| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 01/13/2005 | US20050005737 Method for recovering metal values from concentrates of sulfide minerals |
| 01/12/2005 | EP1496130A1 High purity tantalum for producing sputter targets |
| 01/12/2005 | EP1496063A1 Novel phosphonamides, process for producing the same, and use thereof |
| 01/12/2005 | EP1495149A1 Process for the treatment or removal of impurities in a hydrometallurgical extraction process |
| 01/12/2005 | CN1563442A Technique for separating high purity yttrium oxide through solvent extraction |
| 01/11/2005 | US6841121 Process for producing oxide-dispersion strengthened platinum material |
| 01/05/2005 | EP1280941B1 Method for eliminating nickel ions and lead ions from ferrous salt solutions |
| 01/05/2005 | CN1561401A Chloride melt process for the separation and recovery of zinc |
| 01/05/2005 | CN1560289A Method of dearsenic by parallel circulating continuous electric formation |
| 01/05/2005 | CN1560288A Process of recoverying lithium and manganese from their oxide |
| 01/05/2005 | CN1559664A Preparation of bacteria mineralized nanometer needle iron ore and its application |
| 01/04/2005 | US6837996 Polysulfonamide matrices |
| 01/04/2005 | CA2258607C Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores |
| 12/30/2004 | US20040262232 Precipitating the molybdenum sulfide from a solution containing molybdenum and vanadium by using alkali metal alkyl xanthate while maintaining the pH acidic |
| 12/30/2004 | US20040261579 Interlaced series parallel configuration for metal solvent extraction plants |
| 12/29/2004 | EP1337675B1 Chromatographic method of separating ruthenium from platinum group metals |
| 12/29/2004 | EP1332234B1 Precious metal scavenging from a liquid medium with a functionalised polymer fiber |
| 12/29/2004 | CN2666556Y Micro-impregnation closed preprocessing apparatus for gold ore |
| 12/29/2004 | CN1557978A Production technology for extracting vanadium and molybdenum from spent aluminum base molybdenum catalyzer using wet method |
| 12/29/2004 | CN1182265C Method for reduction of nickel |
| 12/29/2004 | CN1182263C Base metal recovery from tailings drum by bacterial oxidation |
| 12/28/2004 | US6835295 Electroplating; improved efficiency |
| 12/28/2004 | US6835230 Hydrometallurgical zinc production process from sulfides, where ferric ion consumed by leaching is regenerated for reuse by introducing oxygen into the post-leaching solution flowing through feed pipes; shortens the leach time |
| 12/28/2004 | US6835228 Process of recovering valuable metals from waste secondary batteries |
| 12/23/2004 | US20040258590 Method for extracting copper from leach solutions at elevated temperatures |
| 12/22/2004 | EP1488015A1 Process for the recovery of nickel from spent catalyst |
| 12/22/2004 | EP1179367B1 Use of a chelate-forming porous hollow fiber membrane and method for the recovery of germanium oxide with the same |
| 12/22/2004 | CN1556849A Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| 12/22/2004 | CN1556230A Method of leaching copper in copper containing pyrite using bacteria |
| 12/21/2004 | US6833123 Contacting highly water soluble barium compounds with liquid waste containing chromate or other oxy-metal ions to form low water soluble barium/oxy-metal compounds which can be filtered out on precipitation |
| 12/21/2004 | US6833021 Method for treating precious metal bearing minerals |
| 12/21/2004 | US6833020 Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed |
| 12/21/2004 | CA2236149C Metallurgical dust recycle process |
| 12/16/2004 | WO2004108973A1 Solvent extraction composition comprising sulphonic acid with a 4-(alpha branched) acyl-(3h)-pyrazol-3-ones and processes of metal extraction |
| 12/16/2004 | WO2004108245A1 Method and equipment for purifying an extraction solution from aqueous entrainment and impurities |
| 12/16/2004 | US20040253157 Methods for recovering at least one metallic element from ore |
| 12/16/2004 | US20040250655 Precipitation/leaching of copper chloride solution |
| 12/15/2004 | CN1555422A Reduction of zinc oxide from complex sulfide concentrates using chloride processing |
| 12/15/2004 | CN1554785A Chemical bulk stack dipping process for gold-containing tailing ore without pelletizing |
| 12/15/2004 | CN1554784A Process for separating antimoney from gold-antimoney ore using wet metallurgical technology |
| 12/15/2004 | CN1554783A Dipping process for tailing containing gold |
| 12/15/2004 | CN1180100C Method for producing manganese carbonate from manganese sulfate in waste mangaese mud |
| 12/15/2004 | CN1180098C Method for removing iron and thorium impurities in rare earth sulfuric acid double salt |
| 12/09/2004 | WO2004106564A2 Method for recovering at least one metallic element like cesium from ore |
| 12/09/2004 | WO2004106562A1 Anoxic leaching of precious metals with thiosulfate and precious metal oxidants |
| 12/09/2004 | WO2004106560A1 A process for treating dust |
| 12/09/2004 | WO2004106233A2 A process for recovering phosphorus from phosphorous production sludge |
| 12/09/2004 | WO2004029333A3 Method and device for electroextraction of heavy metals from technological solutions and wastewater |
| 12/09/2004 | WO2004022604A3 Solvent extraction process |
