| Patents for C22B 59 - Obtaining rare earth metals (1,691) |
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| 06/02/1987 | CA1222376A1 Global recovery of uranium, yttrium, thorium and rare earths from a phosphated mineral in the course of a wet treatment process for the preparation of phosphoric acid |
| 05/27/1987 | EP0223687A1 Process for the production of rare earth hydroxides by treatment of minerals which contain rare earth phosphates |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 04/01/1987 | EP0216688A1 Process for treating rare-earth ores |
| 04/01/1987 | EP0216687A1 Process for treating rare-earth ores |
| 03/18/1987 | CN86105892A Process for treatment of ores of rare earth metals |
| 03/18/1987 | CN86105862A Process for treatment of rare earth metals |
| 03/17/1987 | US4650652 Dissolving, precipitation of oxalates, baking |
| 03/10/1987 | US4649031 Process for recovering rare metals from the combustion residue of coal by digestion |
| 03/03/1987 | US4647438 Separation of rare earth values by liquid/liquid extraction |
| 02/11/1987 | CN85106255A Method of extract scandium from rare-earth mineral |
| 02/04/1987 | EP0210934A1 Process for separating and valorizing rare-earth metals and uranium of an uranium tetrafluoride concentrate |
| 02/04/1987 | CN85102248A Process for extracting raze-earth by groups with solvent and enriching terbium |
| 01/17/1987 | CN85102244A Phosphonates lle separation of rare earth elements |
| 01/17/1987 | CN85102220A Separation of high purity yttrium by solvent extraction |
| 01/17/1987 | CN85101652A Liquid-liquid extraction process for separating rare-earth elements |
| 01/13/1987 | US4636369 Acidification, aluminum and iron compounds |
| 01/13/1987 | US4636353 Novel neodymium/iron alloys |
| 01/10/1987 | CN85102270A Process for seperation of yttrium and preparation of rare-earths mixture at low content of the same by solvent extraction |
| 12/10/1986 | CN85103341A Continuous horizontal vacuum band-type filter machine and percolation filtration-dipping process |
| 12/02/1986 | US4626280 Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material |
| 11/25/1986 | US4624703 Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material |
| 11/19/1986 | CN85104034A Direct extn. of fluorescent grade europium oxide |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 10/22/1986 | EP0198736A1 Process for the separation of cerium and rare earths |
| 10/08/1986 | CN86100169A Process for purification of aqueous solutions of rare earth salts by liquid-liquid extraction |
| 10/01/1986 | CN85100813A Metallothermic reduction of rare earth oxides |
| 09/24/1986 | CN86101332A Process for separation of cerium and rare earths |
| 09/24/1986 | CN85101885A Separation of mixed rare-earth elements by extraction |
| 09/17/1986 | CN85102529A Collecting rare-earth from ion type rare-earth ore and the process for its comprehensive |
| 09/17/1986 | CN85102210A Process for seperation of mixed rare-earths by ammoniated ehehpa |
| 09/03/1986 | CN85103967A Smelting of rare earth fine ore briquettes (or lumps) to prepare rare earth fine slag and niobium ferric phosphorate |
| 08/20/1986 | CN85109738A Rare earth alloy powder and process for producing the same |
| 07/23/1986 | EP0188394A1 Process for purifying an aqueous solution of rare-earth salt by liquid-liquid extraction |
| 07/08/1986 | US4599175 Process for separating and purifying metallic elements by displacement chromatography |
| 06/18/1986 | EP0184722A1 Rare earth alloy powders and process of producing same |
| 03/25/1986 | US4578242 Metallothermic reduction of rare earth oxides |
| 03/11/1986 | CA1201597A1 Process for the extraction and separation of uranium, thorium and rare earths involving treatment of their aqueous chloride solutions |
| 02/05/1986 | EP0170373A1 Metallothermic reduction of rare earth oxides |
| 02/05/1986 | EP0170372A1 Metallothermic reduction of rare earth oxides with calcium metal |
| 12/03/1985 | CA1197382A1 Process for separating the actinides and lanthanides present in the trivalent state in an acid aqueous solution |
| 10/09/1985 | EP0156869A1 Process for the recovery of valuable metals, particularly rare earths and similar metals, from a carbonate-containing raw material |
| 10/02/1985 | EP0156735A1 Process for separating rare earths by liquid-liquid extraction |
| 04/30/1985 | US4514367 Method for separating rare earth metals |
