| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 08/16/1995 | CA2142254A1 Preparation from metal alkoxides of high purity metal powder |
| 08/15/1995 | CA1336646C Reduced chromium-ore bearing powder and method for producing the same |
| 08/09/1995 | EP0666108A1 Process for recovering and re-using cobalt and tungsten from reaction liquors |
| 08/08/1995 | CA2141892A1 Process for recovering and re-using cobalt and tungsten from reaction liquors |
| 08/01/1995 | US5437849 Method of processing vanadium-containing residues |
| 08/01/1995 | US5437848 Recovery of metal values from process residues |
| 07/19/1995 | EP0662929A1 Method for reclaiming metal sulfate-containing waste sulfuric acid. |
| 07/12/1995 | EP0662158A1 Zirconium extraction |
| 07/11/1995 | US5431892 Process for recovering valuable metal from waste catalyst |
| 06/28/1995 | EP0659688A1 Process for the preparation of titanium dioxide by the sulphate process |
| 06/28/1995 | EP0659687A1 Process for the preparation of titanium dioxide |
| 06/27/1995 | US5427749 Treating ore with carbonaceous reducing agent yields rutile, titanium-bearing impurities and metallic iron which is then dissolved with sulfuric acid for removal |
| 06/27/1995 | US5427603 Heating residue which contains vanadium and carbon in presence of substoichiomteric amount of oxygen in furnace, withdrawing solid mixture containing vanadium dioxide |
| 06/27/1995 | CA1336042C Method of charging chromium ores in a smelting reduction |
| 06/22/1995 | WO1995016636A1 Recovery of spent catalyst |
| 06/22/1995 | WO1995016635A1 Recovery of spent catalyst |
| 06/21/1995 | EP0658214A1 Upgrading titaniferous materials |
| 06/21/1995 | EP0652977A4 Treatment of titaniferous materials. |
| 06/20/1995 | US5425927 Hafnium dioxide purification |
| 05/26/1995 | WO1995013985A1 Metal and fluorine values recovery from mineral ore treatment |
| 05/26/1995 | CA2175912A1 Metal and fluorine values recovery from mineral ore treatment |
| 05/24/1995 | EP0654540A1 Preparation of a TiIII-containing solution and its use |
| 05/24/1995 | EP0654539A1 Process for the preparation of titanium dioxide by the sulphate process |
| 05/24/1995 | CN1028544C Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 05/18/1995 | DE4404374C1 Recovery and sepn of tantalum and niobium from materials contg. both |
| 05/17/1995 | EP0652977A1 Treatment of titaniferous materials |
| 05/16/1995 | US5415848 Reducing chromium with ferrous sulfate and precipitation with barium nitrate |
| 05/02/1995 | US5411719 Production of acid soluble titania |
| 05/02/1995 | US5411611 Consumable electrode method for forming micro-alloyed products |
| 05/02/1995 | US5411574 Titanium extraction |
| 04/25/1995 | US5409679 Eliminating sulfur dioxide by-product from roasting the titanium dioxide hydrate by washing the dry gas with filtrate to form sulphuric acid, circulating, reuse |
| 04/05/1995 | CN1101080A Method for production of high titanium iron by use of aluminothermy |
| 04/04/1995 | US5403379 Reduction of titaniferous ores and apparatus |
| 03/30/1995 | WO1995008652A1 Roasting of titaniferous materials |
| 03/30/1995 | CA2172277A1 Roasting of titaniferous materials |
| 03/23/1995 | WO1995008004A1 Ilmenite processing using cold milling |
| 03/23/1995 | CA2169947A1 Ilmenite processing using cold milling |
| 03/16/1995 | WO1995007366A1 Upgrading titaniferous materials |
| 03/16/1995 | CA2171185A1 Upgrading titaniferous materials |
| 03/15/1995 | EP0642595A1 Continuous ore reaction process. |
| 03/14/1995 | US5397375 Process for the production of metallic titanium and intermediates useful in the processing of ilmenite and related minerals |
| 03/08/1995 | EP0641396A1 Improved method for beneficiating titanium-bearing material containing iron. |
| 03/08/1995 | EP0641395A1 Synthetic rutile production. |
| 03/07/1995 | US5395601 Re-calcination and extraction process for the detoxification and comprehensive utilization of chromic residues |
| 02/23/1995 | DE4425045A1 Method for the recovery of the tungsten content and other metal contents from articles containing tungsten |
| 02/21/1995 | US5391215 Method for producing high-purity metallic chromium |
| 02/16/1995 | WO1995004836A1 A consumable electrode method for forming micro-alloyed products |
| 02/15/1995 | EP0638515A2 Process for upgrading of diluted acid |
