Method for the preparation of acicular particles containing iron and other divalent metals The invention concerns the preparation of acicular particles of mixed oxalates of iron and of one or more metals of the group consisting of cobalt, nickel, copper, manganese, zinc, magnesium and cadmium. The method consists in preparing a first solution c...	11/30/1976
3970738	Process for producing iron oxide products from waste liquids containing ferrous salts The processes for producing iron oxide products from a solution of ferrous salts selected from the group consisting of waste liquid containing ferrous salts and aqueous solution in which ferrous salts obtained from the waste liquid are dissolved, under th...	07/20/1976

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Class 423/151 - Converting metal to magnetic form