| 03/28/1985 | WO1985001300A1 Process for the recovery of valuable metals, particularly rare earths and similar metals, from a carbonate-containing raw material |
| 03/26/1985 | CA1184387A1 Process for recovering rare metals from the combustion residue of coal by digestion |
| 03/13/1985 | EP0134162A1 Alloys of neodymium and process for their production |
| 01/29/1985 | US4496523 Solvent extraction by forming complex of acid, nitrogen compound, and metal |
| 09/25/1984 | CA1174857A2 Recovery of cerium from ion exchange resin |
| 07/24/1984 | US4461748 Using organophosphorus compounds |
| 05/23/1984 | EP0109327A1 Process for the complete recovery of uranium, yttrium, thorium and rare earth metals from a phosphate ore while preparing wet process phosphoric acid |
| 05/08/1984 | CA1166874A1 Production of yttrium |
| 03/27/1984 | US4439232 Samarium metal production |
| 03/20/1984 | US4438078 Forming the oxalate of gadolinium, precipitation, pyrolysis; elution of filtrate, precipitation of oxalate, pyrolysis |
| 02/21/1984 | US4432948 Adding hydrogen peroxide, passing through cation exchange column, acid stripping, precipitation with oxalic acid, and firing to give yttrium and europium oxides |
| 11/29/1983 | US4417965 Method of treating a rare-earth mineral |
| 10/25/1983 | US4411793 Process for the separation of elements by chromatography |
| 06/28/1983 | US4390507 Process for recovering yttrium and lanthanides from wet-process phosphoric acid |
| 05/31/1983 | US4386056 Ion exchanging, precipitation of oxalates |
| 05/24/1983 | CA1146761A1 Treatment for rare earthes and gallia oxides mixtures |
| 05/18/1983 | EP0079258A1 Process for extracting and separating uranium, thorium and rare earths by treating aqueous solutions of the chlorides of said elements |
| 03/08/1983 | CA1142364A1 Global recuperation process of uranium, rare earths, thorium and yttrium from acid solutions |
| 02/22/1983 | US4374805 Reductants for reducing metals in acid media |
| 01/19/1983 | EP0070226A1 Process for separating trivalent actinides from trivalent lanthanides in an acidic aqueous solution |
| 12/01/1982 | EP0021990B1 Process for treating mixtures of rare earth oxides and gallium oxides |
| 08/10/1982 | CA1129211A1 Recovery and separation of gadolinium and gallium |
| 06/30/1982 | EP0054969A1 A process for the separation of elements by chromatography |
| 06/01/1982 | CA1124506A1 Process for purifying rare-earth compositions using fractional sulfate precipitation |
| 04/27/1982 | CA1122420A1 Rare earth separation process |
| 12/30/1981 | EP0042747A1 Method of treating rare-earth minerals or concentrates |
| 11/04/1981 | EP0039119A1 Process for recovering yttrium and lanthanides from wet-process phosphoric acid |
| 05/05/1981 | US4265862 From radioactive impurities |
| 04/01/1981 | EP0026132A1 Process for global recovery of uranium, rare earth metals, thorium and yttrium from an acid solution |
| 03/10/1981 | US4255394 Process for the separating of rare earths |
| 02/10/1981 | US4249989 Isolating solid substances from a vapor and gas mixture and pulps |
| 01/07/1981 | EP0021990A1 Process for treating mixtures of rare earth oxides and gallium oxides |
| 08/20/1980 | EP0014553A1 Process for purifying rare-earth compositions |
| 07/22/1980 | CA1081969A1 Recovery of transplutonium elements from nuclear reactor waste |
| 05/06/1980 | US4201747 Solvent extraction of aqueous solution of rare earth ions and hydroxyethyl ethylenediaminetriacetic acid with tributyl phosphate and organic phosphate |
| 04/15/1980 | US4198231 Recovery and separation of gadolinium and gallium |
| 03/18/1980 | US4193792 Process for Class IIIB metals ore reduction |
| 12/04/1979 | US4177059 Production of yttrium |
| 10/30/1979 | CA1065122A1 Recovery of fluorine, uranium and rare earth metal values from phosphoric acid waste liquors |
| 09/19/1979 | EP0004226A1 Process for separating elements in the group consisting of the lanthanides and yttrium |
| 01/23/1979 | US4135921 Process for the preparation of rare-earth-silicon alloys |
| 08/01/1978 | US4104358 Selective extraction of yttrium ions |
| 05/24/1977 | US4025602 Oxalate precipitation, ion exchanging |
| 04/05/1977 | US4016237 Process for separation of the rare earths by solvent extraction |
| 09/14/1976 | US3980471 Process for class III-B metals ore reduction |
| 03/30/1976 | US3947542 Extraction of niobium, rare earth elements and thorium |
| 02/10/1976 | US3937783 Recovery of fluorine, uranium and rare earth metal values from phosphoric acid by-product brine raffinate |