| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 03/10/1987 | US4649031 Process for recovering rare metals from the combustion residue of coal by digestion |
| 03/04/1987 | EP0212711A2 Process for the reduction of fluorides of silicon, titanium, zirconium or uranium |
| 03/03/1987 | CA1218523A1 Apparatus for preparing high melting point high toughness metals |
| 02/24/1987 | US4645651 Sodium carbonate, sodium sulfate comminution, presipitation, melting leaching |
| 02/24/1987 | US4645533 Tantalum powder and method of making |
| 02/12/1987 | WO1987000826A1 Chlorination of ores containing alkali or alkaline earth values |
| 02/04/1987 | EP0210486A1 A method of producing composite nuclear fuel cladding |
| 02/04/1987 | EP0210236A1 Process for the production of high purity zirconia |
| 02/03/1987 | US4640823 Alkaline leaching of vanadium bearing residues |
| 01/31/1987 | CN85102378A Production of vanadium from atomized vanadium residue by calcination and water extraction in one run |
| 01/29/1987 | DE3526491A1 Process for working up vanadium-containing used catalysts |
| 01/28/1987 | EP0209760A1 Process for the preparation of alkali metal fluotitanates |
| 01/24/1987 | CN85101496A High density ion exchange resin for molybdenum recovery |
| 01/22/1987 | DE3524703A1 Process for preparing low-phosphorus vanadium compounds from high-phosphorus vanadium slags |
| 01/21/1987 | EP0209471A1 Process for separating by precipitation molybdenum contained in solutions of uranyl nitrate |
| 01/21/1987 | EP0209470A1 Process for separating by precipitation molybdenum contained in sulfuric or nitric solutions of uranium |
| 01/21/1987 | EP0209272A1 Extracting metal values from metal containing particles |
| 01/20/1987 | US4637920 Treating with sulfuric acid, reducing with iron scraps, precipitation with ammonia |
| 01/20/1987 | US4637831 Process for reduction of zirconium, hafnium or titanium using a zinc or tin seal |
| 01/07/1987 | EP0207403A2 Process for the preparation of high value titanium dioxide with sulfuric acid leaching |
| 01/06/1987 | US4634579 Precipitation |
| 01/06/1987 | US4634467 Hydrometallurgical process for copper recovery |
| 12/24/1986 | CN85104559A Process for the separation of metal compounds by reduction |
| 12/23/1986 | CA1215677A1 Method of producing metals or metal alloys and an arrangement therefor |
| 12/23/1986 | CA1215543A1 Process for making titanium metal from titanium ore |
| 12/16/1986 | US4629607 Preheating in oxygen-free atmosphere |
| 12/16/1986 | US4629606 Recovery of tungsten compounds |
| 12/16/1986 | US4629506 Process for the production of ferrochromium |
| 12/16/1986 | US4629503 Process for the recovery of tungsten in a pure form from tungsten-containing materials |
| 12/10/1986 | EP0204564A2 Method of separating molybdenum or tungsten from non-volatile contaminants |
| 12/10/1986 | EP0204298A2 Process for producing niobium metal of an ultrahigh purity |
| 12/09/1986 | US4627148 Irradiation, melting under vacuum of zirconium |
| 12/04/1986 | WO1986007097A1 Metal halide reduction with molten sodium/potassium alloy |
| 12/02/1986 | US4626425 By adding hexamethylene tetramine to form a complex; precipitation |
| 12/02/1986 | US4626280 Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material |
| 11/25/1986 | US4624714 Microstructural refinement of cast metal |
| 11/25/1986 | US4624703 Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material |
| 11/20/1986 | EP0201752A2 Process for preparing titanium dioxide concentrates |
| 11/19/1986 | CN86101735A Metallurgical composites and processes |
| 11/12/1986 | CN86200847U Combined reduction and distillation device for producing active metals with high melting point |
| 11/11/1986 | US4622079 Method for the dispersion of hard alpha defects in ingots of titanium or titanium alloy and ingots produced thereby |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 11/05/1986 | EP0200318A1 Further improvements in tungsten recovery |
| 11/05/1986 | EP0200317A2 Improvements in tungsten recovery |
| 11/04/1986 | CA1213418A1 Process for making titanium dioxide concentrates |
| 10/28/1986 | US4619815 Chlorination of iron-containing metaliferous material |
| 10/28/1986 | US4619697 Sputtering target material and process for producing the same |
| 10/28/1986 | US4619695 Process for producing high-purity metal targets for LSI electrodes |
| 10/28/1986 | US4619690 Reacting ore with sulfur oxide and oxygen; leaching |
| 10/15/1986 | EP0197507A2 Process for the preparation of titanium dioxide |
| 10/15/1986 | EP0197473A2 Process for the preparation of titanium dioxide |
