| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 01/09/2002 | EP1170389A2 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions |
| 01/09/2002 | EP1012351B1 Chloride assisted hydrometallurgical extraction of copper from sulphide ore materials |
| 01/08/2002 | CA2221940C Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 01/03/2002 | WO2002000951A1 Method for producing platinum material reinforced with dispersed oxide |
| 01/03/2002 | WO2002000948A1 Method for producing refractory metals from a concentrate of laporite |
| 01/03/2002 | WO2001036693B1 Recovery of metals from ore by bioleaching with sulfur addition |
| 01/03/2002 | US20020002290 Calixarenes and their use for sequestration of metals |
| 01/03/2002 | US20020001552 Treatment of roasted metal sulphide ores and ferrites by leaching with peroxysulphuric acid |
| 01/02/2002 | EP1167555A1 Chromatographic interseparation of platinum group metals |
| 01/02/2002 | EP1165847A1 Cyanide recovery from aqueous ore processing solutions by solvent extraction |
| 01/02/2002 | CN1077143C Method for lowering oxygen content in value metal materials |
| 12/30/2001 | CA2313144A1 Reduction and oxidation of transition metals, including platinum group metals, without the use of aqua regia |
| 12/27/2001 | WO2001098548A2 Chromatographic interseparation of platinum group metals |
| 12/27/2001 | WO2001098546A1 Method for sulphuric acid treatment and recycling of blast furnace sludge |
| 12/27/2001 | US20010055553 Method for separating copper from iron |
| 12/26/2001 | CN1328164A Efficient additive for extracting vanadium and its preparing process |
| 12/20/2001 | WO2001096621A1 Solvent extraction of impurities from concentrated metal sulphate solutions |
| 12/20/2001 | CA2444104A1 Solvent extraction of impurities from concentrated metal sulphate solutions |
| 12/19/2001 | CN2466158Y Apparatus for producing metallic gallium from corundum slag low-silicon iron |
| 12/19/2001 | CN1327483A Process and equipment for separation of gold particles |
| 12/19/2001 | CN1076401C Process for preparing gold by reduction of gold-contained chlorated liquid |
| 12/18/2001 | US6331200 From noble metal solutions containing nitrate, gold ions are reduced to gold by the addition of an acid fe.sup.2+ solution, the concentration of h.sup.+ in the fe.sup.2+ |
| 12/18/2001 | CA2209559C Gold recovery from refractory carbonaceous ores by pressure oxidation, thiosulfate leaching and resin-in-leach adsorption |
| 12/13/2001 | WO2001094650A2 Process for the recovery of natural nanoclusters of metals and other elements and the nanoclusters isolated thereby |
| 12/13/2001 | US20010051121 Process for treating alumina-bearing ores to recover metal values therefrom |
| 12/13/2001 | US20010050255 Solution mining process for removing metals from aqueous solution |
| 12/12/2001 | EP0783593B1 Method for recovering metal and chemical values |
| 12/11/2001 | US6328782 Combined supported liquid membrane/strip dispersion process for the removal and recovery of radionuclides and metals |
| 12/06/2001 | WO2001091873A2 Polysulfonamide matrices |
| 12/05/2001 | EP1159461A1 Recovery of nickel and cobalt from ore |
| 12/05/2001 | EP1159460A1 Filter-press type electrochemical cell |
| 12/05/2001 | EP0991786B1 Separating metal ions absorbed on a resin and installation for recycling photographic effluents including an exchanger and an electrolysis vessel |
| 12/05/2001 | CN1075839C Treatment method for reusable cyanide gold-leaching lean solution |
| 11/29/2001 | WO2001089654A2 Acid stable membranes for nanofiltration |
| 11/29/2001 | WO2001038590A3 Solvent extraction process for the recovery of valuable metals from acidic leachates |
| 11/28/2001 | EP1080238B1 Method for processing residues containing at least one non-ferrous metal and/or compounds thereof |
| 11/28/2001 | CN1323908A Optimal dissolving method of preparing rare earth fluorochloride material liquid from bastnasite concentrate |
| 11/28/2001 | CN1075468C Separating and refining process for Co-Mn mixture |
| 11/27/2001 | US6323055 Purifying k2taf7; reducing the purified ktaf7 to produce tantalum powder, refining the tantalum by reacting with iodine and finally electron beam melting the tantalum to form a high purity tantalum ingot. |
| 11/27/2001 | US6322702 Dissolving fluorinated alcohols in an solvent, reacting with a aqueous alkaline solution forming an hydroxide-depleted aqueous phase and a fluorinated alkoxide-containing recovery phase and separating the two |
| 11/22/2001 | WO2001088212A2 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | WO2001032944B1 Method for leaching nickeliferous oxide ores of high and low magnesium laterites |
| 11/22/2001 | DE10022867A1 Precipitation of nickel and lead ions from iron(II) salt solution, from e.g. lixiviation of cyclone dust from titanium dioxide production by chloride process, involves using excess alkali sulfide and filtration after dwell |
| 11/22/2001 | CA2756715A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2745928A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2745806A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2698578A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/21/2001 | EP1155155A1 Sulphidisation of sulphide ores for hydrometallurgical extraction of copper and other metals |
| 11/21/2001 | CN1075120C Process for extracting manganese ore with sulfuric acid under ordinary temperature |
