| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 04/19/1994 | CA1328561C Method for producing metallic titanium and apparatus therefor |
| 04/14/1994 | WO1994008059A1 Refractory metal sway composition and method of making same |
| 04/14/1994 | CA2144772A1 Refractory metal swarf composition and method of making same |
| 04/13/1994 | EP0591411A1 Recovery of niobium metal |
| 04/06/1994 | CN1084898A Treatment of titaniferous materials |
| 03/30/1994 | CN1084575A Process for preparation of pure ammonium turgstate by ion-exchange one-stage separation of phosphorus, arsenic, silicon and molybdenum |
| 03/23/1994 | CN1084223A Upgrading titaniferous materials |
| 03/17/1994 | WO1994005600A1 The production of fluorotitanates |
| 03/16/1994 | CN1083795A The production of fluorotitanates |
| 03/10/1994 | DE4229435A1 Solvent and molybdenum@ recovery in dissolution of core in mfr. of incandescent lamp tungsten@ wire coil - by cyclic process using constant temp. in reactor and adjustment outside reactor for optimum results |
| 03/09/1994 | EP0585347A1 METHOD FOR PURIFYING TiO 2? ORE. |
| 03/09/1994 | EP0449892B1 Extraction and purification of titanium products from titanium bearing minerals |
| 03/03/1994 | WO1994004709A1 Upgrading titaniferous materials |
| 03/01/1994 | US5290527 From epoxidation catalysts, precipitation with ammonia, cooling to brittle solid |
| 03/01/1994 | US5290015 Method of producing high-melting-point and high-toughness metal and apparatus for the same |
| 03/01/1994 | CA1327272C Method for producing a metal from its halide |
| 02/22/1994 | CA1327125C Method for producing titanium dioxide |
| 02/17/1994 | WO1994003647A1 Treatment of titaniferous materials |
| 02/16/1994 | EP0583126A1 The production of high titania slag from ilmenite |
| 02/09/1994 | EP0582006A1 Method for producing high-purity metallic chromium |
| 02/09/1994 | EP0365680B1 A method for producing a reduced chromium-ore bearing powder |
| 02/03/1994 | WO1993024669A3 Continuous ore reaction process |
| 01/25/1994 | CA1326371C Oxidation process |
| 01/20/1994 | WO1994001190A1 Recovery of metal values from process residues |
| 01/20/1994 | CA2139642A1 Recovery of metal values from process residues |
| 01/19/1994 | CN1023548C Method for producing ta powder used in capacitor |
| 01/18/1994 | US5279804 Vanadium removal in aqueous streams |
| 12/28/1993 | US5273725 Concentrating radionuclide products by digesting with an aqueous solution of boric acid and a mineral acid; using a cation reactant to precipitate fluoride compounds |
| 12/21/1993 | US5271912 Enzymatic processing of materials containing chromium and protein |
| 12/21/1993 | US5271910 Process of treating metal chloride wastes |
| 12/09/1993 | WO1993024669A2 Continuous ore reaction process |
| 12/09/1993 | WO1993024668A1 Synthetic rutile production |
| 12/09/1993 | CA2136426A1 Synthetic rutile production |
| 12/09/1993 | CA2136179A1 Continuous ore reaction process |
| 12/08/1993 | EP0573083A1 Process for the treatment of vanadium containing wastes |
| 12/08/1993 | CN1079259A Process for extracting vanadium by adding calcium hydroxide |
| 12/01/1993 | EP0474704A4 Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 11/25/1993 | WO1993023580A1 Improved method for beneficiating titanium-bearing material containing iron |
| 11/25/1993 | CA2136299A1 Improved method for beneficiating titanium-bearing material containing iron |
| 11/18/1993 | EP0516763A4 Deoxidation of a refractory metal |
| 11/11/1993 | WO1993022465A1 PROCESS FOR PURIFYING ANATASE TiO2 ORE |
| 11/09/1993 | US5259866 Removal of sulfur, oxygen, nitrogen, iron & other impurities by sulfiding with metals, reducing with carbon or hydrogen, washing with acids; heat treatment |
| 11/09/1993 | US5259862 Continuous production of granular or powder Ti, Zr and Hf or their alloy products |
| 11/09/1993 | CA1323977C Nitrogen-free process for chloride-route tio_pigment manufacture |
| 11/03/1993 | EP0567671A1 Removal of chromium from chrome-tanned leather wastes |
| 10/27/1993 | CN1022579C Process for preparing reduced titanite ore powder |
| 10/19/1993 | CA1323199C Process and means for the fabrication on zirconium metal by zirconium titrachloride |
| 10/12/1993 | CA1322854C Metal sulphate suspension recovered from waste acid, a process for its preparation and its use |
| 09/29/1993 | CN1076731A A process for isolating tantalum and niobium |
| 09/16/1993 | WO1993018193A1 Acid washing of leached solids from the beneficiation of titaniferous ores |
| 09/16/1993 | WO1993018192A1 Continuous leaching of treated titaniferous ores with alcohol solutions |