| 10/15/1986 | EP0197444A2 Recovery of cobalt and chromium |
| 10/15/1986 | EP0197271A1 Methods for preparing high-purity molybdenum or tungsten powder and high-purity oxides powder of the same |
| 10/14/1986 | CA1212549A1 Production of metal chlorides |
| 10/08/1986 | EP0196516A1 Method for the dispersion of hard alpha defects in ingots of titanium for titanium alloy and ingots produced thereby |
| 10/01/1986 | CN85100396A Method and equipment for continuous countercurrent fluidized leaching of chromite basic roasting groy |
| 09/30/1986 | CA1211931A1 Apparatus for preparing high-melting-point high- toughness metals |
| 09/24/1986 | CN86100799A Method for the dispersion of hard alpha defects in ingots of titanium or titanium alloy and ingots produced thereby |
| 09/23/1986 | US4613366 Continuous reactive metal reduction using a salt seal |
| 09/23/1986 | US4613361 High-temperature pretreatment by means of an alkaline aqueous solution of ores having an argillaceous gangue containing at least one usable element |
| 09/17/1986 | EP0194544A2 Recirculating process for sulfuric acid containing metallic sulfates |
| 09/17/1986 | EP0194346A1 Recovery of tungsten from ammoniacal solutions |
| 09/10/1986 | CN86100031A Processing of calcium-containing tungstenic ore |
| 09/09/1986 | US4610720 Method for preparing high purity vanadium |
| 09/03/1986 | CN85101961A Recovery of co-existing mo, bi, cu in tungsten ore |
| 09/02/1986 | CA1210746A1 Recovering metal compounds from used catalysts obtained from hydroprocessing hydrocarbon feedstocks |
| 08/27/1986 | CN85100350A Processing of tungsten ore |
| 08/26/1986 | US4608084 Recovery of cobalt and chromium |
| 08/14/1986 | WO1986004614A1 Process for the production of high purity zirconia |
| 08/05/1986 | US4604265 Oxidation, then removal of volatilized rhenium oxide |
| 07/30/1986 | CN85100737A To extract rhenium and tungsten by using primary amine-neutral donor reagent |
| 07/30/1986 | CN85100731A Recovery of valuable metals from industrial waste |
| 07/29/1986 | US4602947 Process for producing titanium metal and titanium metal alloys |
| 07/22/1986 | US4601890 Preparing ammonium molybdate |
| 07/16/1986 | EP0187589A1 Process for recovering molybdenum-99 from a target of an irradiated uranium alloy |
| 07/08/1986 | US4599224 Recovery of molybdenum from molybdenum disulfide |
| 07/08/1986 | US4599223 Separation of tungsten from rhenium |
| 07/08/1986 | US4599222 Recovery of tungsten and rhenium |
| 07/08/1986 | EP0129555A4 Process and apparatus for obtaining silicon. |
| 07/02/1986 | EP0186370A2 Titanium dioxide pigment production from ilmenite |
| 07/01/1986 | US4597948 Apparatus for obtaining silicon from fluosilicic acid |
| 06/25/1986 | EP0185550A2 Method of purifying tantalum |
| 06/24/1986 | US4596701 Process for purifying molybdenum trioxide |
| 06/17/1986 | US4595573 Treating metal compound to be chlorinated in refractory material reactor, pressurizing, chlorinating with continuous stream of chlorine gas |
| 06/17/1986 | US4595412 Heating ammonium molybdate salt in reducing atmosphere to convert salt to molybdenum dioxide, heating to obtain metal |
| 06/05/1986 | WO1986003188A1 Recovering vanadium values from ammonium bicarbonate solution using heat, sulfuric acid, and ammonium sulfate |
| 06/03/1986 | CA1205291A1 Recovery of titanium values |
| 05/07/1986 | EP0180229A2 Process for recovery of zirconium and acid from spent etching solutions |
| 05/06/1986 | US4587109 Process for the separate recovery of molybdenum and vanadium |
| 04/23/1986 | EP0178526A2 Apparatus for the reduction of iron and vanadium in phosphoric-acid solutions |
| 04/22/1986 | US4584185 Precipitating tungsten with hydrochloric acid, then precipitating rhenium with sulfide compound |
| 04/22/1986 | US4584184 Separation and recovery of molybdenum values from uranium process waste |
| 04/22/1986 | US4584018 Method for production of refractory metal from a chloride thereof |
| 04/15/1986 | US4582688 Process for recovery of mineral values |
| 04/15/1986 | US4582530 High surface area and reduced particle size using sulfur or sulfurcompounds |
| 04/15/1986 | CA1203082A1 Purification process for aqueous uraniferous solutions containing zirconium and/or hafnium among other impurities |
| 04/15/1986 | CA1203081A1 Process for the separation and recovery of molybdenum and uranium from leach solution using ion exchange |
| 04/01/1986 | US4579721 Process for recovering metals from waste |
| 04/01/1986 | CA1202599A1 Upgrading titanium, zirconium and hafnium powders by plasma processing |
| 04/01/1986 | CA1202472A1 Method of producing tungsten oxide |