| Patents for C22B 59 - Obtaining rare earth metals (1,691) |
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| 12/14/2000 | DE10022677A1 Process for machine and/or metal-removing processing of a rare earth metal alloy comprises preparing a block of a rare earth metal alloy, positioning a grinding wheel having a grinding edge on its peripheral section, and grinding the block |
| 12/13/2000 | EP1059134A1 Process for the production of metallic powders, powders thus prepared and compacts including these powders |
| 12/07/2000 | WO2000073521A1 Method for separating in an aqueous medium lanthanides and/or actinides by combined complexing-nanofiltration, and novel complexing agents therefor |
| 11/21/2000 | US6149861 Methods for manufacturing R-Fe-B type magnet raw material powder and R-Fe-B type magnet |
| 11/08/2000 | CN1272946A Feedstock powder for R-Fe-B magnet and process for producing R-Fe-B magnet |
| 11/02/2000 | EP1049190A1 Method and system for recovering valuable metal from waste storage battery |
| 09/28/2000 | DE19913550A1 Rare earth oxysulfide powder, used to produce a scintillator ceramic for computer tomography or as a phosphor for x-ray screens, is produced by rare earth oxysulfate reduction |
| 08/17/2000 | WO2000047786A1 Rare earth magnet for mri scanner made from treated pr-nd bearing ore residuum |
| 08/17/2000 | WO2000047785A1 Processing route for direct production of mixed rare earth metal oxides by selective extraction |
| 08/16/2000 | CN1263164A Technological process for directly producing mixed rare earth oxide |
| 08/09/2000 | EP1026706A1 FEEDSTOCK POWDER FOR R-Fe-B MAGNET AND PROCESS FOR PRODUCING R-Fe-B MAGNET |
| 07/25/2000 | US6093376 Selective separation of rare earth elements by ion exchange in an iminodiacetic resin |
| 07/19/2000 | EP1019552A1 Method for separating trivalent actinides from at least one trivalent lanthanide by means of (bis)aryldithiophosphonic acid as organophosphate as synergist |
| 07/06/2000 | WO2000039514A1 Method and device for melting rare earth magnet scrap and primary molten alloy of rare earth magnet |
| 06/14/2000 | EP1007747A1 Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes |
| 06/13/2000 | US6075130 Calixarene containing upper rim and a lower rim, atleast one ionizable group attached to lower rim and a radionuclide ion from lantahnide elements bound to ionizable group |
| 06/06/2000 | US6071323 Given amount of rare earth element and transition metal element including at least one of iron, nickel and cobalt, homogeneous sintered structure; regenerating by pulverizing, mixing with specific alloy blend used to make target, firing |
| 05/24/2000 | CN1052760C Recovering method for compound containing rare-earth elements can be reused |
| 05/04/2000 | WO2000025382A1 Method and system for recovering valuable metal from waste storage battery |
| 03/21/2000 | CA2123382C Processing of compositions containing precious metals and other valuable elements for recovery purposes |
| 03/08/2000 | CN1246540A Process for decomposing rare-earth ore by acid method |
| 02/02/2000 | CN1243168A Process for producing metal dysprosium |
| 12/23/1999 | WO1999065824A1 Method for separating trivalent lanthanide cations by selective complexing |
| 12/08/1999 | CN1237643A Recovering method of valuable composition from rare earth element-containing material and alloy powder obtained therefrom |
| 11/25/1999 | WO1999060580A1 FEEDSTOCK POWDER FOR R-Fe-B MAGNET AND PROCESS FOR PRODUCING R-Fe-B MAGNET |
| 11/25/1999 | DE19922144A1 Valuable composition recovered from a rare earth element-containing material especially a sintered magnet or sputter target material |
| 11/24/1999 | CN1236017A Ammonium chloride process for extracting rare-earth chloride from bastnaesite fine ore |
