| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 09/27/2001 | WO2001032943A3 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 09/26/2001 | EP1135537A1 Treating niobium and/or tantalum containing raw materials |
| 09/26/2001 | CN1071716C Process for preparing pure alkali metal tungstate and/or ammonium tungstate solutions |
| 09/25/2001 | US6294362 Rapid ferrous sulfate biooxidation |
| 09/20/2001 | DE10009956A1 Removal of nitrate from acidic, aqueous, particularly rare earth metal, solutions comprises adding formic acid and urea |
| 09/19/2001 | EP1133576A1 Recovering metals from soil |
| 09/19/2001 | EP1133501A1 Calixarene derivatives |
| 09/18/2001 | US6291705 Combined supported liquid membrane/strip dispersion process for the removal and recovery of metals |
| 09/18/2001 | US6290749 Dissolving crude silver mixture in nitric acid to form silver nitrate, adding reducing agent to reduce silver nitrate and precipitate silver/contaminant matrix and form purified silver nitrate, separating, adding reducing agent, precipitating |
| 09/18/2001 | US6290747 Conversion of impure silver halide to ultra-pure silver metal |
| 09/13/2001 | WO2001066811A1 Methods for reducing cyanide consumption in precious metals extraction from sulfur bearing ores |
| 09/13/2001 | WO2001066808A2 Process for organic acid bioleaching of nickel ore |
| 09/13/2001 | US20010021361 Heating; adding chlorate; forming ruthenium tetraoxide |
| 09/13/2001 | DE10005084C1 Recovery of rhodium from rhodium complexes, for reuse as a hydroformylation catalyst, comprises extraction with a phosphate or phosphonate, oxidization and treatment with an arylphosphine. |
| 09/12/2001 | EP0991785B1 A method and a device for recovering metals comprising dissolving , concentrating and electrowinning means with rotatable cathode |
| 09/12/2001 | CN1312867A Method for removing sulfur in nickel leaching process |
| 09/12/2001 | CN1312393A Conversion of non-pure silver halide into super-pure metal silver |
| 09/12/2001 | CN1312392A Arsenic smoke dust treating method |
| 09/12/2001 | CN1312390A Metal gallium producing process and apparatus utilizing low-silicon iron |
| 09/12/2001 | CN1070719C Liquid medium extraction purification method |
| 09/05/2001 | EP1129226A1 Polymers with ligands bound thereto for metal extractions in liquid carbon dioxide |
| 09/05/2001 | EP1129225A1 Sulfatisation process for metal extraction from sulfide ores |
| 09/05/2001 | EP1090153A4 Tantalum sputtering target and method of manufacture |
| 09/05/2001 | CN1311340A Method for producing manganese carbonate from manganese sulfate in waste manganese mud |
| 09/04/2001 | US6284530 Stacked bioreactor cells comprising a perforated inner cell surrounded by an outer cell wall loaded with packing material coated with substrates such as: acidophilic microbe support substrate or inoculum-supporting substrate |
| 08/30/2001 | WO2001062993A1 Process and apparatus for recovery of cyanide and metals |
| 08/30/2001 | WO2001062991A1 Method for upgrading steel plant dust |
| 08/30/2001 | WO2001062990A1 Method and bioreactor for enzymatic metal cation reduction in solution |
| 08/30/2001 | WO2001062989A1 Method for the recovery of nickel and/or cobalt |
| 08/30/2001 | CA2400806A1 Process and apparatus for recovery of cyanide and metals |
| 08/29/2001 | CN1310242A Zn-Co sludge treating method |
| 08/29/2001 | CN1310240A Method of utilizing beta-naphthol for eliminating Co in main and subsidiary zinc electrolyzing systems |
| 08/29/2001 | CN1310239A Microbe leaching-out method of valuable metals from deep-sea polymetal nodule |
| 08/29/2001 | CN1310238A Metal manganese electrolyzing techn with roasted ore to replace natural manganese dioxide ore |
| 08/28/2001 | US6280501 Base metal recovery |
| 08/28/2001 | US6280500 Methods for removing pollutants from contaminated soil materials with a fern plant |
| 08/28/2001 | CA2197285C Method of platinum recovery |
| 08/23/2001 | WO2001061061A1 Method and a plant for removing mercury contamination from metal with a reducing liquid |
| 08/23/2001 | WO2001061058A1 Process for recovery of metals from metal-containing ores |
| 08/23/2001 | CA2400673A1 Process for recovery of metals from metal-containing ores |
| 08/22/2001 | EP1125647A1 Method and device for decomposing circuit member by water in supercritical fluid state |
| 08/22/2001 | EP1124998A1 Method for the production of a high-purity concentrated magnesium chloride solution by acid leaching and neutralization |
| 08/22/2001 | EP0795046B1 Process for making copper metal powder, copper oxides and copper foil |
| 08/21/2001 | US6277341 Process for the rapid leaching of chalcopyrite in the absence of catalysts |
| 08/21/2001 | US6277300 Composition and use of composition for the extraction of metal values |
| 08/21/2001 | US6277290 Reducing the silver ions to silver metal with an organic reducing agent, especially a photographic developer reagent |
| 08/09/2001 | WO2001056932A1 Method for recovering rhodium from reaction products of oxosynthesis |
| 08/09/2001 | US20010012499 Cobalt recovery process |
| 08/08/2001 | EP1122324A1 Method of leaching zinc concentrate with spent electrolyte and added iron(III) residue |
| 08/08/2001 | EP1122323A1 Method for recovering platinum from platinum-containing coatings on gas turbine engine components |
| 08/08/2001 | EP1019551B1 Separation of platinum group metals |
| 08/08/2001 | CN1307140A NaOH decomposition method of scheelite and mixed wolframite and scheelite ore |
| 08/08/2001 | CN1306941A Method for extracting germanium dioxide from raw coal |
