| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 04/01/1998 | EP0711203B1 Process and installation for recovering catalyst components |
| 03/26/1998 | CA2212714A1 Process for recovering tantalum and/or niobium compounds from compositescontaining a variety of metal compounds |
| 03/24/1998 | US5730774 Process for upgrading titaniferous materials |
| 03/18/1998 | EP0828552A1 Process for recovery of metal ions |
| 03/17/1998 | US5728639 Recovery of spent catalyst |
| 03/17/1998 | US5728197 Reclamation process for tungsten carbide/cobalt using acid digestion |
| 03/05/1998 | WO1998008993A1 Process for reducing co and cos emissions from a fluidized bed reactor for chlorinating titanium containing material |
| 03/05/1998 | CA2263309A1 Process for reducing co and cos emissions from a fluidized bed reactor for chlorinating titanium containing material |
| 03/04/1998 | EP0826070A1 Process temperature control of a fluidized bed reactor |
| 03/04/1998 | EP0734355B1 Recovery of spent catalyst |
| 02/24/1998 | US5722034 Method of manufacturing high purity refractory metal or alloy |
| 02/24/1998 | CA2013624C Process for the removal of chlorine from off-gases |
| 02/11/1998 | EP0474704B1 Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 02/05/1998 | WO1998004750A1 Method for separating titanium and/or vanadium from pig iron |
| 02/05/1998 | WO1998004375A1 Titanium-base powder and process for the production of the same |
| 02/04/1998 | CN1172170A Method for smelting ferro-niobium by two-step electric furnace reduction |
| 01/27/1998 | US5711783 Preparation from metal alkoxides of high purity metal powder |
| 01/22/1998 | DE19628816A1 Ammonium para-tungstate production in good yield without neutralising excess soda and acidification |
| 01/21/1998 | EP0819771A1 Reclamation process for tungsten carbide/cobalt using oxidation and acid digestion |
| 01/07/1998 | EP0815271A1 Fast quench reactor and method |
| 01/01/1998 | CA2209262A1 Recovery of titanium values from titanium grinding swarf by electric furnace smelting |
| 12/30/1997 | US5702500 Integrated process for the recovery of metals and fused alumina from spent catalysts |
| 12/29/1997 | EP0814506A2 Sputtered titanium wiring pattern using a highly purified Ti-target |
| 12/23/1997 | US5700519 Method for producing ultra high purity titanium films |
| 12/11/1997 | WO1997046724A1 Process for obtaining chromium enriched chromite from chromite ores |
| 12/11/1997 | WO1997046723A1 Process for producing a metallurgical raw material from oil containing heavy metals |
| 12/10/1997 | CN1167085A Production of titanium oxide |
| 12/04/1997 | DE19622153A1 Verfahren zur Erzeugung eines metallurgischen Rohstoffs A process for producing a metallurgical raw material |
| 11/26/1997 | EP0808377A1 Treatment of titanium-containing material |
| 11/26/1997 | EP0777753A4 Method of making metals and other elements |
| 11/26/1997 | CN1036514C Method for conversion of carbon containing partial oxidized from gasification process |
| 11/20/1997 | DE19720420A1 Metal production from metal oxide particles |
| 11/20/1997 | DE19619228A1 Removing antimony from hydrofluoric acid solutions |
| 11/19/1997 | CN1165540A Chromium ore smelting redution process |
| 11/11/1997 | US5685244 Recovering vanadium-iron alloy from fly ash, molten slag layer |
| 11/05/1997 | EP0804962A1 Process for the production of mixed oxides powders from deactivated catalysts for the reduction of the NOx concentration in a gas stream |
| 10/30/1997 | WO1997040199A1 Method of making tantalum metal powder with controlled size distribution and products made therefrom |
| 10/28/1997 | US5682593 Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate |
| 10/28/1997 | CA2090482C Process for separating ilmenite |
| 10/22/1997 | EP0662929B1 Method for reclaiming metal sulfate-containing waste sulfuric acid |
| 10/21/1997 | US5679983 Semiconductors; packages; chips; titanium, zirconium, hafnium with low level of impurities |
| 10/21/1997 | US5679131 Method for producing titanium oxide from ore concentrates |
| 10/16/1997 | WO1997038143A1 Method for lowering the oxygen content in valve metal materials |
| 10/15/1997 | EP0801030A2 Production of titanium oxide |
| 10/15/1997 | EP0800883A2 Method for producing amorphous based metals |
| 10/14/1997 | US5676817 Three stage purification; ph reduction, anion exchange and membrane electrolysis |
| 10/12/1997 | CA2190422A1 Method for producing amorphous based metals |
| 10/08/1997 | EP0799899A1 Chromium ore smelting reduction process |
| 10/02/1997 | WO1997036014A1 METHOD FOR SOLUBILIZING METAL VALUES FROM Ta-Nb-ORE MATERIALS CONTAINING INSOLUBLE FLUORIDES |
