| Patents for C22B 30 - Obtaining antimony, arsenic or bismuth (1,043) |
|---|
| 12/02/1998 | CN1200770A Method for treatment of mismuth-contg. sulphite ores or concentrates of such ore |
| 10/13/1998 | US5820966 Removal of arsenic from iron arsenic and sulfur dioxide containing solutions |
| 09/29/1998 | CA2081292C Process for the electrochemical recovery of bismuth from an ion exchange eluent |
| 09/17/1998 | WO1998032513A3 Method for separating bi-213 from a solution of radionuclides |
| 09/09/1998 | EP0862658A1 A method for the treatment of bismuth-containing sulphide ores or concentrates of such ore |
| 07/30/1998 | WO1998032513A2 Method for separating bi-213 from a solution of radionuclides |
| 07/15/1998 | EP0815269A4 Improved hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 07/08/1998 | CN1186868A Method and device for preparing stibic white with jamesonite |
| 06/09/1998 | US5762891 Forming arsenic oxide by oxidation of arsenic sulfide and having metal impurities |
| 06/09/1998 | US5762683 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 05/27/1998 | EP0713536B1 A process for recovering metals |
| 05/13/1998 | CN1038348C Prodn. of metal from minerals |
| 05/12/1998 | US5750019 Process for hydrometallurgic and electrochemical treatment of sulfur antimony ores with production of electrolytic antimony and elemental sulfur |
| 05/05/1998 | US5749042 Bismuth generator method |
| 01/28/1998 | CN1037197C Method and apparatus for extracting arsenic from waste water containing arsenic |
| 01/07/1998 | EP0815269A2 Improved hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 11/27/1997 | WO1997044499A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 11/27/1997 | CA2252849A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 11/20/1997 | DE19619228A1 Removing antimony from hydrofluoric acid solutions |
| 11/12/1997 | EP0806487A1 Extraction of antimony from sulfide ores by alkaline leaching, recovery of elemental sulfur and electrowinning antimony from fluoborate solution |
| 11/06/1997 | CA2204463A1 Process for hydrometallurgic and electrochemical treatment of sulfur antimony ores with production of electrolytic antimony and elemental sulfur |
| 10/22/1997 | CN1162650A Method for smelting sodium sulfate from refined complex antimony ore |
| 09/10/1997 | CN2262036Y Device for extracting bismuth, removing arsonium and deacidifying from anode mud gold-metallurgy waste liquid |
| 09/10/1997 | CN1158906A Lead-removing method with sulfur for antimony-lead alloy |
| 09/04/1997 | WO1997031861A1 Process for stabilization of arsenic |
| 09/04/1997 | CA2247098A1 Process for stabilization of arsenic |
| 07/30/1997 | CN1155587A Removal of arsenic from rich arsenic content materials |
| 05/28/1997 | CN1150605A Deleading, deselenization and dearsenification process for smelting leaded antimony ore |
| 05/27/1997 | US5632963 Process for the removal of impurity elements from solutions of valuable metals |
| 05/09/1997 | WO1997016574A1 A method for the treatment of bismuth-containing sulphide ores or concentrates of such ore |
| 04/30/1997 | CN1148627A Lead-antimony directly separating technology for jamesonite |
| 04/01/1997 | US5616168 Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 02/13/1997 | WO1997005292A1 Process for the removal of arsenic from bacterial leach liquors and slurries |
| 01/16/1997 | WO1996031629A3 Process for treating impurity streams for disposal |
| 11/06/1996 | CN1134989A Method of recovering antimony and bismuth from copper electrolyte |
| 10/10/1996 | WO1996031629A2 Process for treating impurity streams for disposal |
| 10/10/1996 | CA2216119A1 Process for treating impurity streams for disposal |
| 09/25/1996 | CN1131700A Method of treatment of low-grade antimony ore by melting bath smelting-continuous fuming method |
| 09/17/1996 | US5556447 Detoxification of mercury contaminated soils with vaporization, contacting with carbon, separation and recovering mercury by heating, purging and condensing |
| 08/22/1996 | WO1996025526A1 Process for separating uranium, radium and arsenic from solutions of their compounds |
| 08/13/1996 | US5545800 Decomposition using a reducing agent |
| 07/31/1996 | CN1127793A High-efficiency deleading method and liquid deleading agent for fire refining of antimony |
| 07/18/1996 | DE19505045C1 Verfahren zur Abtrennung von Uran, Radium und Arsen aus Lösungen ihrer Verbindungen Process for the separation of uranium, radium and arsenic from solutions of their compounds |
| 06/19/1996 | CN1124783A Process for removing Pb and Zn from raw Bi |
| 05/29/1996 | EP0713536A1 A process for recovering metals |
| 05/29/1996 | CN1123335A Lead-removing method for ammonium salt refined by antimony affination process |