| 12/09/2004 | US20040247504 Two-cycle selective countercurrent extraction using bis(2-ethylhexyl) phosphate and tri-n-butyl phosphate with refined kerosene as synergistic extractant system on H2O2 treated H3PO4, and stripping the loaded extract with strong H3PO4 containing metallic iron to lower redox potential |
| 12/08/2004 | EP1484284A1 Purification method for producing high purity niobium compound and/or tantalum compound |
| 12/08/2004 | EP1484283A1 Purification method for producing high purity niobium compound and/or tantalum compound |
| 12/08/2004 | CN1552925A Processing method for industrial waste material |
| 12/08/2004 | CN1552924A Ball grinding metal replacement method |
| 12/08/2004 | CN1552923A Method for enrichment recovering germanium from acid solution |
| 12/08/2004 | CN1552922A Extraction of nickle oxide from serpentine by sulfuric acid leaching out |
| 12/08/2004 | CN1552921A Method for improving quality of iron concentrate |
| 12/08/2004 | CN1552628A Manufacture of high grade artificial rutile from low grade primary greporite |
| 12/08/2004 | CN1179057C Method for upgrading steel plant dust |
| 12/07/2004 | US6827860 Method for eliminating nickel ions and lead ions from ferrous salt solutions |
| 12/07/2004 | US6827856 Using chelating resins for removing copper; displacing absorbed copper by treating resins with hydrochloric acid or sulfuric acid solutions; waste from iodine recovery by copper mineralization of X-ray contrast agent production solutions |
| 12/02/2004 | WO2004104238A2 Method for extracting copper from leach solutions at elevated temperatures |
| 12/02/2004 | WO2004103515A1 Method for clarification of wood having been treated with chemical containing copper, chromium or arsenic |
| 12/02/2004 | US20040241827 Adaptation of bacteria for use in leaching |
| 12/02/2004 | US20040241073 A process for total environmental remediation of a phosphorus contaminated site |
| 12/02/2004 | US20040237721 In situ mining; long term maintainence of active conditions; environmentally friendly |
| 12/02/2004 | US20040237720 Zinc recovery process |
| 12/02/2004 | CA2526184A1 Method for clarification of wood having been treated with chemical containing copper, chromium or arsenic |
| 12/02/2004 | CA2525834A1 Method for extracting copper from leach solutions at elevated temperatures |
| 12/01/2004 | EP1481103A1 Method to reduce hydrosulphide and arsine emissions during wet ore processing |
| 12/01/2004 | EP1268867B1 Method and a plant for removing mercury contamination from metal with a reducing liquid |
| 12/01/2004 | CN1177945C Method for separating platinum palladium iraurita |
| 12/01/2004 | CN1177944C Method of producing tungstic acid by closed type hydrochloric acid decompose tunstite |
| 12/01/2004 | CN1177943C Method for leaching nickel from nickel matte |
| 12/01/2004 | CN1177885C Integral multi-layered ion-exchange composite membranes |
| 11/25/2004 | WO2004101847A1 Method and apparatus for converting metal ion in solution to the metal state |
| 11/25/2004 | WO2004101834A2 Treatment of base metal concentrate by a two-step bioleaching process |
| 11/25/2004 | WO2004101833A1 A process for the recovery of value metals from material containing base metal oxides |
| 11/25/2004 | US20040235141 Extracting metals from low grade sulphide ores using bacterial inoculated nutrient broth; bioremediation and metal extraction |
| 11/25/2004 | US20040232084 Adding a sulfiding agent to the wastewater, while detecting generated hydrogen sulfide gas to maintain a state in which hydrogen sulfide gas is just starting to be generated from the wastewater; the acidity of the wastewater is adjusted to within a range suitable for the metal to be separated |
| 11/25/2004 | CA2526104A1 Treatment of base metal concentrate |
| 11/24/2004 | EP1479654A1 Method of purifying niobium compound and/or tantalum compound |
| 11/24/2004 | CN1549794A Method of treating heavy-metal-containing wastewater with sulfidizing agent and treatment apparatus |
| 11/24/2004 | CN1548580A Hydrogen peroxide soaking process for separating waste zinc containing nickel alloy sheet |
| 11/24/2004 | CN1548564A Weathered chromium residue detoxicating and utilizing techn |
| 11/24/2004 | CN1548563A Wet separation process of waste ZnCuNi alloy |
| 11/24/2004 | CN1177067C Method of oxidating extracting cerium from cerium containing rare earth sulfuric acid solution |
| 11/24/2004 | CN1177066C High calcium tungsten mineral decomposition method by means of normal pressure alkali boiling process |
| 11/23/2004 | CA2288203C Integrated, tank/heap biooxidation process for the lixiviation of sulfide ores |
| 11/23/2004 | CA2282848C Copper and nickel recovery |
| 11/23/2004 | CA2221930C Chloride assisted hydrometallurgical extraction of metal |
| 11/23/2004 | CA2196981C Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 11/23/2004 | CA2170149C Process for the elution of precious metals adsorbed on active carbon |
| 11/23/2004 | CA2137812C Upgrading titaniferous materials |
| 11/18/2004 | WO2004098776A1 Method and apparatus for desorbing material |
| 11/18/2004 | WO2004098775A1 A resin and process for extracting non-ferrous metals |
| 11/18/2004 | US20040228783 leaching ores with lixiviant comprising magnesium chloride and hydrochloric acid |
| 11/18/2004 | US20040226407 Method and apparatus for converting metal ion in solution to the metal state |
| 11/18/2004 | CA2525274A1 Method and apparatus for desorbing material |
| 11/18/2004 | CA2525272A1 A resin and process for extracting non-ferrous metals |