| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 11/17/2004 | EP1476402A2 Processes for treating iron-containing waste streams |
| 11/17/2004 | CN1176231C Integral equipment and process for gold-bearing liquor adsorption, desorption and electrolysis |
| 11/17/2004 | CN1176024C Process for comprehensive utilization of waste acid containing titanium oxide |
| 11/16/2004 | US6818191 Autoclave control mechanisms for pressure oxidation of molybdenite |
| 11/16/2004 | US6818135 For recovering metals from aqueous waste solutions |
| 11/16/2004 | CA2548225A1 A process for the recovery of value metals from material containing base metal oxides |
| 11/16/2004 | CA2078048C Acid leaching of copper ore heap with fluoroaliphatic surfactant |
| 11/11/2004 | WO2004096400A2 Interlaced series parallel configuration for metal solvent extraction plants |
| 11/11/2004 | WO2004081245A8 Method for the fine refinement of gold |
| 11/11/2004 | WO2004081244A8 Method for the refinement of gold |
| 11/11/2004 | WO2004072636A9 Measuring rate of change of oxygen concentration and intrinsic oxidation rate in a pile of material |
| 11/10/2004 | EP1129225B1 Sulfatisation process for metal extraction from sulfide ores |
| 11/10/2004 | CN1544665A Biological oxidation and thiourea resin slurry method gold extraction technology for difficultly leachable gold concentrate |
| 11/10/2004 | CN1544664A Technology for preparing cell-level high purified nickel sulfate by the selective leach of water quenching high grade nickel and sulfuric acid |
| 11/10/2004 | CN1544663A Method for preparing copper sulfate using copper concentrate |
| 11/10/2004 | CN1544337A Nanometer bismuth oxide preparation process |
| 11/09/2004 | US6814867 While eliminating the step of reducing hexavalent chromium to trivalent chromium |
| 11/04/2004 | WO2004094677A1 Method for handling waste material generated in a metallurgical process |
| 11/04/2004 | WO2004094676A1 Composition and process for the solvent extraction of metals using aldoxime or ketoxime extractants |
| 11/04/2004 | CA2522087A1 Method for handling waste material generated in a metallurgical process |
| 11/03/2004 | EP1408127B1 Method for recovering germanium and other metals from fly ash generated in an integrated gasification combined cycle-type (igcc) thermal station |
| 11/03/2004 | CN1542147A Nano-filtration method for separating magnesium and enriching lithium from salt lake brine |
| 11/03/2004 | CN1542146A Immersion dressing process for clay type gold mine |
| 11/02/2004 | CA2307957C A method for total precipitation of valuable metals from an acid leaching solution |
| 11/02/2004 | CA2154560C Hydrometallurgical recovery of metals from complex ores |
| 11/02/2004 | CA2132334C Recovery of precious metal |
| 10/28/2004 | WO2004092426A1 A solvent extraction process |
| 10/28/2004 | WO2004092425A1 Method for processing sulfide minerals and concentrates |
| 10/28/2004 | WO2004079840A3 Three-dimensional flow-through electrode and electrochemical cell |
| 10/28/2004 | US20040213717 Process for separating and recovering valuable metals |
| 10/28/2004 | US20040213716 Tantalum Concentrates Dissolution and Purification Method |
| 10/28/2004 | US20040213715 Selective recovery of precious metal(s) |
| 10/28/2004 | DE10313887A1 Verfahren zum selektiven Gewinnen von Gold aus goldhaltigen Materialien A method for selectively recovering gold from gold-bearing materials |
| 10/27/2004 | EP1234062B1 Recovery of metals from ore by bioleaching with sulfur addition |
| 10/27/2004 | CN1540005A Method for treating materiel of containing arsenic |
| 10/27/2004 | CN1173050C Low-temperature roasting and decomposing process of rare earth heading concentrated sucfuric acid |
| 10/26/2004 | CA2167729C Process for the extraction of zinc from sulphide concentrates |
| 10/26/2004 | CA2147554C Process for treating solutions containing sulfate and metal ions |
| 10/21/2004 | WO2004090179A1 Method of recovering vanadium oxide flake from diesel oil fly-ash or orimulsion fly-ash |
| 10/21/2004 | WO2004090178A1 Recovery of platinum group metals |
| 10/21/2004 | WO2004090176A1 Reductive ammoniacal leaching of nickel and cobalt bearing materials |
| 10/21/2004 | WO2004076509A3 Phosphorous dendrimers, preparation method thereof and use of same for the extraction of actinides and lanthanides |
| 10/21/2004 | US20040208808 Solvent extraction mixture comprising substituted imidazole or benzimidazole for the purification of groups of base metals |
| 10/21/2004 | US20040208807 A solvent extraction mixture comprising orthohydroxyarylaldoximes and orthohydroxyarylketoximes, and equilibrium modifiers; for extracting a metal from an acidic solution obtained by leaching ores |
| 10/21/2004 | US20040206208 Bacterial oxidation of sulphide ores and concentrates |
| 10/21/2004 | US20040206207 Method for thiosulfate leaching of precious metal-containing materials |
| 10/21/2004 | US20040206206 Methods for detecting and extracting gold |
| 10/21/2004 | CA2521888A1 Reductive ammoniacal leaching of nickel and cobalt bearing materials |
| 10/20/2004 | EP1468122A1 Method for the separation of zinc and a second metal which does not form an anionic complex in the presence of chloride ions |