| 08/07/2001 | US6270737 Complex organoboron compound and a substituted or unsubstituted polyethylene glycol in diluent mixture of a tetrafluoropropyl diether of ethylene or diethylene glycol or formal. |
| 08/02/2001 | WO2001055463A1 Carbonyl process for recovery of purified cobalt |
| 08/02/2001 | WO2001055462A1 Process for refining silver bullion with gold separation |
| 07/31/2001 | US6267936 Method for effecting solvent extraction of metal ions using hydrocarbon soluble aminomethylene phosphonic acid compounds |
| 07/31/2001 | US6267900 For conducting the separated solutions out of the space where the separation takes place. |
| 07/26/2001 | WO2001004097A3 Cyclic delocalized cations connected by spacer groups |
| 07/26/2001 | DE10002381A1 Purification and/or treatment of suspensions of precious metals and/or rare earth elements comprises concentrating suspension using membrane filter, washing concentrated suspension, and removing filtrate using membrane filter |
| 07/25/2001 | EP1119014A1 Image display, method for disassembling the same, and method for recovering part |
| 07/25/2001 | EP1118683A1 Membrane filter process and apparatus for the purification and/or treatment of suspensions of precious metal compounds |
| 07/25/2001 | CN1305537A Process to recover molybdenum and vanadium metal from spent catalyst by alkaline leaching |
| 07/25/2001 | CN1305015A Process for pre-treating metallurgical ore concentrate difficult to separate |
| 07/25/2001 | CA2296964A1 Cobalt recovery process |
| 07/24/2001 | US6264909 Nitric acid production and recycle |
| 07/24/2001 | US6264720 Extracting metal from substrate by contacting with aqueous treatment solution containing (s,s)-ethylene diamine disuccinic acid and (s,s)-di-imine butane dioic acid acting as chelating agent to form extract solution; separating |
| 07/18/2001 | EP1115891A1 Process for extracting and recovering copper |
| 07/17/2001 | US6261712 Method of reclaiming cathodic active material of lithium ion secondary battery |
| 07/17/2001 | US6261527 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 07/17/2001 | US6261526 Nickel recovery process and compositions for use therein |
| 07/17/2001 | US6261341 Copper leach process aids |
| 07/12/2001 | WO2001049389A1 Method and apparatus for metal removal by ion exchange |
| 07/12/2001 | US20010007646 Leaching ore with aqueous solution of hydrogen halide; separating solids from leachate; subjecting leachate to extraction with immiscible organic phase that selectively removes iron values; |
| 07/11/2001 | EP1114873A1 Biological method of dezincifying galvanised scrap metal |
| 07/11/2001 | EP1114796A1 Process for the winning of osmium and ruthenium from precious metal concentrates |
| 07/11/2001 | EP1114795A1 Process for the separation of ruthenium from precious metal solutions |
| 07/11/2001 | CN1303444A Mineral collector compositions of fatty hydroxamic acid in admixture with oil and process of making same |
| 07/10/2001 | US6258333 Extracting reagent comprising complex organoboron compounds, substituted polyethylene glycols, and neutral organophosphorus compounds in diluent to recover cesium, strontium, rare earths and actinides |
| 07/10/2001 | US6258245 Adding antifoam formulation to acidic leach solution prior to agglomeration of mineral ore to inhibit formation of aerosol mist |
| 07/05/2001 | WO2001048255A1 Method to control manganese in zinc leach circuits |
| 07/05/2001 | WO2001048252A1 Solvent extraction of impurity metals from a valuable metal sulphate solution |
| 07/05/2001 | US20010006612 Concentrate, by treating with nitric acid, then heating the suspension, collecting osmium tetroxide in a hydroxide absorption solution, and alkalinizing the remaining suspension, then finally oxidative extraction of ruthenium |
| 07/05/2001 | CA2395457A1 Solvent extraction of impurity metals from a valuable metal sulphate solution |
| 07/04/2001 | EP1112389A1 Process for recovery of gold and/or silver |
| 07/04/2001 | CN1301874A Preparation of super pure metal silver |
| 07/04/2001 | CN1068063C Recovery method of metal values from solids by digestion in sulfuric acid medium including reductant |
| 07/04/2001 | CN1068061C Recovery method of metal values |
| 07/03/2001 | USRE37251 Pressure oxidation of an ore or concentrate in the presence of oxygen and an acidic solution containing halogen ions and a source of bisulfate or sulfate ions to extract non-cuprous metals |
| 07/03/2001 | US6255510 Production of aromatic carboxylic acids and recovery of Co/Mn catalyst from ash |
| 06/27/2001 | EP0695377B1 Process for making copper metal powder, copper oxides and copper foil |
| 06/26/2001 | US6251163 Method for recovering gold from refractory carbonaceous ores |
| 06/26/2001 | CA2192084C Hydrometallurgical treatment for the purification of waelz oxides through lixiviation with sodium carbonate |
| 06/21/2001 | WO2001044524A1 Sulphidisation of sulphide ores for hydrometallurgical extraction of copper and other metals |
| 06/21/2001 | WO2001044523A1 Process for recovering silver from photographic solutions |
| 06/21/2001 | WO2001044521A1 A process for the recovery of copper from aqueous solutions containing iodinated organic compounds |
| 06/21/2001 | WO2001044520A1 Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 06/21/2001 | WO2001044519A1 A bacterially assisted heap leach |
| 06/21/2001 | WO2001044175A1 Calixarenes |
| 06/21/2001 | WO2000065607A8 Deactivation of metal liquid coolants used in nuclear reactor systems |