| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 03/19/1997 | EP0701630A4 Process for removing, separating, and concentrating metals |
| 03/18/1997 | US5612431 Leaching of precious metal ore with fluoroaliphatic surfactant |
| 03/18/1997 | US5611839 Method for rendering refractory sulfide ores more susceptible to biooxidation |
| 03/13/1997 | WO1997009453A1 Copper recovery process |
| 03/13/1997 | CA2230536A1 Copper recovery process |
| 03/12/1997 | CN1034231C Prodn. of zinc by complex compound electrolysis |
| 03/12/1997 | CN1034228C Method for iron removal extraction from nonferrous metal iron-rich organic phase |
| 03/06/1997 | WO1997008349A1 Extraction of valuable metals from sulphide minerals |
| 03/05/1997 | EP0710297A4 Method of extracting fluorine from minerals or mineral species |
| 03/05/1997 | CN1144541A Hydrometallurgical extraction process |
| 03/04/1997 | US5607619 Leaching gold, silver, platinum and palladium |
| 03/04/1997 | US5607591 From effluents of irradiated fuel reprocessing plants |
| 02/27/1997 | WO1997007250A1 Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations |
| 02/27/1997 | WO1997007249A1 Recovery of elements involving a chemical processing step |
| 02/27/1997 | WO1997007248A1 Method for recovering nickel hydrometallurgically from two different nickel mattes |
| 02/27/1997 | CA2229599A1 Recovery of elements involving a chemical processing step |
| 02/27/1997 | CA2227581A1 Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations |
| 02/26/1997 | CN1143683A Char filtering method and impact type char filter for recovering gold and silver |
| 02/26/1997 | CN1034131C Copper extracting method from mixed copper mine and cupric oxide mine |
| 02/26/1997 | CN1034130C Method of recoverying gold, solver and orpiment from refractory gold ore containing arsenic |
| 02/25/1997 | US5606724 Extracting metals directly from metal oxides |
| 02/25/1997 | US5605668 Using cobalt oxide hydroxide intermediate |
| 02/25/1997 | US5605563 Ion exchanging, precipitation, separation, circulation |
| 02/20/1997 | WO1997006283A1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 02/20/1997 | WO1997006282A1 Electrochemical processing method for catalyst substrates containing noble metals for the recovery thereof |
| 02/20/1997 | WO1997006215A1 Method for preparing inorganic pigments, resulting inorganic pigments, and apparatus therefor |
| 02/20/1997 | WO1997005924A1 Heterogeneous waste processing |
| 02/20/1997 | CA2229058A1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 02/20/1997 | CA2228562A1 A method of preparing inorganic pigments, inorganic pigments obtained thereby, and an installation for implementing such a method |
| 02/19/1997 | EP0758265A1 Reactor trays for a vertical staged polycondensation reactor |
| 02/19/1997 | CN1143394A Leaching of titaniferous materials |
| 02/18/1997 | US5603890 Silver reduction assembly including a hollow coil of screen material formed of a metal that is above silver in electromotive force series; for precipitating silver as metal from photographic solutions |
| 02/18/1997 | US5603750 Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations |
| 02/13/1997 | WO1997005294A1 Method of purifying gold |
| 02/13/1997 | WO1997005292A1 Process for the removal of arsenic from bacterial leach liquors and slurries |
| 02/13/1997 | WO1996041029A3 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 02/13/1997 | CA2237171A1 Method of purifying gold |
| 02/12/1997 | CN1142542A Process and apparatus for preparing chlorinated rare-earth from fine rare-earth minerals by alkali water heating process |
| 02/11/1997 | US5603074 Preparation and use of tetra-alkyl cobalt dicarbollide for extraction of cesium and strontium into hydrocarbon solvents |
| 02/11/1997 | US5602071 Comprising peat moss and a poly(carboxylic acid) binder that has been crosslinked and neutralized with an alkali metal; sorption |
| 02/06/1997 | WO1997004141A1 Zirconium and hafnium separation in chloride solutions using continuous ion exchange chromatography |
| 02/06/1997 | WO1997004140A1 Hydrometallurical process for the recovery of copper from oxidized metal materials |
| 02/06/1997 | WO1997004139A1 METHOD FOR RECOVERING NICKEL FROM HIGH MAGNESIUM-CONTAINING Ni-Fe-Mg LATERITIC ORE |
| 02/06/1997 | WO1997003754A1 Process for recovering copper from copper-containing material |
| 02/06/1997 | WO1997003743A1 Zirconium and hafnium separation in sulfate solutions using continuous ion exchange chromatography |
| 02/05/1997 | CN1141956A Method for production of zinc from material containing zinc |
| 02/04/1997 | US5599372 Process for removing metal contaminants from soils |
| 01/30/1997 | WO1997002906A1 Process for the recovery of heavy metals such as lead from metal contaminated soil |