| 02/15/1995 | EP0520993B1 Process for removing inorganic gels and incompressible solids from acidic media |
| 02/14/1995 | US5389355 Method of preparing a synthetic rutile from a titaniferous slag containing alkaline earth metals |
| 02/14/1995 | US5389353 Using calcinated petroleum coke |
| 02/13/1995 | CA2130212A1 Process for working up thin acid |
| 02/09/1995 | WO1995003994A1 Method for reclaiming metal sulfate-containing waste sulfuric acid |
| 02/09/1995 | WO1995003887A1 Process and installation for recovering catalyst components |
| 02/09/1995 | CA2145986A1 Method for reclaiming metal sulfate-containing waste sulfuric acid |
| 01/31/1995 | US5385713 Contacting liquor with base to adjust pH, contacting at elevated temperature with aluminum hydroxide or aluminum sulfate |
| 01/24/1995 | US5384105 Radioactive, acid digestion |
| 01/12/1995 | WO1995001461A1 Method for extracting metals from catalysts on the basis of al2o¿3? |
| 01/05/1995 | DE4417556A1 Process for alkaline-oxidizing digestion of chromium ore |
| 01/03/1995 | US5378438 Heating with potassium hydroxide and then with carbon monoxide and water, magnetic separation |
| 12/21/1994 | EP0629581A1 Process for the production of TIO2 from TIO2 process residues |
| 12/20/1994 | US5374408 Process for the preparation of alkaline chromates from chromium minerals |
| 12/13/1994 | US5372681 Preparation of molten salt electrolytes containing divalent titanium |
| 11/24/1994 | WO1994026944A1 Process for upgrading titaniferous materials |
| 11/24/1994 | CA2162266A1 Process for upgrading titaniferous materials |
| 11/02/1994 | EP0621905A1 Process for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals |
| 10/26/1994 | EP0601027A4 Titanium extraction. |
| 10/26/1994 | CN1094094A Manufacturing method for high-purity chrome plate/target for film plating on glass |
| 10/19/1994 | EP0619766A1 Device and method for skull-melting depth measurement |
| 09/28/1994 | CN1026016C Process for extracting scandium from ore |
| 09/21/1994 | EP0616039A1 Separation and recovery of metal values from natural bitumen ash |
| 09/21/1994 | CN1092377A Carbon burn-off process |
| 09/07/1994 | EP0614236A2 Method for producing hydrogen storage alloy |
| 09/05/1994 | EP0662158A4 Zirconium extraction. |
| 08/31/1994 | EP0612854A1 Process for the production of synthetic rutile |
| 08/31/1994 | EP0475953B1 Production of acid soluble titania |
| 08/09/1994 | US5336790 Reacting molybdenum catalyst containing epoxidation reaction product residue with ammonia to precipitate molybdenum, separating solid, evaporating filtrate with water injection to prevent salt deposition, rapidly cooling concentrate |
| 07/20/1994 | EP0606957A1 Carbon burn-off process |
| 07/20/1994 | EP0606669A1 Carbon burn-off process |
| 07/19/1994 | US5330557 Fluid bed reduction to produce flowable molybdenum metal |
| 07/06/1994 | EP0436718B1 Method of charging ore in melt-reduction |
| 07/05/1994 | US5325603 Solids feed system and method for feeding fluidized beds |
| 06/29/1994 | CN1088623A Electric melting method for making stable zirconium oxide |
| 06/22/1994 | EP0328677B1 PROCESS FOR MELT REDUCTION OF Cr STARTING MATERIAL AND MELT REDUCTION FURNACE |
| 06/21/1994 | US5322548 Recovery of niobium metal |
| 06/15/1994 | EP0601027A1 Titanium extraction |
| 06/14/1994 | US5320815 Fluidized bed process |
| 06/09/1994 | WO1994012675A1 Beneficiation of titaniferous ores |
| 06/09/1994 | CA2149675A1 Beneficiation of titaniferous ores |
| 06/08/1994 | EP0591411A4 Recovery of niobium metal |
| 06/07/1994 | CA1329990C Method for induction melting reactive metals and alloys |
| 05/18/1994 | EP0594622A4 Solids feed system and method for feeding fluidized beds |
| 05/18/1994 | EP0426731B1 Sintered high titanium agglomerates |
| 05/11/1994 | EP0596718A1 Molybdenum recovery |
| 05/06/1994 | CA2094898A1 Molybdenum recovery |
| 05/04/1994 | EP0594622A1 Solids feed system and method for feeding fluidized beds. |
| 05/03/1994 | USRE34598 Integrated circuit |
| 05/03/1994 | US5308378 Surface passification of a group IVB metal sponge regulus |
| 05/03/1994 | CA1329006C Method of preparing a synthetic rutile from a titaniferous slag containing alkaline earth metals |
| 04/28/1994 | CA2109023A1 Low-residue high-extraction production of sodium dichromate |