| 11/09/1999 | US5980841 Method for recovering reusable elements from rare earth-nickel alloy |
| 10/26/1999 | US5972074 Decarbonizing misch metal or alloy by mixing with titanium, zirconium or oxides and melting in inert atmosphere to form carbides of titanium or zirconium |
| 10/12/1999 | US5966584 Method of separating trivalent actinides from trivalent lanthanides |
| 10/05/1999 | US5961938 Adding a diluted nitric acid solution to a slurry of the rare earth-iron alloy containing cobalt, while maintaining ph of a resulting mixture at 5 or higher; filtering an undissolved residue containing iron from a rare earth-containing nitrate |
| 08/31/1999 | US5945342 Mixing diphosphonic acid-substituted resin having adsorbed actinide, rare earth, or heavy metal elements with low boiling point oxidizing acid; irradiating mixture to dissolve portion of resin releasing elements; for accurate analysis |
| 08/18/1999 | CN1226286A Method and apparatus for back-extracting metal chelates |
| 07/27/1999 | CA2015057C Recovery of cesium chloride from pollucite ore |
| 07/08/1999 | DE19858560A1 Caustic soda stripping of rare earth-loaded liquid ion exchanger used in solvent extraction |
| 06/17/1999 | WO1999024396A8 Ion binding compounds, radionuclide complexes, methods of making radionuclide complexes, methods of extracting radionucleides, and methods of delivering radionuclides to target locations |
| 06/16/1999 | CN1219978A Recovery method of metal values |
| 05/20/1999 | WO1999024396A1 Ion binding compounds, radionuclide complexes, methods of making radionuclide complexes, methods of extracting radionucleides, and methods of delivering radionuclides to target locations |
| 05/12/1999 | EP0914482A1 Method and apparatus for back-extracting metal chelates |
| 03/25/1999 | WO1999014386A1 Method for separating trivalent actinides from at least one trivalent lanthanide by means of (bis)aryldithiophosphonic acid as organophosphate as synergist |
| 03/18/1999 | DE19834152A1 Separating trivalent actinide elements from lanthanides |
| 03/04/1999 | WO1999010545A1 Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes |
| 02/17/1999 | CN1042145C Method of recovering cerium from solid mixture containing cerium oxide and fluoride |
| 12/30/1998 | EP0792247A4 Metal and fluorine values recovery from mineral ore treatment |
| 11/04/1998 | EP0649912B1 Method for collecting valuable metal from nickel-hydrogen secondary cell |
| 08/26/1998 | EP0860187A2 Multi-stage solvent extration of metal value |
| 08/11/1998 | US5792357 Method and apparatus for back-extracting metal chelates |
| 07/28/1998 | US5787332 Process for recovering tantalum and/or niobium compounds from composites containing a variety of metal compounds |
| 07/14/1998 | US5779877 Recycling of CIS photovoltaic waste |
| 05/26/1998 | US5756056 Process for recovering rare earth metal from oxide ore by concentration and separation |
| 04/29/1998 | EP0692035B1 Recovery of cerium from fluoride-containing ores |
| 04/16/1998 | WO1998015667A1 Reduction-melting process to form rare earth-transition metal alloys and the alloys |
| 04/08/1998 | EP0834584A1 Recovery of tantalum and/or niobium from metalfluoride containing materials and ore residues with use of sulfuric acid roasting |
| 03/26/1998 | CA2212714A1 Process for recovering tantalum and/or niobium compounds from compositescontaining a variety of metal compounds |
| 03/17/1998 | US5728355 Method for recovering reusable rare earth compounds |
| 02/05/1998 | WO1998004754A1 Method and apparatus for back-extracting metal chelates |
| 02/05/1998 | CA2260831A1 Method and apparatus for back-extracting metal chelates |
| 01/13/1998 | US5708958 Method of separating trivalent actinides and rare earth elements |
| 12/31/1997 | CN1168926A Method for recovering valuable elements from rare-earth and ferrous alloy |
