| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 07/07/2004 | EP0948655B1 Recovery of nickel from bioleach solution |
| 07/07/2004 | CN1511195A Process for selectively removing molybdenum from liquid mixtures containing it together with vanadium |
| 07/07/2004 | CN1510151A Cobalt slag containing treating method |
| 07/07/2004 | CN1510150A Method for extracting rare earth oxide with membrane separation technology |
| 07/07/2004 | CN1156589C Dearsenfifying method for Cu-Zn-Co material |
| 07/06/2004 | CA2202063C Method of recovering gold |
| 07/01/2004 | WO2004024656A3 Process for reducing chromium in nonvolatile residue resulting from air oxidation of cyclohexane |
| 07/01/2004 | US20040126291 Low viscosity copper solvent extraction reagent formulations |
| 07/01/2004 | US20040124141 Cyclic method for separating chemcial elements present in an aqueous solution |
| 06/30/2004 | EP1433860A1 Process for regenerating thiosulphate from a spent thiosulphate gold leachant |
| 06/30/2004 | EP1432836A1 Metal ion recovery |
| 06/30/2004 | CN1509341A Method for bacterially assisted heap leaching of chalcopyrite |
| 06/29/2004 | US6755891 Process for the treatment or removal of impurities in a hydrometallurgical extraction process |
| 06/24/2004 | WO2004053174A1 Method and system for extracting metal from glass waste |
| 06/24/2004 | US20040118249 Process for separation/recovery of platinum group metals |
| 06/24/2004 | US20040118248 Dissolving; alkaline treatment in brine solutions, then acidification |
| 06/23/2004 | CN1507497A Extraction process |
| 06/23/2004 | CN1506474A Phosphorus-eliminating purification process of vanadium-containing chamotte leachate |
| 06/22/2004 | CA2306015C A method of purifying acid leaching solution |
| 06/17/2004 | WO2004050929A1 Method for reducing emissions |
| 06/17/2004 | WO2004050927A1 Method for separating platinum group element |
| 06/17/2004 | WO2004050926A1 A process for the recovery of adsorbed palladium from spent silica |
| 06/17/2004 | WO2004050660A1 Novel heteroatom containing tetracyclic derivatives as selective estrogen receptor modulators |
| 06/17/2004 | US20040115123 Process for producing nanometer grade powders |
| 06/17/2004 | US20040115108 thiosulfate lixiviants and molecular oxygen through the heap to form a pregnant leach solution of dissolved precious metals, wherein the molecular oxygen is at a pressure greater than its ambient atmospheric pressure before introduction to the heap |
| 06/17/2004 | US20040115107 Purification of platinum group anions; using reagents having precisely spaced nitrogen complexing groups |
| 06/17/2004 | US20040113333 Hydrometallurgical processing system with hydrostatic pressure assisted autoclaving |
| 06/17/2004 | US20040112834 Mineral ore slurry viscosity modification method |
| 06/17/2004 | CA2506582A1 Method for reducing emissions |
| 06/17/2004 | CA2505857A1 Novel heteroatom containing tetracyclic derivatives as selective estrogen receptor modulators |
| 06/16/2004 | EP1428798A1 Method of treating heavy-metal-containing wastewater with sulfidizing agent and treatment apparatus |
| 06/16/2004 | CN1153850C Process for preparing high-purity gold by electrolyzing extracted gold-contained organic phase |
| 06/16/2004 | CN1153836C Art for preparing high purity yttrium by liquid-liquid extraction separation |
| 06/10/2004 | WO2004048625A1 Method for eliminating mercury from solutions contaminated by the same |
| 06/10/2004 | WO2004048624A1 Method for removing mercury from solutions which are contaminated with mercury |
| 06/10/2004 | US20040108633 Method and system for extracting metal from glass waste |
| 06/10/2004 | US20040108632 Method and system for extracting metal from glass waste |
| 06/09/2004 | EP1425428A2 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 06/09/2004 | EP1034136B1 Treatment of a solution containing iron salts |
| 06/09/2004 | EP1012350B1 Method for reprocessing materials containing precious metals by means of chromatographic separation and fractionation |
| 06/09/2004 | DE10255240A1 Verfahren zur Entfernung von Quecksilber aus mit Quecksilber verunreinigten Lösungen A process for removal of mercury from solutions contaminated with mercury |
| 06/09/2004 | DE10255239A1 Verfahren zur Entfernung von Quecksilber aus mit Quecksilber verunreinigten Lösungen A process for removal of mercury from solutions contaminated with mercury |
| 06/09/2004 | CN1502710A Deep purifying method for manganese sulfate solution |
| 06/09/2004 | CN1502709A Technology for treating calcined pyrite by chemical submersion washing method |
| 06/08/2004 | US6746512 Hydrometallurgical extraction of copper and other valuable metals |
| 06/03/2004 | WO2004046036A2 Method for thiosulfate leaching of precious metal-containing materials |
| 06/03/2004 | US20040105799 which is used as an adsorbent in column chromatography or as a catalyst support; burning spent silica gel with palladium complex adsorbed on its surface, washing the residue with a mineral acid, drying , precipitating |
| 06/03/2004 | US20040103756 comprise circuit configuration for a plant with coutercurrent extraction stages and stripping section |
| 06/03/2004 | US20040103512 Method and apparatus for reclamation of precious metals from circuit board scrap |
| 06/03/2004 | CA2716442A1 Method for thiosulfate leaching of precious metal-containing materials |
| 06/02/2004 | EP1424403A1 Procedure to agglutinate copper concentrates in a gravel heap, to be later leached on a non-flooded bed, to which an agglutinating solution containing calcium chloride, and a second solution containting sulfate ion, are added |
