| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 05/03/2000 | EP0891298B1 Method for recovering sodium from alkaline industrial waste |
| 05/02/2000 | CA2138777C Production of metals from minerals |
| 04/27/2000 | WO2000023629A1 Process for bioleaching of copper concentrates |
| 04/26/2000 | CN1051805C Process for preparing industrial beryllium oxide and mixed rare-earth hydroxy compound by using silicon-beryllium-yttium ore |
| 04/25/2000 | US6054105 Process for the solvent extraction of nickel and cobalt values in the presence of magnesium ions from a solution |
| 04/25/2000 | US6053964 Apparatus and method for applying a leaching solution to ore |
| 04/25/2000 | US6053963 Method for treating rotary slag |
| 04/19/2000 | EP0993510A1 Method for phytomining of nickel, cobalt and other metals from soil |
| 04/19/2000 | EP0828689A4 Metal and fluorine values recovery from fluoride salt matrices |
| 04/19/2000 | CN1250815A Full-wet process for pre-treating lead-zinc ore |
| 04/18/2000 | CA2176487C Process for making copper wire |
| 04/18/2000 | CA2001976C Phosphonic acids and their uses in separation |
| 04/13/2000 | WO2000020140A1 Method and device for decomposing circuit member by water in supercritical fluid state |
| 04/12/2000 | EP0992591A2 Grain-oriented electrical steel sheet and production method thereof |
| 04/12/2000 | EP0991786A1 Separating metal ions absorbed on a resin and installation for recycling photographic effluents including an exchanger and an electrolysis vessel |
| 04/12/2000 | EP0991785A2 A method and a device for recovering metals comprising dissolving , concentrating and electrowinning means with rotatable cathode |
| 04/11/2000 | US6048506 Process for the removal of cationic impurities from a cobalt sulphate solution |
| 04/05/2000 | CN1051114C Method for wet pretreating lead anode mud before acid leaching |
| 04/04/2000 | US6045763 Especially etching solutions which contain ammonia, at least one ammonium salt and metal ions in dissolved form and which accumulate in treatment of substrates containing valuable metals, especially copper-containing electronic sub-assemblies |
| 03/30/2000 | WO2000017408A1 Method for the production of a high-purity concentrated magnesium chloride solution by acid leaching and neutralization |
| 03/30/2000 | WO2000017407A1 Method for treating precious metal bearing minerals |
| 03/29/2000 | CN1249009A Processf or the leaching of chalcopyrite |
| 03/28/2000 | US6043022 Apparatus and method for the generation and use of ferric ions |
| 03/28/2000 | US6042775 Silver reclamation system |
| 03/23/2000 | WO2000015857A1 Process for extracting and recovering copper |
| 03/23/2000 | WO2000015856A1 A process for gold extraction |
| 03/23/2000 | CA2344334A1 Process for extracting and recovering copper |
| 03/22/2000 | EP0986432A1 Method and system for selective removal of contamination from gas flows |
| 03/22/2000 | CN2370029Y Integrate pressure desorption electro-deposition device |
| 03/22/2000 | CN1248230A Treatment of solution containing iron salts |
| 03/22/2000 | CN1050522C Method for extracting metal from large solution flows and apparatus for realizing the same |
| 03/21/2000 | US6039790 Leaching using nickel sulfate and sulfuric acid, reducing to nickel metal, leaching an iron bearing solution after acidifying to form nickel sulfate, using formed nickel sulfate solution as leaching solution |
| 03/21/2000 | CA2188792C Reactor trays for a vertical staged polycondensation reactor |
| 03/21/2000 | CA2123382C Processing of compositions containing precious metals and other valuable elements for recovery purposes |
| 03/16/2000 | WO2000014763A1 Image display, method for disassembling the same, and method for recovering part |
| 03/15/2000 | CN1247235A High-purity zinc and its preparing process |
| 03/08/2000 | EP0958390A4 Improvement in the process of recovery of metals |
| 03/02/2000 | WO2000011228A1 Hydrometallurgical extraction of copper and other valuable metals |
| 03/01/2000 | EP0981652A1 Sulfide mineral concentrate bioleaching |
| 03/01/2000 | EP0948655A4 Recovery of nickel from bioleach solution |
| 03/01/2000 | CN1049925C Method for removing Mo, As, Sb, Sn from tungstate solution by precipitation |
| 02/29/2000 | US6030048 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/24/2000 | WO2000009915A1 Intertank screen sealing system |
| 02/24/2000 | WO2000009782A1 Method for the removal of sulfur in the nickel leaching process |
| 02/23/2000 | EP0980442A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/23/2000 | EP0843741B1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 02/23/2000 | CN1245221A Process for extracting gold and silver by removing impurities with acid and alkali |
| 02/23/2000 | CN1049695C Method for separating and purifying noble metal |
| 02/23/2000 | CN1049694C Method for separating trace metal in enriched solution by load fibre column |
| 02/23/2000 | CN1049693C Method for extracting copper from ore |
| 02/23/2000 | CN1049692C Method for extracting mixed rare earth oxide by roasting black weathered slime ammonium chloride |
| 02/16/2000 | CN1244589A Low-temperature cobalt-eliminating antimonate technology for zonc smelting wet process |
