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| Number | Title | Issue Date |
| 8128727 | Method for collecting metal It is an object of the present invention to collect a scarce metal such as iridium from a light-emitting element which is no longer used. A method for collecting a metal is provided in which an organic metal compound which can emit visible light from a triplet excit... | 03/06/2012 |
| 7935171 | Production of metallic nickel with low iron content A process for producing a metallic nickel product with a low iron content, that includes: (i) providing an acidic product liquor; (ii) subjecting the acidic product liquor to an ion exchange process to absorb the nickel and part of the iron; (iii) eluting the nickel... | 05/03/2011 |
| 7740685 | Process for removal of the catalytic coating material from spent, defective or unused metal support catalytic converters Process for recovering catalyst coating material from a supporting structure, such as, for example, a catalytic converter assembly having a metal mantle, including contacting the catalytic coating material with a sodium, potassium or ammonium hydroxide-containing co... | 06/22/2010 |
| 7597738 | Production of ferro-nickel or nickel matte by a combined hydrometallurgical and pyrometallurgical process A process for the production of ferro-nickel or nickel matte from a product liquor solution containing at least nickel, cobalt, iron and acid soluble impurities, said process including the steps of: (a) contacting the product liquor solution (7) containing th... | 10/06/2009 |
| 7371337 | Zinc oxide powder aggregates present in circular, ellipsoidal, linear and branched form Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m2/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, ... | 05/13/2008 |
| 7354472 | Metalothermic reduction of refractory metal oxides A method of producing a refractory metal powder by (A) combining (i) an oxide particle component and (ii) a reducing agent; (B) forming a substantially uniform mixture of (i) and (ii); (C) continuously feeding the mixture into a furnace; (D) igniting the mixture at ... | 04/08/2008 |
| 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 |
| 7329381 | Method for fabricating a metallic article without any melting A metallic article made of metallic constituent elements is fabricated from a mixture of nonmetallic precursor compounds of the metallic constituent elements. The mixture of nonmetallic precursor compounds is chemically reduced to produce an initial metallic materia... | 02/12/2008 |
| 6942715 | Process for producing metallic titanium A process for producing metallic titanium includes forming metallic titanium fine particles by supplying liquid or mist titanium tetrachloride from above the surface of a reaction bath liquid containing fused magnesium and fused magnesium chloride in a reaction vess... | 09/13/2005 |
| 6797195 | Method for recovering and separating metals from waste streams A method for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removed from waste streams and with minimal amounts of unprocessed solids and... | 09/28/2004 |
| 6379416 | Method and device for melt-treating incineration residue containing salts A component adjustor is added to an incineration residue containing salts to adjust a component ratio determined by the equation (Ca+Mg)/(Si+Al) in the range of 0.7 to 2.0. The incineration residue having the adjusted component ratio is charged to a melti... | 04/30/2002 |
| 6274045 | Method for recovering and separating metals from waste streams A method is disclosed for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removal from waste streams and with minimal amounts o... | 08/14/2001 |
| 6270679 | Method for recovering and separating metals from waste streams A method is disclosed for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removal from waste streams and with minimal amounts o... | 08/07/2001 |
| 6254782 | Method for recovering and separating metals from waste streams A method is disclosed for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removal form waste streams and with minimal amounts o... | 07/03/2001 |
| 6238633 | Process for preparing calcium aluminate from aluminum dross A non-metallic product (NMP) substantially free of metallic aluminum and aluminum nitride which is utilized for making calcium aluminate.... | 05/29/2001 |
| 6080224 | Method for processing waste containing metal contaminants using a reducing agent The invention relates to a method for processing waste that contains contaminants. The contaminants may be metals modified by carbon, oxygen, phosphorus, or sulfur. The waste in the form of a powder is mixed with an ionic reducing agent in an inert liquid... | 06/27/2000 |
| 5993512 | Method and system for recycling byproduct streams from metal processing operations A method and system for recycling byproduct streams from metal processing operations introduces a flow of a molten mixture of salts, metal and metal oxides from a melting vessel into a flow of water. The molten salts dissolve into the water. The metal oxi... | 11/30/1999 |
| 5993511 | Process of preparing nickel cermet A nickel cermet containing a metal nickel phase and an yttria stabilized zirconia phase, is prepared by a process comprising: preparing a suspension of the zirconia in demineralized water; preparing a solution of a nickel salt in demineralized water; mixi... | 11/30/1999 |
| 5908559 | Method for recovering and separating metals from waste streams A method for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removal from waste streams and with minimal amounts of unprocessed... | 06/01/1999 |
| 5849063 | Production of direct reduced iron and/or pig iron from industrial waste streams A method for producing direct reduced iron or/and pig iron from an industrial waste materials stream such as EAF and blast furnace dust generally comprising the steps of separating the materials contained in the waste materials stream by magnetic separati... | 12/15/1998 |
| 5759231 | Method for processing metal chips and/or metal dust A method for processing metal chips and/or metal dust, including a first process step in which the metal is moistened and fed by a conveyor system to a collecting tank, especially a settling tank. In further process steps the material being processed pass... | 06/02/1998 |