| 06/02/2004 | CN1500892A Refined method for copper materials containing copper sulphide minerals |
| 06/02/2004 | CN1152158C Solvent extraction process for purifying copper electrolyte |
| 06/02/2004 | CA2450525A1 Process for leaching acid-consuming ores |
| 06/01/2004 | US6743276 Method and apparatus for solar heating a mining leach solution |
| 06/01/2004 | CA2301097C Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide or laterite ores |
| 06/01/2004 | CA2301096C Chloride assisted hydrometallurgical extraction of copper from sulphide ore materials |
| 05/27/2004 | WO2004044578A1 Separating vessel |
| 05/27/2004 | WO2004044253A2 Method of leaching beryllium from beryllium-containing ores using fluosilicic acid |
| 05/27/2004 | WO2004043862A1 Method of leaching beryllium values using hydrofluoric acid |
| 05/27/2004 | US20040102658 For recovering rhodium catalysts from homogeneously catalysed hydroformylation reactions of olefins with carbon monoxide |
| 05/26/2004 | EP1421162A1 Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| 05/25/2004 | US6740290 Converting impurity divalent copper ions in aqueous solution of cobalt chloride to monovalent copper ions using hydrochloric acid, separating monovalent copper ions using ion exchange resins |
| 05/25/2004 | US6739454 Reaction of the methyl or ethyl ester of a fatty acid having 6 to 22 carbon atoms with a hydroxylamine salt and an alkali metal hydroxide in the presence of water, either a hydrocarbon oil or a fatty oil |
| 05/21/2004 | WO2004042094A1 Reducing cyanide consumption in gold recovery from finely ground sulphide ores and concentrates |
| 05/19/2004 | DE10249520A1 Dissolving iron out of an iron-based collector alloy, especially in mobilization of noble metals from spent catalysts, involves addition of ferric chloride and chlorine |
| 05/18/2004 | US6737030 Extracting an aqueous feed mix comprising zirconium oxychloride and hafnium oxychloride and a thiocyanate salt with thiocyanate-containing organic solvent to produce a aqueous raffinate stream and organic raffinate stream |
| 05/18/2004 | US6736877 Heap bioleaching process for the extraction of zinc |
| 05/18/2004 | CA2412352A1 Method for thiosulfate leaching of precious metal-containing materials |
| 05/15/2004 | CA2850217A1 Method for thiosulfate leaching of precious metal-containing materials |
| 05/15/2004 | CA2850216A1 Method for thiosulfate leaching of precious metal-containing materials |
| 05/15/2004 | CA2691607A1 Method for thiosulfate leaching of precious metal-containing materials |
| 05/13/2004 | WO2004040027A1 A process for simultaneous recovery of chromium and iron from chromite ore processing residue |
| 05/13/2004 | WO2002090605A8 Acid digestion process for treating alumina-bearing ores to recover metal values therefrom |
| 05/13/2004 | US20040091984 Method for the bacterially assisted heap leaching of chalcopyrite |
| 05/13/2004 | US20040089103 Method for the removal of calcium from a zinc process sulfate solution |
| 05/12/2004 | EP1204774B1 Composition and process for the solvent extraction of metals using aldoxime or ketoxime extractants |
| 05/12/2004 | CN1496415A A method for precipitation of silica in connection with zinc ore leaching |
| 05/12/2004 | CN1496414A A method for removal of calcium from zinc frocess sulfate solution |
| 05/12/2004 | CN1149294C Method of extracting metal gallium forjm smelting smoke dust of corundum arc funace |
| 05/11/2004 | US6733688 Composition and process for the solvent extraction of metals using aldoxime or ketoxime extractants |
| 05/11/2004 | US6733653 Electrowinning cell incorporating metal ion filtration apparatus |
| 05/11/2004 | US6733567 Bioleaching, oxidation |
| 05/11/2004 | US6733564 Leaching with sulphuric acid in presence of small amount of an additive |
| 05/06/2004 | WO2004037453A1 Method for clarifying soil |
| 05/06/2004 | US20040086450 Environmentally friendly process for producing sulfuric acid than either direct burning of the elemental sulfur or base metal smelting |
| 05/06/2004 | US20040086438 Process for simultaneous recovery of chromium and iron from Chromite Ore Processing Residue |
| 05/06/2004 | EP1112389A4 Process for recovery of gold and/or silver |
| 05/06/2004 | CA2503431A1 Method for clarifying soil |
| 05/05/2004 | CN1494513A Preparation method of nano grade powder |
| 05/05/2004 | CN1493706A Method for separating/ recovering platinum family metal |
| 05/05/2004 | CN1493705A Preparation method of primary extraction copper, nickel to produce its salt product and its formulation |
| 05/05/2004 | CN1493704A New technology of leaching copper sulfide ore using copper ore acidic ore pit water containing bacteria |
| 05/05/2004 | CN1493385A Equipment for draining two separable solutions from subsider |
| 05/05/2004 | CN1493384A Method and equipment for regulating interface of two solutions and making it separation |
| 05/05/2004 | CN1148461C Process for extracting nickel from nickel sulfide material with low copper content |
| 05/04/2004 | US6730279 Forming aqueous slurry of low grade molybdenite concentrates; oxidizing; filtering discharge; leaching solid filter cake with an alkaline solution; filtering second discharge; recovering the molybdenum value; crystallization |
| 04/29/2004 | WO2004035843A1 Production of titania |
| 04/29/2004 | WO2004035842A1 Production of titania |
| 04/29/2004 | WO2004035841A1 Production of titania |