| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 02/22/1984 | EP0100865A1 Process for the production of a hydrolyzable titanyl sulphate solution |
| 02/21/1984 | US4432953 Leaching cobalt from spent hydroprocessing catalysts with sulfur dioxide |
| 02/21/1984 | US4432950 Recovery of refractory metal values from scrap cemented carbide |
| 02/21/1984 | US4432949 Precipitating vanadium by cooling, extraction of nickel with hydroxyoxime, cobalt with oximes, dioximes, or diketones, and molybdenum and tungsten with tertiary amine |
| 02/21/1984 | CA1162663A1 Process for separating copper and iron minerals from molybdenite |
| 12/28/1983 | EP0097135A1 Apparatus and method for producing purified refractory metal from a chloride thereof |
| 12/27/1983 | US4423013 Process for the purification of solutions containing alkali metal carbonate, sulphate, hydroxide or possibly hydrogen carbonate, and one at least of the metals vanadium, uranium and molybdenum |
| 12/21/1983 | EP0096241A1 Production of metal chlorides |
| 12/13/1983 | US4420464 Treatment with oxidizing gas in alkali metal carbonate metl |
| 12/13/1983 | US4420331 Flotation, solvent extraction |
| 12/13/1983 | CA1158414A1 Process for manufacturing a stable titanyl sulfate solution |
| 11/30/1983 | EP0095358A1 Method of recovering metal values from superalloy scrap |
| 11/29/1983 | CA1157662A1 Partitioning of refractory metals from oxidation resistant scrap alloy |
| 11/22/1983 | US4416693 Hydrogen or carbon monoxide as reducing agent |
| 11/22/1983 | CA1157230A1 Process for manufacturing titanium compounds |
| 11/22/1983 | CA1157229A1 Process for manufacturing titanium compounds using a reducing agent |
| 11/15/1983 | CA1156953A1 Lime addition to heavy crude oils prior to coking |
| 11/15/1983 | CA1156952A1 Formation of coke from heavy crude oils in the presence of calcium carbonate |
| 11/01/1983 | US4412860 Melting with tin, solidifying, dissolving uranium with hydrochloric acid |
| 10/19/1983 | EP0091560A1 Process for producing titanium dioxide concentrates |
| 10/18/1983 | CA1155305A1 Process for treating zircon |
| 10/12/1983 | EP0091414A1 Apparatus and method for production of refractory metal from a chloride thereof |
| 10/11/1983 | CA1154969A1 Process using sulphate reagent for recovering vanadium from cokes derived from heavy oils |
| 10/04/1983 | US4407781 Method of separating molybdenum from uranium |
| 09/27/1983 | CA1154234A1 Process for purifying solutions containing alkaline carbonates, sulfates, hydroxides or eventually hydrogen carbonates, and at least one of vanadium, uranium or molybdenum metals |
| 09/20/1983 | US4405572 Recovery of molybdenum |
| 09/20/1983 | US4405571 Process for selective dissolution of molybdenum in the presence of tungsten |
| 09/13/1983 | US4403769 Vacuum separator |
| 09/06/1983 | CA1153210A1 Process and unit for preparing alloyed or not, reactive metals by reduction of their halides |
| 08/30/1983 | US4401631 Process for the recovery of molybdenum from mixtures of molybdenum compounds with other metallic compounds |
| 08/30/1983 | US4401573 Formation of chromium hydroxide from chromium oxide |
| 08/30/1983 | US4401467 Continuous titanium process |
| 08/30/1983 | CA1152752A1 Chlorination of titaniferous ore using porous carbon |
| 08/17/1983 | EP0085728A1 Improved grinding of titaniferous ores to enhance recovery of titanium dioxide |
| 08/16/1983 | CA1151880A1 Processing of titaniferous materials |
| 08/10/1983 | EP0085345A1 Process for producing titanium dioxide concentrates |
| 08/09/1983 | US4397682 Process for preparing metals from their fluorine-containing compounds |
| 08/09/1983 | CA1151429A1 Process for beneficiation of oxidic ores |
| 08/02/1983 | CA1150953A1 Liquid-liquid extraction of metal values from aqueous solution |
| 08/02/1983 | CA1150952A1 Process for extracting titanium values from titaniferous bearing material |
| 07/27/1983 | EP0028648B1 Method for recovering molybdenum from tungsten solutions |
| 07/26/1983 | CA1150518A1 Recovering non-volatile metals from dust containing metal oxides |
| 07/12/1983 | US4393028 Basification to solubilize molybdate, precipitation of uranate |
| 07/05/1983 | US4391714 Manganese dioxide particle bed |
| 06/29/1983 | EP0082351A1 Process for the elimination of molybdenum from aqueous solutions of manganese salts |
| 06/28/1983 | US4390365 Process for making titanium metal from titanium ore |
| 06/21/1983 | US4389391 Process for beneficiating titaniferous ores |
| 06/21/1983 | US4389378 Heating in an oxidizing atmosphere at a temperature below the melting point of the sulfate; leaching with water |
| 06/21/1983 | CA1148362A1 Method for recovering molybdenum from tungstate solutions |
| 06/14/1983 | CA1147969A1 Recovery of chromium from scrap |
| 06/08/1983 | EP0080996A2 Process for recovering metals from acid solutions of their salts |
| 05/24/1983 | US4384885 Process for the recovery of metals from catalysts |
| 05/03/1983 | US4382069 Multiple batch recovery of acid dissolved molybdenum |
| 05/03/1983 | US4382068 Method for selective recovery of molybdenum and vanadium values from spent catalysts |
| 05/03/1983 | CA1145552A1 Method to oxidize ti su 3 xx during the sulfuric acid digestion of titaniferous slags |
| 04/12/1983 | CA1144377A1 Recovery of titanium metal values |
| 04/12/1983 | CA1144376A1 Leaching process for niobium and (or) tantalum minerals |
| 04/05/1983 | US4379127 Method of recovering molybdenum oxide |
| 04/05/1983 | CA1143952A1 Process for recovering metals from catalysts for the hydrodesulfurization of hydrocarbons |
| 03/23/1983 | EP0074871A1 Process for the physical separation of the metallic phase from the slag in an induction furnace |
| 03/22/1983 | US4377410 Sulfiding |
| 03/22/1983 | CA1143166A1 Recovery of nickel and other metallic values from waste |
| 03/15/1983 | US4376647 Heating with water vapor to form hydrogen sulfide, reacting hydrogen sulfide with lime to form calcium sulfide followed by separation |
| 02/22/1983 | US4374805 Reductants for reducing metals in acid media |
| 02/17/1983 | WO1983000509A1 Selective purification of arsenical material during an alkaline process for the treatment of a uranium-bearing and/or molybdenum-bearing mineral by means of a magnesium compound |
| 02/15/1983 | US4374100 Recovery and recycle of molybdenum values from coal liquefaction residue |
| 02/15/1983 | US4373947 Process for the preparation of alloy powders which can be sintered and which are based on titanium |
| 02/09/1983 | EP0071351A1 A transferred-arc plasma reactor for chemical and metallurgical applications |
| 01/11/1983 | US4368072 Iodide cell vapor pressure control |
| 12/21/1982 | US4364908 Method for purifying titanyl hydrate |
| 12/14/1982 | US4363722 Process and apparatus for treating titanium machining scrap |
| 12/07/1982 | US4362557 Purifying titanium-bearing slag by promoted sulfation |
| 11/30/1982 | CA1136422A1 Recovery of tungsten values from tungsten- bearing materials |
| 11/17/1982 | EP0064966A1 Vacuum device for separating refractory metal from magnesium metal and/or magnesium chloride mixed therewith |
| 11/17/1982 | EP0064903A1 Method for the manufacture of titanium-aluminium alloys |
| 11/16/1982 | US4359449 Process for making titanium oxide from titanium ore |
| 11/11/1982 | WO1982003849A1 Tungsten recovery from tungsten ore concentrates by caustic digestion |
| 10/28/1982 | WO1982003620A1 Method for extracting arsenic from solutions containing alcaline carbonates, sulphate, optionally hydroxide, as well as at least one of vanadium, uranium and molybdenum metals |
| 10/27/1982 | EP0063555A2 Chlorinator furnace and method for producing tetrachloride of such metals as titanium and zirconium |
| 10/27/1982 | EP0063552A1 Improvements in a method and an apparatus for producing titanium metal from titanium tetrachloride |
| 10/26/1982 | US4356029 Alkali(ne earth) metal reactant, projecting, melting, blowing, dropping |
| 10/26/1982 | US4356028 In situ phosphorus addition to tantalum |
| 10/26/1982 | CA1134149A1 Moving bed chlorination of bauxite and ilmenite |
| 10/20/1982 | EP0062804A2 Process for eliminating molybdenum from aqueous salt solutions |
| 10/19/1982 | US4355006 Process for the oxidative dissociation of chrome-containing ores |
| 10/12/1982 | US4353881 Tungsten recovery from tungsten ore concentrates by caustic digestion |
| 10/12/1982 | US4353880 Tungsten recovery from tungsten ore concentrates by caustic digestion |
| 10/12/1982 | US4353879 Tungsten recovery from tungsten ore concentrates by caustic digestion |
| 10/12/1982 | US4353878 Tungsten recovery from tungsten ore concentrates by caustic digestion |
| 10/06/1982 | EP0061976A1 Purification of ammonium tungstate solutions |
| 09/28/1982 | US4351808 Forming a slurry and extraction of tungsten oxide |
| 09/22/1982 | EP0060376A1 Recovery and recycle of molybdenum values from coal residue |
| 08/31/1982 | US4347084 Electrodes of sintered tantalum powder of fine grain size and process of production |
| 08/24/1982 | US4346061 Purification of ammonium tungstate solutions |
| 08/10/1982 | US4343775 Reduction of iron-containing material with microporous anthracite |
| 08/10/1982 | US4343774 Method for recovering valuable metals from deactivated catalysts |
| 08/05/1982 | WO1982002540A1 Wet oxidation of organic matter |
| 08/05/1982 | WO1982002539A1 Autoclave soda digestion of refractory scheelite concentrates |
| 08/03/1982 | US4342728 Process for digesting tungsten ores containing organic matter |
| 07/28/1982 | EP0056743A1 Recovery of molybdenum as an aqueous solution |