| 5755853 | Process for the treatment of solid residues containing metals, in particular residues from the cleaning of household garbage incineration smoke This process comprises; mixing (1) the solid residues with a solid reducing agent; treating (2) the mixture in a furnace at a temperature above 1000° C. to obtain (3) a vitrified product rendered poor in metals and an emission of gas enriched in metallic... | 05/26/1998 |
| 5753125 | Method for recovering and separating metals from waste streams A method for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removal from waste streams and with minimal amounts of umprocessed... | 05/19/1998 |
| 5749939 | Melting of NI laterite in making NI alloyed iron or steel A multiple stage process for obtaining Ni units from Ni laterite ores and sulfur-bearing Ni concentrates during production of nickel-alloyed iron, nickel-alloyed steel or nickel-alloyed stainless steel in a reactor equipped with top- and bottom-blowing me... | 05/12/1998 |
| 5725632 | Method for processing and utilizing metalliferous presipitates from the gas cleaning phase in thermal waste treatment A method for processing hetrogeneous metal-containing deposits recovered from the cleaning of synthesis gas produced during the thermal treatment of wastes containing metals, including volatile metals, in equipment having a heating enclosure and a waste l... | 03/10/1998 |
| 5419882 | Method for the removal of thallium A method for removing thallium ions from aqueous solutions uses manganese dioxide sludge produced during the electrolysis of zinc. The preferred allotropy of MnO2 is the -form, which selectively absorbs thallium ions with minimum interfe... | 05/30/1995 |
| 5364441 | Cotreatment of sewage and steelworks wastes Steelworks dusts or sludge is mixed into sewage preferably in the presence of a flocculating agent to provide a rapid separation of a clear effluent and a sludge which is dewatered and dried to form a solid material adapted to entrap harmful materials in ... | 11/15/1994 |
| 5158602 | Method and apparatus for separating copper from chromite The present invention is a method for separating copper (II) from chromite in a material containing both copper (II) and chromite. The present invention separation method essentially comprises the steps of: (a) extracting the material with a combined hot ... | 10/27/1992 |
| 5129945 | Scrap treatment method for rare earth transition metal alloys A method of treating rare earth-transition metal alloy scrap involves in one embodiment dissolving the scrap in aqueous sulfuric acid solution, reacting the solution with a hydroxide of an alkali element (e.g., Na or K) or ammonium to precipitate a double... | 07/14/1992 |
| 5123957 | Method for manufacturing low carbon ferrochrome with high chromium content A method for manufacturing a low carbon ferrochrome with a high chromium content of at least 70 weight % Cr comprising the steps of at least once nitriding and crushing a low carbon ferrochrome to form a crushed ferrochrome nitride and subjecting the crus... | 06/23/1992 |
| 5102453 | Aluminum dross recovery process A method for recovering reusable materials from aluminum dross is disclosed comprising crushing the dross and extracting solubles therefrom with water in a digester. The brine so obtained is processed in a crystallizer to obtain fluxing materials containe... | 04/07/1992 |
| 5084128 | Low-temperature synthesis of group III-group V semiconductors This invention relates to a low-temperature process for the preparation of group III-group V semiconducting material. More particularly, in the present process at least one group III compound is reacted with at least one group V compound in an aprotic sol... | 01/28/1992 |
| 5032176 | Method for manufacturing titanium powder or titanium composite powder A method for manufacturing a titanium powder, which comprises the steps of: causing a molten reducing agent comprising molten magnesium at a temperature of 650° to 900° C. or molten sodium at a temperature of 100° to 900° C. to fall into a reaction ... | 07/16/1991 |
| 5032175 | Process for removing impurities from flue dusts The invention is a process for the removal of high concentrations of impurities including antimony (Sb), bismuth (Bi), arsenic (As), lead (Pb), zinc (Zn), cadmium (Cd), selenium (Se) and tellurium (Te) contained in flue dusts produced during the smelting ... | 07/16/1991 |
| 4834849 | Metal recovery method and apparatus An apparatus for recovering a conductive metal from a liquid which contains that metal, and a method for recovering that metal using that apparatus. The apparatus includes a generally closed non-metallic container defining a cavity, for containing the liq... | 05/30/1989 |
| 4826666 | Method of preparing metal carbides and the like and precursors used in such method Preparation of metal carbides, nitrides, borides, silicides and phosphides, also metal alloys and pure metals, by providing a precursor in which there are organic ligands bonded to the metal or metals, such precursor having the element X also bonded direc... | 05/02/1989 |
| 4812167 | Process for recovering metallic gallium from gallium compound-containing waste A sludge-like waste containing fine particulate gallium compound, an organic substance capable of forming coke upon calcination and a light oil or water are treated for the recovery of the gallium value as molten metallic gallium by a process wherein the ... | 03/14/1989 |
| 4732827 | Process for producing electrolyte for redox cell A process for producing an anolyte and a catholyte for redox cells which comprises the steps of heating chromium ore together with carbonaceous substances to produce a pre-reduced chromium product produced a part of iron and chromium in chromium ore, diss... | 03/22/1988 |
| 4561887 | Process for recovering metals from solution through solvent extraction and pyrometallurgical reduction Solvent extraction is used for selective recovery of a dissolved metal such as copper from an aqueous solution of metals by means of an organic liquid, immiscible with the aqueous solution and selective for the metal of interest. The metal is extracted fr... | 12/31/1985 |
| 4468248 | Process for making titanium metal from titanium ore In a process for the reduction of titanium salt comprising a halide of titanium to titanium metal by contacting said titanium salt in the molten state with a molten alloy and zinc to form a solution of titanium metal in zinc the improvement which comprise... | 08/28/1984 |