| 04/24/1996 | CN1031651C Process for refining bismuth |
| 03/12/1996 | US5498398 Using hydrogen sulfide to form copper sulfide, blowing air to oxidize other metals in solution |
| 02/21/1996 | CN1117084A Stibium fire refining deleading agent, its preparation and application |
| 01/31/1996 | CN1030842C Method for obtaining special metal arsenic |
| 01/30/1996 | US5487819 Production of metals from minerals |
| 01/09/1996 | US5482534 Precipitation of iron and arsenic as ferric arsenate and extraction |
| 10/18/1995 | EP0627013B1 Process for separating disturbing elements from solutions of valuable metals |
| 08/22/1995 | US5443622 Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 07/12/1995 | CN1105069A Method and apparatus for extracting arsenic from waste water containing arsenic |
| 07/05/1995 | CN1029242C Smelting process for Sb-Au ores with low content of ferrous sulfide |
| 06/28/1995 | CN1029132C Technology for treatment of antimony noble lead by use of pyrometallurgical method |
| 06/21/1995 | EP0658215A1 Extraction or recovery of metal values |
| 06/21/1995 | CN1103895A Method for prodn. of antimony sesquioxide powder using antimony oxide ore or antimony ore containing sulphur and oxygen |
| 05/31/1995 | CN1028659C Purifying lead electrolytic solution technology |
| 05/31/1995 | CN1028658C Purifying copper electrolytic solution technology |
| 04/20/1995 | CA2118208A1 Method for selectively removing antimony and bismuth from sulphuric acid solutions |
| 04/19/1995 | EP0648709A1 Method for selectively removing antimony and bismuth from sulphuric acid solutions |
| 04/05/1995 | EP0646185A1 Production of metals from minerals |
| 02/16/1995 | WO1995004835A1 A process for recovering metals |
| 02/16/1995 | CA2168036A1 A process for recovering metals |
| 01/03/1995 | US5378328 Electrowinning from hot sulfuric acid solution; corrosion resistant anode and cathode |
| 12/07/1994 | CN1096058A Smelting method of special metallic arsenic |
| 12/07/1994 | CN1026916C Reflecting plasma antimony white furnace with double reaction chamber |
| 11/22/1994 | US5366715 Method for selectively removing antimony and bismuth from sulphuric acid solutions |
| 11/02/1994 | EP0658215A4 Extraction or recovery of metal values. |
| 08/31/1994 | CN1091479A Process for clarifying lead electrolytic solution |
| 08/24/1994 | CN1091157A Production of metal from minerals |
| 06/08/1994 | CN1087687A Technology of purifying copper electrolyte |
| 04/28/1994 | WO1994009165A1 Antimony separation process |
| 04/28/1994 | CA2147249A1 Antimony separation process |
| 03/23/1994 | CN1084224A Industrial mfg. technology for metal arsenic |
| 03/02/1994 | CN1083120A Refinement of antimony by directly feeding natron residue into air furnace |
| 03/01/1994 | US5290528 Contacting with carbonated aqueous solution to leach arsenic |
| 03/01/1994 | US5290338 Antimony separation process |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 11/17/1993 | CN1078502A Production method for superfine antimony trioxide |
| 11/10/1993 | CN1078266A Plasma antimony oxide furnace with reflection type dual-reaction chamber |
| 10/27/1993 | CN1077754A Process for producing high purity micropowder bismuth oxide |
| 10/20/1993 | CN1077499A Process for refining bismuth |
| 10/20/1993 | CN1077498A Technological process of treating antimony rich lead with fire-method |
| 10/15/1993 | CA2093693A1 Process for refining bismuth |
| 09/02/1993 | WO1993017134A1 Process for separating disturbing elements from solutions of valuable metals |
| 08/26/1993 | DE4204994A1 Verfahren zur abtrennung von stoerelementen aus wertmetall-loesungen A method for segregation of interfering elements from valuable metals-loesungen |
| 08/19/1993 | DE4204870A1 Disposing of soil or water loaded with arsenic - by passing soln. through anion exchange resin, eluting resin to recover arsenic, sepg. arsenic from eluate and regenerating resin |
| 08/10/1993 | US5234492 Cupellation |
| 06/09/1993 | CN1072963A Method for preparing low-arsenic pure antimony |
| 06/02/1993 | CN1072729A Smelting method for antimon-gold mine containing low ferrous sulfide (fes) |
| 05/19/1993 | CN1020756C Removal of selenium from antimony |
| 04/29/1993 | WO1993008310A1 Extraction or recovery of metal values |
| 04/29/1993 | CA2119240A1 Extraction or recovery of metal values |
| 04/21/1993 | EP0399035B1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials |
| 03/09/1993 | CA1314149C Methods of recovering arsenic values from waste |
| 10/14/1992 | EP0508542A2 Process for treating ore having recoverable metal values including arsenic containing components |
| 08/25/1992 | US5141753 Method for utilizing the copper-arsenic precipitate created in the electroytic refining of copper in the production of anti-rot agents for wood |