| 09/16/1993 | WO1993018191A1 Continuous leaching of treated titaniferous ores with inter-stage evaporation |
| 09/16/1993 | WO1993017970A1 Enzymatic processing of materials containing chromium and protein |
| 09/14/1993 | US5244488 Direct smelting process with a thermal plasma |
| 09/07/1993 | US5242483 Forming vanadium containing aggregate, mixing with iron to form aggregate, reduction |
| 09/07/1993 | US5242481 Deoxygenation, heating with calcium or magnesium |
| 09/07/1993 | CA1322034C Bidirectional control signalling bus interface apparatus for transmitting signals between two bus systems |
| 09/01/1993 | CN1075754A Molybdenum smelting and its comprehensive applications |
| 08/11/1993 | EP0555128A1 Recovery of molybdenum and vanadium from used catalysts |
| 08/10/1993 | US5234491 Method of producing high surface area, low metal impurity |
| 08/10/1993 | US5234486 Electroslay method in inert gas |
| 08/04/1993 | CN1074948A Process and plant for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals |
| 08/03/1993 | US5232485 Method for obtaining high purity titanium |
| 07/22/1993 | WO1993014232A1 Process and plant for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals |
| 07/20/1993 | US5229087 Process for the preparation of titanium dioxide |
| 07/14/1993 | EP0517786A4 Production of synthetic rutile |
| 07/13/1993 | US5227032 Method for producing oxygen from lunar materials |
| 07/08/1993 | WO1993012902A1 Device and method for skull-melting depth measurement |
| 07/08/1993 | CA2112984A1 Device and method for skull-melting depth measurement |
| 07/06/1993 | US5225178 Extraction and purification of titanium products from titanium bearing minerals |
| 07/06/1993 | US5224986 Procss for the recovery of titanium values |
| 06/23/1993 | EP0378672B1 Cold hearth refining apparatus and method |
| 06/23/1993 | CN1073414A Process for separating V and Cr from waste liquid containing V or Cr, or both |
| 06/09/1993 | EP0544828A1 Method for maintaining fluidization in a fluidized bed reactor |
| 06/01/1993 | US5215727 Method of making chromic oxide |
| 05/19/1993 | EP0542322A1 Method for treating a vanadium containing residue |
| 05/19/1993 | DE4137320A1 Oxidative thermal treatment of vanadium contg. residues |
| 05/19/1993 | CN1072213A Process of treation vanadium-containing residue |
| 05/19/1993 | CN1072154A Process for recovering sulfuric acid from metallic sulfate-containing exhaust sulfuric acid. |
| 05/12/1993 | EP0541002A1 Process for recovering sulfuric acid from metal sulfate-containing waste sulfuric acid |
| 05/11/1993 | US5209910 Digestion with hydrofluoric acid, solvent extraction with methyl isobutyl ketone |
| 05/09/1993 | CA2082256A1 Process for recovering sulfuric acid from metallic sulfate-containing exhaust sulfuric acid |
| 04/29/1993 | DE4207145C1 Hydro:methallurgical process for recovery of tantalum and niobium - by digesting material e.g. columbite ore with hydrofluoric acid followed by solvent extn. of formed fluoro:complexes |
| 04/28/1993 | EP0386205B1 Improved process for obtaining impurity-free compounds of ta and/or nb from materials containing these metals |
| 04/27/1993 | US5205980 Sublimer assembly |
| 04/20/1993 | US5204057 Highly purified titanium material and its named article, a sputtering target |
| 04/13/1993 | US5201940 Pre-heating and pre-reduction of a metal oxide |
| 03/23/1993 | US5196916 Integrated circuit wiring, titanium, hafnium, zirconium |
| 03/16/1993 | US5194237 Reaction of molten titanium alloy or titanium/auxiliary metal blend with carbon, dispersion of titanium carbide crystals in metallic matrix |
| 03/16/1993 | US5194124 Molten salt electrolytic beneficiation of iron oxide-containing titaniferous ores to produce iron and high-grade TiO2 |
| 03/04/1993 | WO1993004207A1 Zirconium extraction |
| 03/04/1993 | WO1993004206A1 Titanium extraction |
| 03/04/1993 | CA2115423A1 Titanium extraction |
| 03/04/1993 | CA2115421A1 Zirconium extraction |
| 03/03/1993 | EP0528974A1 Method of producing high surface area low metal impurity tantalum powder. |
| 02/24/1993 | EP0527811A1 A process and plant for the preparation of alkaline chromates from chromium minerals. |
| 02/23/1993 | US5188809 Method for separating coke from a feed mixture containing zirconium and radioactive materials by flotation process |
| 02/17/1993 | CN1069072A Process for recovery of titanium values from complex matrix comprising titanium nitride |
| 02/16/1993 | US5186920 Recovering TiO2 concentrates from TiO2 -containing substances |
| 02/16/1993 | CA1313584C Process for the production of high-grade titanium dioxide by sulfate method |