| 02/16/2000 | CN1049456C Method for recovering zinc from dregs containing zinc ferrite |
| 02/13/2000 | CA2245036A1 Hydrometallurigical process for recovery of zinc |
| 02/10/2000 | WO2000006785A1 Method for leaching sulfide-containing materials with microorganisms and use of sulphur-containing amino acids in leaching with microorganisms |
| 02/10/2000 | WO2000006784A1 Processing copper sulphide ores |
| 02/10/2000 | DE19836078A1 Verfahren zur mikrobiellen Laugung von sulfidhaltigen Materialien und Verwendung von schwefelhaltigen Aminosäuren bei der mikrobiellen Laugung A method for microbial leaching of sulfidic materials and use of sulfur-containing amino acids in the microbial leaching |
| 02/10/2000 | CA2336284A1 Processing copper sulphide ores |
| 02/08/2000 | US6022991 Metal complex forms by direct reaction of metal with dithiophosphorus acid disulfides without requiring the presence or the formation of nascent or gaseous hydrogen |
| 02/08/2000 | US6022406 Processing foundry dust, and in particular dust from electrical steelworks, preparing zinc ferrite |
| 02/02/2000 | CN2361638Y Reaction still for refining gold |
| 02/02/2000 | CN1049014C Removal of arsenic from rich arsenic materials |
| 02/02/2000 | CN1049012C Leaching extraction electrodeposition method for processing cupric oxide ore |
| 02/02/2000 | CN1048959C Process for production of cryolite by using kaolin |
| 01/25/2000 | CA1340885C Agglomerating agents for clay containing ores |
| 01/20/2000 | WO2000003044A1 A method for isolation and production of magnesium metal, magnesium chloride, magnesite and magnesium based products |
| 01/20/2000 | CA2336652A1 A method for isolation and production of magnesium metal, magnesium chloride, magnesite and magnesium based products |
| 01/19/2000 | EP0972001A1 Separation of heavy metals and materials for use in this |
| 01/13/2000 | WO2000001863A2 Method for recovering precious metals |
| 01/12/2000 | EP0971050A2 Process for partially neutralizing acidic metal chloride containing solutions and for preparing metal oxides |
| 01/12/2000 | EP0970258A1 Polymeric combinations used as copper and precious metal heap leaching agglomeration aids |
| 01/12/2000 | EP0813500B1 Purification of metal containing solutions |
| 01/12/2000 | EP0786021B1 Process for making copper foil |
| 01/12/2000 | CN1048288C Process for preparing single rare-earth oxide of more than 99.999% by cation exchange fibre chromatography |
| 01/12/2000 | CN1048287C Process for direct leaching sulfide mineral of zinc by compound catalytic oxidation |
| 01/12/2000 | CN1048286C Extraction of valuable metals from oceanic multimetal nodule by smelting-corrosion-extraction |
| 01/12/2000 | CN1048250C Macrocyclic polyether cryptand joined to inorganic carrier, and process for removing, separating and concentrating metals |
| 01/12/2000 | CN1048230C Process for producing alumina and fine alumina powder by salting-out |
| 01/05/2000 | EP0832306B1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 01/05/2000 | DE19829274A1 Verfahren zur Rückgewinnung von Edelmetallen A process for the recovery of precious metals |
| 01/04/2000 | US6009956 Method and apparatus for distributing fluid to a leach field surface |
| 12/29/1999 | EP0966325A1 Method for enriching silver or other precious metals by flotation from a suspension, for example from zinc-leaching residues |
| 12/29/1999 | CN1047809C Apparatus for solving zinc by using of electrolyte of acid containing liquid |
| 12/29/1999 | CN1047800C Method and apparatus for obtaining Co, Ni and Cu from ore by wet metallurgy |
| 12/23/1999 | WO1999066086A1 Method for dissolving plutonium or a plutonium alloy and converting it into nuclear fuel |
| 12/23/1999 | WO1999066085A1 Treatment of roasted metal sulphide ores and ferrites by leaching with peroxysulphuric acid |
| 12/23/1999 | WO1999066084A1 Process for separation of heavy metals from residues by use of ethylene-diamine-disuccinic acid (edds) complexant |
| 12/23/1999 | WO1999065824A1 Method for separating trivalent lanthanide cations by selective complexing |
| 12/23/1999 | WO1999056286A3 Method for reducing the level of radioactivity of a metal part |
| 12/23/1999 | CA2332050A1 Process for separation of heavy metals from residues by use of ethylene-diamine-disuccinic acid (edds) complexant |
| 12/22/1999 | EP0964830A1 Method for producing hyperazeotropic hydrochloric acid from metal chloride solutions |
| 12/19/1999 | CA2275098A1 Bacterial leaching of copper and zinc without iron leaching |
| 12/19/1999 | CA2241064A1 Bacterial medium for zinc leaching without iron leaching |
| 12/15/1999 | EP0963451A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 12/15/1999 | EP0963450A1 Leached nanocrystalline materials, method for making them and uses in the energetic sector |
| 12/15/1999 | CN1238420A In-situ chemical reactor for recovery of metals or purification of salts |
| 12/15/1999 | CN1047405C Technology of preparing high purity neodymia with ion exchange method |
| 12/12/1999 | CA2240450A1 Process for the treatment of roasted metal sulphide ores and ferrites |
| 12/09/1999 | WO1999063123A1 Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery |
| 12/09/1999 | CA2332243A1 Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery |