| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 08/24/2000 | WO2000049188A1 Refining of tantalum and tantalum scrap with carbon |
| 08/24/2000 | WO2000048944A1 Improved methods for leaching of ores |
| 08/24/2000 | WO2000048771A1 Method and device for moulding titanium parts |
| 08/24/2000 | DE19859683C1 Verfahren zur Extraktion von Anionen A process for extraction of anions |
| 08/23/2000 | EP1029094A1 Method for dissolution of nitrogen-rich inclusions in titanium and titanium alloys |
| 08/23/2000 | EP0652977B1 Treatment of titaniferous materials |
| 08/22/2000 | US6106765 Purification process for chromium |
| 08/16/2000 | CN1055505C Extraction procedure of vanadium smelting |
| 07/19/2000 | EP1019566A1 Electrochemical dissolution of nuclear fuel pins |
| 07/18/2000 | US6090354 Process for the production of titanium oxide |
| 07/06/2000 | WO2000039350A1 Method for extracting anions of ivb to viii metals using alkyl-substituted 1,3-diaminopropanes |
| 07/06/2000 | CA2355853A1 Method of extracting anions of metals of groups ivb to viii by means of alkyl-substituted 1,3-diaminoprpopanes |
| 07/05/2000 | EP1015648A1 Hard material titanium carbide based alloy, method for the production and use thereof |
| 07/05/2000 | CN1258754A Recovery process of waste cobalt-molybdenum catalyst |
| 06/14/2000 | EP1007750A1 Titanium alloy based dispersion-strengthened composites |
| 06/02/2000 | WO2000031310A1 High purity tantalum and products containing the same like sputter targets |
| 06/02/2000 | CA2352336A1 High purity tantalum and products containing the same like sputter targets |
| 05/31/2000 | CN1053016C Consumable electrode and alloy ingot casting and forging metal product using the electrode and its method |
| 05/24/2000 | CN1254022A Pretreatment method for extracting vanadium pentoxide from vanadium-contained ore |
| 05/24/2000 | CN1052759C Fast quench reactor and method |
| 05/18/2000 | WO2000007760A8 Purification process for chromium |
| 05/17/2000 | EP0922121B1 Process for reducing co and cos emissions from a fluidized bed reactor for chlorinating titanium containing material |
| 05/17/2000 | CN1253595A Process and device for recovering raw materials from waste and residues |
| 05/17/2000 | CN1253185A Process for separating titanium component from titanium-contained slags |
| 05/17/2000 | CN1052461C Method for manufacturing alkali chromates from chromium ore |
| 05/04/2000 | WO2000024943A1 Treating niobium and/or tantalum containing raw materials |
| 05/04/2000 | CA2356988A1 Treating niobium and/or tantalum containing raw materials |
| 05/03/2000 | EP0997542A1 Niobium powder and method for its production |
| 04/27/2000 | WO2000023628A2 Low cost high speed titanium and its alloy production |
| 04/26/2000 | CN1251325A Niobium powder and method for producing niobium and/or tantalum powder |
| 04/20/2000 | DE19847012A1 Niobpulver und Verfahren zu dessen Herstellung Niobium powder and process for its preparation |
| 04/19/2000 | EP0993419A1 A process for producing an aqueous solution comprising ferric chloride |
| 04/11/2000 | US6048505 Reacting ore or slag with sulfuric acid to slurry; filtration, washing, circulation, separating, and recovering; hydrolysis; roasting titanium oxide hydrate |
| 04/05/2000 | EP0912771B1 Process for producing a metallurgical raw material from oil containing heavy metals |
| 03/22/2000 | CN1248230A Treatment of solution containing iron salts |
| 03/21/2000 | US6039788 Melting and casting of high purity chromium with controlled oxygen content |
| 03/15/2000 | CN1247576A Tantalum powder, method for producing same powder and sintered anodes obtained from it |
| 03/15/2000 | CN1247575A Tantalum powder, method for producing same powder and sintered anodes obtained from it |
| 02/17/2000 | WO2000007760A1 Purification process for chromium |
| 02/16/2000 | EP0979314A1 Process and device for recovering raw materials from waste and residues |
| 02/10/2000 | WO2000006786A1 Beneficiation of titania slag by oxidation and reduction treatment |
| 02/08/2000 | US6022395 Doping an ammonium molybdate solution with a soluble potassium compound, forming an ammonium dimolybdate precipitate and reducing the precipitate to form a metal powder. |
| 02/01/2000 | US6019812 Subatmospheric plasma cold hearth melting process |
| 01/20/2000 | WO2000002813A1 Process for chlorine recovery |
| 01/20/2000 | DE19831280A1 Acidic earth metal, specifically tantalum or niobium, powder for use, e.g., in capacitor production is produced by two-stage reduction of the pentoxide using hydrogen as the first stage reducing agent for initial suboxide formation |
| 01/04/2000 | US6010676 Method for making a highly pure tantalum compound |
| 12/22/1999 | EP0964937A1 Tantalum powder, method for producing same powder and sintered anodes obtained from it |
| 12/22/1999 | EP0964936A1 Tantalum powder, method for producing same powder and sintered anodes obtained from it |
| 12/21/1999 | US6004368 Melting of reactive metallic materials |
| 12/16/1999 | WO1999064638A1 Removal of oxygen from metal oxides and solid solutions by electrolysis in a fused salt |
| 12/16/1999 | WO1999041417B1 Method for producing high-purity molybdenum chemicals from molybdenum sulfides |