| 12/17/1997 | CN1167832A Method for recovering reusable elements from rare earth-nickel alloy |
| 11/25/1997 | US5690889 Production method for making rare earth compounds |
| 10/02/1997 | WO1997036011A1 Recovery of metal values |
| 09/03/1997 | EP0792247A1 Metal and fluorine values recovery from mineral ore treatment |
| 08/20/1997 | EP0790322A1 Method for recovering reusable elements from rare earth-nickel alloy scrap |
| 08/20/1997 | EP0790321A1 Method for recovering reusable elements from rare earth-iron alloy scrap containing cobalt |
| 08/13/1997 | CN1156761A Recovering method for compound containing rare-earth elements can be reused |
| 06/17/1997 | US5639433 Extraction of rare earth elements using alkyl phosphinic acid or salt/alkyl or aryl phosphonic acid or ester blends as extractant |
| 05/28/1997 | EP0775753A1 Process for recovering scandium from nickel-containing oxide ore |
| 05/07/1997 | CN1034818C Extractant for separating rare-earth metal |
| 04/22/1997 | US5622679 Extraction of rare earth elements using alkyl phosphinic acid or salt/tetraalkylammonium salt as extractant |
| 01/21/1997 | US5595714 Complexing gadolinium with polyaminocarboxylic acids, acidification, adding oxalate ions, filtration the gadolinium oxalate, basification and precipitation |
| 11/20/1996 | EP0743283A2 Recovery of gadolinium and its complexing agents from aqueous solutions containing their complexes |
| 09/04/1996 | EP0729437A1 Metal and fluorine values recovery from mineral ore treatment |
| 07/23/1996 | CA2051838C Metallothermic reduction of rare earth fluorides |
| 07/02/1996 | US5531970 Calcium fluoride sediments, complexing, reacting with acid, separating primary values of ta and nb from secondary values of u or th, solubilizing |
| 05/30/1996 | WO1996015987A1 Metal and fluorine values recovery from mineral ore treatment |
| 05/30/1996 | CA2205482A1 Metal and fluorine values recovery from mineral ore treatment |
| 04/24/1996 | CN1031650C Method of making high-purity rare earth metal using magnetic suspension cold boat technology |
| 02/20/1996 | US5492680 Extraction with sulfuric acid solution; scrubbing; stripping |
| 01/17/1996 | EP0692035A1 Recovery of cerium from fluoride-containing ores |
| 12/26/1995 | US5478664 Method of recovering reusable metals from nickel-hydrogen rechargeable battery |
| 11/28/1995 | CA2039647C Process for the separation of yttrium |
| 10/03/1995 | US5454914 Method of removal of heavy metal from molten salt in IFR fuel pyroprocessing |
| 08/01/1995 | US5437709 Vacuum sublimation or distillation |
| 07/18/1995 | US5433931 Recovery of cerium |
| 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 | CN1028543C Process for separation of yttrum |
| 04/26/1995 | EP0649912A1 Method for collecting valuable metal from nickel-hydrogen secondary cell |
| 02/14/1995 | US5389123 Method for continuously recovering metals using a dual zone chemical reactor |
| 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 |
| 12/21/1994 | EP0629712A1 A process for treating compositions containing noble metals and, optionally, other valuable elements in order to recover said valuables |
| 12/13/1994 | US5372794 Process for the separation of certain elements from aqueous solutions resulting from the reprocessing of spent nuclear fuels |
| 11/29/1994 | US5368736 Process for the separation and purification of yttrium-90 for medical applications |
| 10/18/1994 | US5356538 Supercritical fluid extraction |
| 10/13/1994 | WO1994023075A1 Recovery of cerium from fluoride-containing ores |
| 10/13/1994 | WO1994023073A1 Method for collecting valuable metal from nickel-hydrogen secondary cell |
| 10/05/1994 | CN1093115A Recovery of cerium from fluoride-containing ores |
| 09/28/1994 | CN1026016C Process for extracting scandium from ore |