| 10/02/1997 | WO1997036013A1 Recovery of metal values from solids by digestion in sulfuric acid medium including a reductant |
| 10/02/1997 | WO1997036011A1 Recovery of metal values |
| 10/01/1997 | CN1161064A Method of making metals and other elements |
| 09/23/1997 | US5670121 Analyzing exhaust gas stream to determine concentrationcarbonyl sulfide to sulfur dioxide |
| 09/03/1997 | EP0792247A1 Metal and fluorine values recovery from mineral ore treatment |
| 08/27/1997 | EP0763141A4 Tantalum production and product |
| 08/26/1997 | US5660805 Method for beneficiating titanium-bearing material containing iron |
| 08/13/1997 | CN1157010A Process for producing hydraulic binders and/or alloys, E.G. ferrochromium or ferrovanadium |
| 07/30/1997 | EP0786016A1 Roasting of titaniferous materials |
| 07/23/1997 | EP0641395B1 Synthetic rutile production |
| 07/23/1997 | EP0528974B1 Method of producing high surface area low metal impurity tantalum powder |
| 06/12/1997 | WO1997020767A1 Vapor phase fluidized bed sulfation of titaniferous materials |
| 06/11/1997 | EP0777753A1 Method of making metals and other elements |
| 06/10/1997 | US5637281 Controlled activated heating |
| 05/29/1997 | WO1997019199A1 Method to upgrade titania slag and resulting product |
| 05/21/1997 | EP0764138A4 Treatment of leach liquors for upgrading a titaniferous material |
| 05/21/1997 | EP0741802A4 Leaching of titaniferous materials |
| 05/07/1997 | EP0771881A1 An integrated process for the recovery of metals and fused alumina from spent catalysts |
| 05/07/1997 | EP0719346A4 Ilmenite processing using cold milling |
| 05/02/1997 | EP0770149A1 Process for producing hydraulic binders and/or alloys, e.g. ferrochromium or ferrovanadium |
| 04/23/1997 | EP0717783A4 Upgrading titaniferous materials |
| 04/23/1997 | CN1148413A Treatment of leach liquors for upgrading titaniferous material |
| 04/23/1997 | CN1148412A Leaching of titaniferous material |
| 04/23/1997 | CN1148093A Method for recovering copper and chromium from waste industrial catalyst |
| 04/15/1997 | US5620936 Tantalum and niobium salts |
| 04/09/1997 | EP0767243A1 Recovery of active components from carrier or monolythic catalysts |
| 04/08/1997 | US5618502 Zirconium and hafnium separation in sulfate solutions using continuous ion exchange chromatography |
| 04/08/1997 | US5618331 Vapor phase fluidized bed sulfation of titaniferous materials |
| 04/03/1997 | WO1997012071A1 Recovery of vanadium |
| 04/02/1997 | EP0765943A1 Removal of radionuclides from titanium bearing ores |
| 03/28/1997 | CA2184538A1 Removal of radionuclides from titanium bearing ores |
| 03/26/1997 | EP0764138A1 Treatment of leach liquors for upgrading a titaniferous material |
| 03/25/1997 | US5613998 Reclamation process for tungsten carbide and tungsten-based materials |
| 03/20/1997 | DE19545290C1 Prepn. of free-flowing solid mixt. of calcium fluoride and calcium sulphate |
| 03/19/1997 | EP0763141A1 Tantalum production and product |
| 03/04/1997 | WO1997012066A1 Chromium ore smelting reduction process |
| 02/25/1997 | US5605561 Tantalum powder and electrolytic capacitor using same |
| 02/19/1997 | CN1143394A Leaching of titaniferous materials |
| 02/13/1997 | WO1997005295A1 Process and device for recovering hard alloys and sintered materials |
| 02/11/1997 | US5601630 Process for the production of synthetic rutile |
| 02/06/1997 | WO1997004141A1 Zirconium and hafnium separation in chloride solutions using continuous ion exchange chromatography |
| 02/06/1997 | WO1997003743A1 Zirconium and hafnium separation in sulfate solutions using continuous ion exchange chromatography |
| 02/04/1997 | US5599514 Treating reaction liquors with alkaline earth metal hydroxide, treating precipitate formed with mineral acid to dissolve cobalt salt, separating tungstic acid |
| 01/29/1997 | EP0755459A1 Leaching of a titaniferous material |
| 01/28/1997 | US5597401 Refractory metal SWARF composition and method of making same |
| 01/22/1997 | EP0754091A1 Improved fluidized bed process |
| 01/21/1997 | US5595347 Specific gravity separation stage, low intensity magnetic separation stage, single stage magnetic roast with controlled oxygen potential, low to medium intensity magnetic separation stage |
| 12/24/1996 | CA2047650C Process for the recovery of titanium values |
| 12/19/1996 | CA2623200A1 Pyrometallurgical process for treating metal-containing materials |
| 12/17/1996 | US5585078 Process for reducing carbon monoxide and carbonyl sulfide emissions from a fluidized bed titanium dioxide chlorinator |
| 12/17/1996 | US5584906 Molten salt electrolysis; thermal reduction or decomposition; sieving; classification; melting by electron beam |