| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 08/29/2000 | US6110253 High temperature heap bioleaching process |
| 08/24/2000 | WO2000049187A1 Process for making copper wire including solvent extraction, electrodeposition and cold working |
| 08/24/2000 | WO2000048944A1 Improved methods for leaching of ores |
| 08/24/2000 | DE19859683C1 Verfahren zur Extraktion von Anionen A process for extraction of anions |
| 08/23/2000 | EP1028845A1 System for extracting soluble heavy metals from liquid solutions |
| 08/23/2000 | EP0993510A4 Method for phytomining of nickel, cobalt and other metals from soil |
| 08/22/2000 | US6107065 Forming a concentrate of sulfide minerals from ore, coating onto coarse substrates, forming a heap with bacteria, and biooxidizing the mineral on the surface at a rate at least two times greater than average |
| 08/22/2000 | US6106589 Reducing gold complex in aqueous solution |
| 08/17/2000 | WO2000047785A1 Processing route for direct production of mixed rare earth metal oxides by selective extraction |
| 08/17/2000 | WO2000047556A1 Complexing agents |
| 08/17/2000 | DE19928028C1 High purity gold is recovered from nitrate solution by nitrate decomposition to obtain a highly acidic solution from which gold is recovered by ferric ion addition |
| 08/16/2000 | CN1263166A Treatment method of reusable cyanide gold-leaching lean solution |
| 08/16/2000 | CN1263164A Technological process for directly producing mixed rare earth oxide |
| 08/16/2000 | CN1055505C Extraction procedure of vanadium smelting |
| 08/15/2000 | US6103204 Selective bioleaching of zinc |
| 08/10/2000 | WO2000046412A1 Integration processes of the treatments of concentrates or zinc silicates ore and roasted concentrates of zinc sulphides |
| 08/09/2000 | EP1026268A1 Nickel fine powder and method for preparing the same |
| 08/09/2000 | EP1025269A1 Process for the extraction of metals from ammoniacal solution |
| 08/09/2000 | EP0909335B1 Treatment of fly ash/apc residues including lead salt recovery |
| 08/09/2000 | CN1262710A Method for dissociating metals or metal compounds |
| 08/08/2000 | US6099615 Method for improved percolation through ore heaps by agglomerating ore with a surfactant and polymer mixture |
| 08/02/2000 | EP0862659B1 METHOD FOR RECOVERING NICKEL FROM HIGH MAGNESIUM-CONTAINING Ni-Fe-Mg LATERITIC ORE |
| 08/02/2000 | CN1055132C Method for treating high-germanium alum precipitation liquid |
| 08/02/2000 | CN1055131C Aluminium-sodium composite lithium salt and application thereof |
| 08/01/2000 | US6096113 Integrated, closed tank biooxidation/heap bioleach/precious metal leach processes for treating refractory sulfide ores |
| 07/26/2000 | EP1022349A1 Method for removing metals from a citric acid cleaning solution |
| 07/26/2000 | CN1261107A Defluorination process for preparing cerium from bastraesite ore |
| 07/26/2000 | CN1054887C Process for producing low-zinc and low-magnesium mixed rare-earth metal |
| 07/22/2000 | WO2000043558A1 Cyanide recovery from aqeuous ore processing solutions by solvent extraction |
| 07/19/2000 | EP1020537A1 Separation and concentration method for recovering gallium and indium from solutions by jarosite precipitation |
| 07/19/2000 | EP1019555A1 Detection and extraction of an ion in a solution, particularly uranium ion |
| 07/19/2000 | EP1019553A1 Method for dissociating metals or dissociating metal compounds |
| 07/19/2000 | EP1019552A1 Method for separating trivalent actinides from at least one trivalent lanthanide by means of (bis)aryldithiophosphonic acid as organophosphate as synergist |
| 07/19/2000 | EP1019551A1 Separation of platinum group metals |
| 07/19/2000 | EP0909336B1 Process for recovery of zinc from sphalerite containing ores or concentrates |
| 07/19/2000 | CN1054646C Organic phase continuous saponification technique |
| 07/19/2000 | CN1054645C Method for continuously concentrating rare earth feed liquid by extraction method |
| 07/19/2000 | CN1054644C Solvent extraction and separation method for thulium, ytterbium and lutetium |
| 07/18/2000 | US6090354 Process for the production of titanium oxide |
| 07/18/2000 | US6090341 Gold is extracted from the ore and dissolved in a chemical solution to form a gold complex. complex is reduced to gold from the solution |
| 07/12/2000 | CN1259583A Method of reducing low concn. gold ion in aqueous solution by bacterial adsorption |
| 07/11/2000 | US6086656 Method for improving the heap biooxidation rate of refractory sulfide ore particles that are biooxidized using recycled bioleachate solution |
| 07/11/2000 | CA2162052C Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis |
| 07/06/2000 | WO2000039428A2 Artificial aquifers in hydrologic cells for oil recovery |
| 07/06/2000 | WO2000039350A1 Method for extracting anions of ivb to viii metals using alkyl-substituted 1,3-diaminopropanes |
| 07/06/2000 | CA2355853A1 Method of extracting anions of metals of groups ivb to viii by means of alkyl-substituted 1,3-diaminoprpopanes |
| 07/05/2000 | EP1015386A1 Continuous non-polluting liquid phase titanium dioxide process |
| 07/05/2000 | CN1258752A Recovery method of copper and zinc oxide from waste copper-zinc catalyst |
| 07/04/2000 | US6083730 Biooxidizing metal sulfide particles from sulfide ore using a static apparatus to liberate metal; obtaining a precipitate of metal sulfide particles, coating the surface of coarse substrates, biooxidizing metal sulfide particles |