| 10/20/2004 | EP1194612A4 Electrowinning cell incorporating metal ion filtration apparatus |
| 10/19/2004 | US6805242 Method of reducing phosphate ore losses in a desliming process |
| 10/19/2004 | CA2327949C Process and composition for removing precious metals from activated carbon |
| 10/14/2004 | WO2004087971A1 A process for recovery of high purity uranium from fertilizer grade weak phosphoric acid |
| 10/14/2004 | WO2004087970A1 Method for recovery of nonferrous, rare and precious metals from robust minerals |
| 10/14/2004 | US20040202607 Recover and recycle rhodium from spent partial oxidation catalysts |
| 10/14/2004 | US20040202595 addition of sodium hydroxide (to adjust the pH), reacting in another tank into which sodium hydroxide and air are added while the admixture is exposed to an ultraviolet beam circuit; photooxidation; magnetic culling to separate ferric oxide |
| 10/14/2004 | US20040200782 Separating selective metals from a metal mixture, first by dissolving in acidic halide solution, complexing to from an organo-metallic complex, separating with an aqueous acid solution, metal deposition |
| 10/14/2004 | US20040200730 Hydrometallurgical copper recovery process |
| 10/13/2004 | EP1137820B1 High purity tantalum and products containing the same like sputter targets |
| 10/13/2004 | CN1536096A Reverse leaching impurity-removing rare earth concentrate decomposition method |
| 10/13/2004 | CN1170948C Process for preparing red copper powder from crude copper ore |
| 10/12/2004 | US6802888 High temperature heap bioleaching process |
| 10/12/2004 | CA2348483C Recovering metals from soil |
| 10/07/2004 | WO2004085687A1 Method for selectively extracting gold from gold-bearing materials |
| 10/07/2004 | WO2004063227A9 Solvent extraction landfill system and method |
| 10/07/2004 | US20040197812 Contaminant removal by ferns via foliar-application and excised/ground fronds |
| 10/07/2004 | US20040195183 Forming easy to filter precipitates of metal hydroxide and gypsum; using multistage neutralizations and recirculation to produce separate crystals; suitable for neutralization of pickling waste from steel refining |
| 10/07/2004 | US20040194579 Reducing waste loss in hydrometallurgical processes using resin absorption |
| 10/06/2004 | EP1366218B1 Electrorefining process for separating metals |
| 10/06/2004 | EP1303640B1 Processing elemental sulfur-bearing materials using high temperature pressure leaching for sulfuric acid production and metal recovery |
| 10/06/2004 | CN1535321A Method for removal of metal from aqueous solution using lime precipitation |
| 10/06/2004 | CN1535311A Adaptation of bacteria for use in leaching |
| 10/06/2004 | CN1170008C Method for removing bismuth and antiomny from silver electrolyte |
| 10/06/2004 | CN1169978C Use of catalyst for bacterial leaching of soluble Sn salt usable as low-grade chalcopyrite-type copper sulfide ore |
| 10/06/2004 | CN1169977C Process for extracting Zn from Zn-containing sulfide ore |
| 10/06/2004 | CN1169943C Intermediate thermophilic acidophilic thiobacillu strin and its application |
| 10/05/2004 | US6800260 Processes for treating iron-containing waste streams |
| 10/05/2004 | US6800259 Using a copper compound; reduction |
| 10/05/2004 | US6800111 Concentrating the catalytic metal colloid on a filter; removing the catalytic metal of the catalytic metal colloid from the filter with an oxidizer; collecting the catalytic metal |
| 09/30/2004 | WO2004083468A1 Method for preventing oxidation of sulfide minerals in sulfide ore |
| 09/30/2004 | WO2004083118A1 Process for removing metal impurities from wet process phosphoric acid and compositions thereof |
| 09/30/2004 | WO2004082798A1 Method and equipment for liquid-liquid extraction |
| 09/30/2004 | WO2004082797A1 Method and equipment for liquid-liquid extraction |
| 09/30/2004 | US20040188896 Flotation device |
| 09/30/2004 | US20040187643 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 09/30/2004 | DE10310699A1 Verfahren zur Feinstraffination von Gold Method for Feinstraffination of gold |
| 09/30/2004 | DE10310641A1 Verfahren zur Raffination von Gold Method for refining gold |
| 09/30/2004 | DE102004013531A1 Verfahren zur Wiederaufbereitung von Altbatterien Method for recycling of waste batteries |
| 09/29/2004 | CN1532297A Method for wet zinc refining without iron slag |
| 09/29/2004 | CN1168838C Technology for purifying and remving iron by cupric sulfate solution catalyzing air oxidation method |
| 09/28/2004 | US6797033 Method for recovering catalytic metals |
| 09/28/2004 | CA2406400C A method for isolating and purifying 90y from 90strontium in multi-curiequantities |
| 09/23/2004 | WO2004081245A1 Method for the fine refinement of gold |
| 09/23/2004 | WO2004081244A1 Method for the refinement of gold |
| 09/23/2004 | WO2004081242A1 Recovery of metals from industrial dusts |
| 09/23/2004 | WO2004081241A1 Improved heap leach |
| 09/23/2004 | WO2004080599A1 Method for controlling oxygen when separating minerals from a slurry |
| 09/22/2004 | EP1458897A1 Chromium removal from leach liquors produced during high pressure acid leaching of lateritic ores |
| 09/22/2004 | CN2642791Y Device for tailing leaching |
| 09/22/2004 | CN1531508A Autoclave control method for pressure oxidation of molybdenite |