| 11/20/2001 | US6319483 Separating jarosite from other components of the solution and concentrating the gallium by dividing into solid and liquid fractions; |
| 11/20/2001 | US6319482 Treatment of fly ASH/APC residues including lead salt recovery |
| 11/15/2001 | WO2001036693A3 Recovery of metals from ore by bioleaching with sulfur addition |
| 11/15/2001 | US20010039854 Adding at least one peroxy oxidant, the oxidant oxidizes the sulphite contained in the gold sulfite complex to sulfate and reduces the gold contained in the complex to its metallic form |
| 11/14/2001 | EP0918094B1 Hydrometallurgical process for the recovery of nickel and cobalt by ammoniacal leaching |
| 11/14/2001 | CN1321783A Method for preparing high-purity zinc oxide by using smithsonite |
| 11/14/2001 | CN1321782A Wet process for extracting vanadium from waste catalyst |
| 11/13/2001 | US6315812 Subjecting host material to an oxidative pressure sulfuric acid leach process in the presence of a chloride salt, and at 210-230 degrees c.; solution has an acid strength of at least 1 g/l, to form a precious metal-bearing chloride complex |
| 11/13/2001 | US6315811 Method for producing platinum |
| 11/08/2001 | WO2001083835A2 Gold recovery process with hydrochloric acid lixiviant |
| 11/07/2001 | CN1074465C Copper recovery |
| 11/07/2001 | CN1074464C Process for recovering metals of indium, iron, silver and tin from high-indium high-iron zinc concentrate |
| 11/06/2001 | USH2005 Bacterial oxidation |
| 11/06/2001 | US6312654 Separation trivalent actinide elements, lanthanide and/or yttrium in acid solutions, extracting |
| 11/06/2001 | US6312653 Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes |
| 11/06/2001 | US6312642 Method for controlling the oxygen content in valve metal materials |
| 11/06/2001 | US6312500 Heap leaching of nickel containing ore |
| 10/31/2001 | EP1149927A1 Method and equipment for the processing of a gold bath |
| 10/30/2001 | US6309614 Strontium nitrate |
| 10/25/2001 | WO2001080251A2 A method for isolating and purifying ?90y from 90¿strontium in multi-curie quantities |
| 10/25/2001 | WO2001078913A1 Materials and method for the biological production of sulfuric acid |
| 10/25/2001 | WO2000047785A9 Processing route for direct production of mixed rare earth metal oxides by selective extraction |
| 10/25/2001 | US20010033823 Dissolving in sulfuric acid; forming manganese sulfate;electrolytic oxidation to manganese dioxide |
| 10/25/2001 | US20010033814 Novel solvent for the simultaneous recovery of radionuclides from liquid radioactive wastes |
| 10/24/2001 | CN1319145A Method for production of high-purity concentrated magnesium chloride solution |
| 10/24/2001 | CN1318649A Stirring lixiviation and backflash process of ionic rare earth |
| 10/24/2001 | CN1073634C Membrane powderless electrolysis process |
| 10/24/2001 | CA2344129A1 Assaying and/or recovering precious metals |
| 10/18/2001 | WO2001034856A8 Recovery of metal values from aqueous solutions and slurries |
| 10/18/2001 | US20010030157 Process and apparatus for the purification and/or treatment of suspensions |
| 10/18/2001 | US20010029811 Use of mixture of C9 alkylsalicylaldoxime and ketoxime as extractant in water-immiscible organic solvent solution in metal extraction circuit to enhance transfer of iron values to dilute acid wash solution |
| 10/18/2001 | US20010029810 Alkyl phenylphosphonic acid extractants and processes for their manufacture |
| 10/17/2001 | EP1144699A1 Method for extracting anions of ivb to viii metals using alkyl-substituted 1,3-diaminopropanes |
| 10/17/2001 | CN1072995C Process for making finely divided, dense packing spherical shaped silver particles |
| 10/16/2001 | US6302942 Methods for removing pollutants from contaminated soil materials with a fern plant |
| 10/11/2001 | WO2001075184A2 Heap leaching of nickel containing ore with sulfuric acid |
| 10/11/2001 | WO2001042520A8 Method of high-temperature digesting titanium containing material with sulfuric acid |
| 10/11/2001 | CA2404003A1 Heap leaching of nickel containing ore |
| 10/10/2001 | EP1141424A1 Composition of oxime and hydroxy-ester for the solvent extraction of metals |
| 10/10/2001 | CN1316532A Extraction method for ore containing As and others difficult to process |
| 10/09/2001 | US6299776 Biochemical oxidation system and process |
| 10/04/2001 | WO2001073144A2 Solvent extraction process for the separation of cobalt from nickel in aqueous sulphate-containing solutions |
| 10/04/2001 | US20010025548 Forming adduct of rhodium chloride and metal halide; carbonylation to rhodium halogen carbonyl; oxidation to hydrate; reduction to rhodium sponge |
| 10/04/2001 | EP1138791A1 Process for the recovery and refining of rhodium |
| 10/04/2001 | EP1137820A1 High purity tantalum and products containing the same like sputter targets |
| 10/04/2001 | EP0946766B1 Method for leaching zinc concentrate in atmospheric conditions |
| 10/02/2001 | US6297395 Calixarenes and their use for sequestration of metals |
| 10/02/2001 | US6296824 Method for producing rare earth oxysulfide powder |
| 10/02/2001 | CA2021292C Recovery of precious metals |
| 09/27/2001 | WO2001070409A1 Pseudophasic extraction method for the separation of ultra-fine minerals |
| 09/27/2001 | WO2001070004A2 Solution mining process for removing metals from aqueous solution |