| 07/04/2000 | US6083400 Method and apparatus for recirculating a heavier solution from the separation part of two separable solutions into a mixing unit |
| 06/29/2000 | WO2000037690A1 Silver-catalyzed bio-leaching process for copper extraction from chalcopyrite heap |
| 06/28/2000 | EP1012352A1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide or laterite ores |
| 06/28/2000 | EP1012351A1 Chloride assisted hydrometallurgical extraction of copper from sulphide ore materials |
| 06/28/2000 | EP1012350A1 Method for reprocessing materials containing precious metals by means of chromatographic separation and fractionation |
| 06/27/2000 | US6079130 Portable gold mining dredge |
| 06/27/2000 | CA1341041C Gallium purification using n-organohydroxamic acids |
| 06/22/2000 | WO2000036168A1 High temperature heap bioleaching process |
| 06/22/2000 | WO2000036167A1 Composition of oxime and hydroxy-ester for the solvent extraction of metals |
| 06/22/2000 | WO2000036166A1 Process and equipment for the separation of gold particles |
| 06/22/2000 | WO2000035556A1 Methods and apparatus for an improved pressure filter |
| 06/22/2000 | CA2355062A1 Process and equipment for the separation of gold particles |
| 06/21/2000 | CN1053704C Separation and enrichment processf of minute amount of noble metal elements in solution by utilizing carrying fiber column |
| 06/15/2000 | WO2000034537A1 Hydrogen-free regeneration of dithiophosphorus metal extractants |
| 06/15/2000 | WO2000001863A3 Method for recovering precious metals |
| 06/14/2000 | EP1008662A1 Electrode apparatus with perforated conductor electrode |
| 06/14/2000 | EP1007747A1 Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes |
| 06/14/2000 | CN1053475C Bacteria culturing device for microbe-preoxidation gold-lixiviating tech. |
| 06/13/2000 | US6075130 Calixarene containing upper rim and a lower rim, atleast one ionizable group attached to lower rim and a radionuclide ion from lantahnide elements bound to ionizable group |
| 06/06/2000 | CA2155209C Process for making copper foil |
| 06/02/2000 | WO2000031310A1 High purity tantalum and products containing the same like sputter targets |
| 06/02/2000 | WO2000031308A1 Thlaspi caerulescens subspecies for cadmium and zinc recovery |
| 06/02/2000 | WO2000031087A1 Calixarene derivatives |
| 06/02/2000 | CA2352336A1 High purity tantalum and products containing the same like sputter targets |
| 06/02/2000 | CA2352179A1 Thlaspi caerulescens subspecies for cadmium and zinc recovery |
| 05/30/2000 | US6069209 Chelating resins for use in selectively binding heavy metals |
| 05/25/2000 | WO2000029629A1 Bio-oxidation process and apparatus |
| 05/25/2000 | WO2000014763A8 Image display, method for disassembling the same, and method for recovering part |
| 05/25/2000 | CA2350476A1 Bio-oxidation process and apparatus |
| 05/24/2000 | CN1254025A Antimony-removing and impurity-removing method for copper electrolytic solution |
| 05/24/2000 | CN1254024A Process for extracting and separating cerium and thorium from hamartite leachate |
| 05/24/2000 | CN1254023A Leaching-out method for extracting vanadium from vanadium-containg ore calcines and its application in stone-coal calcination-direct vanadium-extracting process |
| 05/24/2000 | CN1254020A Orientation silicon-iron sheet with excellent magnetic property and its production method |
| 05/24/2000 | CN1253845A Method for recovering gold from float gold concentrate calcine waste pulp |
| 05/23/2000 | US6066229 Method of recycling disk recording medium and apparatus for recovering metal reflective film |
| 05/23/2000 | CA2134490C Process for the preparation of a high purity cobalt intermediate |
| 05/18/2000 | WO2000028099A1 Improved reactor |
| 05/18/2000 | WO2000028093A1 Recovering metals from soil |
| 05/18/2000 | DE19844546C1 Production of zinc sulfide, useful in hydrometallurgical recovery of zinc, involves filtering and washing precipitate obtained from residual impure zinc sulfate electrolyte and impure sodium sulfide solution from barium sulfate production |
| 05/17/2000 | EP0788394B1 Process for the treatment of contaminated material |
| 05/17/2000 | CN1253184A Process for cyanogen-free lixiviating of gold from gold-contained substances |
| 05/16/2000 | US6063158 Sulfide mineral concentrate bioleaching |
| 05/16/2000 | CA2155207C Process for making copper metal powder, copper oxides and copper foil |
| 05/11/2000 | WO2000026421A1 Polymers with ligands bound thereto for metal extractions in liquid carbon dioxide |
| 05/11/2000 | WO2000025882A1 Method for reducing the size of solvent extraction process steps and cell for using in the solvent extraction process |
| 05/11/2000 | CA2347795A1 Method for reducing the size of solvent extraction process steps and cell for using in the solvent extraction process |
| 05/10/2000 | CN1052265C Chloride assisted hydrometallurgical extraction of copper |
| 05/10/2000 | CN1052264C Metallurgical technology of sulfuric acid treatment of concentrated gold ore powder |
| 05/09/2000 | US6060029 Process for extraction of metals from aqueous ammoniacal solutions with beta-diketone extractants while maintaining a voltage potential to control entrainment of the aqueous layer into the organic layer |
| 05/04/2000 | WO2000024943A1 Treating niobium and/or tantalum containing raw materials |
| 05/04/2000 | CA2356988A1 Treating niobium and/or tantalum containing raw materials |