| 12/14/1999 | US6001148 Process for obtaining metal from metal oxide |
| 12/07/1999 | US5997607 Process of condensing metal in condensation chamber |
| 12/07/1999 | US5997606 Production of titanium slag |
| 12/02/1999 | WO1999061672A1 Tantalum-silicon alloys and products containing the same and processes of making the same |
| 12/02/1999 | WO1999061670A1 Tantalum sputtering target and method of manufacture |
| 12/01/1999 | CN1236819A Technology for producing titanium slabs |
| 11/30/1999 | US5993513 Method for controlling the oxygen content in valve metal materials |
| 11/24/1999 | CN1236399A Process for obtaining titanium or other metals using shuttle alloys |
| 11/18/1999 | WO1999058732A1 Process to recover molybdenum and vanadium metals from spent catalyst by alkaline leaching |
| 11/16/1999 | US5986877 Tantalum metal power with controlled size distribution and products made therefrom |
| 10/27/1999 | EP0952239A1 Sputtering target based on highly purified titanium |
| 10/27/1999 | EP0951572A1 Process for obtaining titanium or other metals using shuttle alloys |
| 10/26/1999 | US5972282 Straight hearth furnace for titanium refining |
| 10/26/1999 | US5972065 Purification of tantalum by plasma arc melting |
| 10/21/1999 | WO1999041417A3 Method for producing high-purity molybdenum chemicals from molybdenum sulfides |
| 10/19/1999 | US5968224 Pelletization of sifted, fine particulate material with alkali or alkaline earth metal-free binder, then smelting in oxygen-free atmosphere to form useful ferrotitanium alloy or high titanium slag; pollution control |
| 10/05/1999 | CA2182123C Method for the production of synthetic rutile |
| 09/30/1999 | WO1999048808A1 METHOD FOR REPROCESSING WASTE ACID RESULTING FROM TiO2 PRODUCTION |
| 09/30/1999 | CA2324308A1 Method for reprocessing waste acid resulting from tio2 production |
| 09/28/1999 | US5958106 Method of making metals and other elements from the halide vapor of the metal |
| 09/23/1999 | DE19812261A1 Production of gypsum and iron oxide pigments from dilute acid formed in the manufacture of titanium dioxide |
| 09/21/1999 | US5954856 The improvement comprising subjecting reduced, washed, acid leached and dried basic lot powder to a deagglomeration step before heat treating |
| 09/10/1999 | WO1999045160A1 Method for electrochemical oxidation of vanadium in aqueous solutions and method to obtain vanadium pentoxide |
| 08/26/1999 | DE19806863A1 Metal melting process especially for melting titanium and its alloys in the production of dental castings |
| 08/19/1999 | WO1999041417A2 Method for producing high-purity molybdenum chemicals from molybdenum sulfides |
| 08/19/1999 | WO1999041317A1 PROCESS AND FURNACE FOR THE PRODUCTION OF TiO2 PIGMENT ACCORDING TO THE SULFATE PROCESS |
| 08/19/1999 | DE19806474A1 Verfahren und Ofen zur Herstellung von TiO¶2¶-Pigment nach dem Sulfatverfahren Method and furnace for producing TiO¶2¶ pigment by the sulphate process |
| 08/19/1999 | CA2321422A1 Process and furnace for the production of tio2 pigment according to the sulfate process |
| 08/11/1999 | EP0935006A1 Melting of reactive metallic materials |
| 08/11/1999 | EP0934432A1 METHOD OF DE-CHROMING AND/OR DEPLETING THE MgO CONTENT OF STEEL SLAG |
| 08/10/1999 | US5935545 Process for producing an aqueous solution comprising ferric chloride |
| 08/10/1999 | US5935293 Fast quench reactor method |
| 08/03/1999 | US5932184 Digesting with aqueous naoh; mole ratio of waer sufficient to dissolve the produced sodium tungstate |
| 07/21/1999 | CN1223695A Method of making tantalum metal powder with controlled size distribution and products made therefrom |
| 07/21/1999 | CN1044221C Method for reclaiming metal sulfate-containing waste sulfuric acid |
| 07/19/1999 | CA2224116A1 Zirconium and hafnium separation in chloride solutions using continuous ion exchange chromatography |
| 07/19/1999 | CA2224090A1 Zirconium and hafnium separation in sulfate solutions using continuous ion exchange chromatography |
| 07/07/1999 | EP0826070B1 Process temperature control of a fluidized bed reactor |
| 06/30/1999 | CN1221458A Method for lowering oxygen content in valve metal materials |
| 06/23/1999 | CN1220705A Process for producing metallurgical raw material from oil containing heavy metals |
| 06/16/1999 | EP0922121A1 Process for reducing co and cos emissions from a fluidized bed reactor for chlorinating titanium containing material |
| 06/16/1999 | CN1219980A Recovery method of metal values from solids by digestion in sulfuric acid medium including reductant |
| 06/16/1999 | CN1219979A Method for solubilizing metal values from Ta-Nb-ore materials containing insoluble fluorides |
| 06/16/1999 | CN1219978A Recovery method of metal values |
| 06/10/1999 | DE19743695A1 Apparatus and method for melting and remelting of materials into blocks |
| 06/08/1999 | US5910621 Treatment of titaniferous materials |
| 06/08/1999 | CA2054205C Process for recovering valuable metals from spent catalysts |
| 06/01/1999 | US5908489 Process for removing antimony from hydrofluoric acid solutions which contain Ta/Nb |
| 05/12/1999 | EP0915178A2 Sputtering target of highly purified titanium |