| 01/30/1997 | CA2223052A1 Process for the recovery of heavy metals such as lead from metal contaminated soil |
| 01/29/1997 | EP0756013A1 Interseparation of platinum group metals |
| 01/29/1997 | EP0755994A2 Method of eliminating mercury from liquid hydrocarbons |
| 01/29/1997 | EP0755730A1 Method for decontaminating soils and waste containing iron oxides and heavy metals |
| 01/29/1997 | EP0755459A1 Leaching of a titaniferous material |
| 01/29/1997 | CN2246155Y Electrical chemical ore soaking machine for wet metallurgy |
| 01/28/1997 | US5597729 Method for the removal and recovery of mercury |
| 01/28/1997 | CA2182154A1 Method for eliminating mercury from liquid hydrocarbons |
| 01/26/1997 | CA2154608A1 Method of purifying gold |
| 01/22/1997 | EP0670840B1 Bis-crown calix[4]arenes, method for preparing same and use thereof for selectively recovering cesium and actinides |
| 01/22/1997 | CN1140764A Process for producing low-zinc and low-magnesium mixed rare-earth metal |
| 01/21/1997 | US5595642 Pressure leaching of nickel and cobalt sulphides with chlorine under controlled redox potential conditions |
| 01/16/1997 | WO1997001649A1 Method for selective separation of cadmium from an acidic aqueous solution |
| 01/15/1997 | EP0753078A1 Solvent extraction process |
| 01/15/1997 | EP0739430A4 Process for making copper wire |
| 01/14/1997 | CA1338837C Production of a magnesium product from a magnesite ore |
| 01/09/1997 | WO1997000714A1 Liquid medium extraction purification method |
| 01/08/1997 | EP0752013A1 Hydrometallurgical extraction process |
| 01/08/1997 | CN1139704A Method for extracting copper from ore |
| 01/08/1997 | CN1033761C Hydrometallurgical method of producing metallic lead from materials containing lead oxide and/or metallic lead |
| 01/02/1997 | EP0712445A4 Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| 12/27/1996 | WO1996041902A1 Ammoniacal metal solution recycling process |
| 12/27/1996 | WO1996041668A1 Gas sparging ammonia from organic extractant |
| 12/27/1996 | CA2224322A1 A process for working up ammoniacal metal solutions |
| 12/27/1996 | CA2220452A1 Process for removing and recovering ammonia from organic metal extractant solutions in a liquid-liquid metal extraction process |
| 12/24/1996 | US5587142 Synergistic effect |
| 12/24/1996 | US5587060 Method of removing metal contained in solution |
| 12/24/1996 | US5587001 Process for treating iron-containing sulfidic rocks and ores |
| 12/19/1996 | WO1996041029A2 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 12/19/1996 | WO1996041027A1 Chloride assisted hydrometallurgical extraction of metal |
| 12/19/1996 | WO1996041026A1 Chloride assisted hydrometallurgical extraction of metal |
| 12/19/1996 | WO1996041025A1 Process for extraction of nickel and cobalt from laterite ores |
| 12/19/1996 | DE19521352A1 Verfahren zur Aufarbeitung ammoniakalischer Metallösungen Process for working metal ammoniacal solutions |
| 12/19/1996 | CA2456772A1 Chloride assisted hydrometallurgical extraction of metal |
| 12/18/1996 | CN1138104A Method for production of low-magnesium low-zinc mixed rare metal by using acid-process material |
| 12/17/1996 | US5585079 Dissolving zinc ferrite and zinc oxide in sulfuric acid without dissolving the zinc silicate, reducing silicate residue with coal in furnace to produce iron silicate slag |
| 12/12/1996 | WO1996039702A2 Methods and agents for the extraction of cesium and strontium from nuclear waste |
| 12/12/1996 | WO1996039550A1 Method for recovering copper |
| 12/12/1996 | CA2222418A1 Method for recovering copper |
| 12/11/1996 | CN1137809A Process for making copper wire |
| 12/11/1996 | CN1033522C Ionic speed-controlling shower soaking technology for rare-earth minerla and its equipment |
| 12/11/1996 | CN1033521C Ionic type rare earth ore in-situ lixiviation processing |
| 12/10/1996 | US5582631 Combining with iron-poor material such as exhaust fumes; treating with ammonium chloride leaching solution; separation; roasting |
| 12/05/1996 | WO1996038381A1 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 12/05/1996 | WO1996038380A1 Metal and fluorine values recovery from fluoride salt matrices |
| 12/05/1996 | WO1996038227A1 Water-soluble polymers for recovery of metals from solids |
| 12/05/1996 | WO1996038220A1 Process for recovery of metal ions |
| 12/04/1996 | EP0745439A2 Process for removing heavy metals from soil |
| 12/04/1996 | EP0745438A2 Process for removing heavy metals from soil |
| 12/04/1996 | EP0745006A1 Process for the treatment of contaminated land |
| 12/04/1996 | EP0744982A1 Process for the treatment of contaminated material |
| 12/04/1996 | CN1137067A Process for extracting gold from leaching solution |