| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 04/29/2004 | WO2004035840A1 Method for the recovery of metals using chloride leaching and ex traction |
| 04/29/2004 | US20040079200 Chromatographic method of separating ruthenium from platium group metals |
| 04/29/2004 | DE10296846T5 Verfahren zum selektiven Entfernen von Molybdän aus flüssigen Mischungen, die dieses zusammen mit Vanadium enthalten A process for selectively removing molybdenum from liquid mixtures containing this together with vanadium |
| 04/28/2004 | EP1412546A1 A method for the removal of metals from an aqueous solution using lime precipitation |
| 04/28/2004 | EP1412545A1 Method for improving metals recovery using high temperature pressure leaching |
| 04/28/2004 | EP1261750B1 Wet process for refining silver bullion including gold separation |
| 04/28/2004 | CN1492951A Electrorefining process for separating metals |
| 04/28/2004 | CN1492948A Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| 04/28/2004 | CN1492062A Process for recovering palladium from TDI hydro genation waste palladium carbon catalyst |
| 04/28/2004 | CN1491891A New process for synthesizing lithium ion separation material |
| 04/28/2004 | CN1147598C Microbe-catalytic oxidization-reduction coupling process for extracting valuable metals from manganese oxide ore |
| 04/27/2004 | US6726889 Production of zinc oxide from acid soluble ore using precipitation method |
| 04/27/2004 | US6726887 Composition of oxime and hydroxy-ester for the solvent extraction of metals |
| 04/27/2004 | US6726847 Silver stain removal by chemical etching and sonication |
| 04/27/2004 | US6726828 Electrochemical processing |
| 04/22/2004 | WO2004033738A1 Hydrometallurgical processing of manganese containing materials |
| 04/22/2004 | WO2004033733A1 Hydrothermal mineral extraction |
| 04/22/2004 | WO2004033732A1 Method of iron (iii) hydroxide and oxide recovery by bacterial oxidation |
| 04/22/2004 | WO2004033086A1 Method and apparatus for separating ions from a fluid stream |
| 04/22/2004 | US20040076578 Comprises tubular reactor with continuous serpentine path; comprises pretreated feedstock including ilmenite, leueoxene, or titania slag leached with hot hydrochloric acid |
| 04/22/2004 | US20040074340 Method for the precipation of silica in connection with zinc ore leaching |
| 04/21/2004 | EP1409753A1 Solvent extraction of impurities from concentrated metal sulphate solutions |
| 04/21/2004 | EP1409640A1 Adaptation of bacteria for use in leaching |
| 04/21/2004 | CN1490419A Reproducing method for carrier gold activated carbon |
| 04/21/2004 | CN1146671C Metal gallium producing process and apparatus utilizing low-silicon iron |
| 04/15/2004 | WO2004031422A1 Heap leaching base metals from oxide ores |
| 04/15/2004 | US20040071619 Method for the purification of zinc oxide controlling particle size |
| 04/15/2004 | CA2406328A1 Separating platinum group elements from complex acidic solutions of base metals |
| 04/14/2004 | EP1408127A1 Method for recovering metals from the flying ashes generated in an integrated gasification combined cycle-type (igcc) thermal station |
| 04/14/2004 | EP1289628A4 Acid stable membranes for nanofiltration |
| 04/14/2004 | CN1145707C Method for producing platinum material reinforced with dispersed oside |
| 04/08/2004 | WO2004029333A2 Method and device for electroextraction of heavy metals from technological solutions and wastewater |
| 04/08/2004 | WO2004029308A1 Method for osmium distillation into gas phase from sulphur-acid sludge of copper production |
| 04/08/2004 | WO2004028964A1 Low viscosity copper solvent extraction reagent formulations |
| 04/08/2004 | WO2004028655A2 Filter cake treatment method |
| 04/08/2004 | US20040067183 Using sulfate; neutralization, leaching, electrolysis |
| 04/08/2004 | US20040065987 Apparatus for leaching zinc concentrates |
| 04/08/2004 | CA2499219A1 Low viscosity copper solvent extraction reagent formulations |
| 04/07/2004 | CN1487102A Method of recovering In from waste In-Sn oxide target |
| 04/06/2004 | US6716403 Recovering a copper component from a cleaning agent that has been used for removing a phosphine or a silane contained as a harmful component in a harmful gas. |
| 04/06/2004 | US6716353 Method for preparing high specific activity 177Lu |
| 04/01/2004 | WO2004027100A1 Introduction of microorganisms in bio-assisted heap leaching operations |
| 04/01/2004 | WO2004027099A1 Heap leach process |
| 04/01/2004 | US20040060395 Sulfidic iron-bearing copper concentrate is leached on the countercurrent principle, in a chloride environment with the aid of bivalent copper and an oxygen-bearing gas as a multistage continuous process |
| 04/01/2004 | CA2498949A1 Heap leach process |
| 03/31/2004 | CN1143717C Method and apparatus for adjusting the boundary surface between two solution and conducting both solution out of the separation part |
| 03/30/2004 | US6712874 Continuously reducing aqueous solution of nickel sulfate in pressurized space using hydrogen as reducing agent, at specified temperature and hydrogen pressure in autoclave divided by partitions into sections, each equipped with mixer |
| 03/25/2004 | WO2004024656A2 Process for reducing chromium in nonvolatile residue resulting from air oxidation of cyclohexane |
| 03/25/2004 | US20040055964 Comprises six-electrode-containing bipolar cylindrical electroreactor and application of alternating current |
| 03/24/2004 | CN1143002C Method for extracting anions of IVB to VIII metals using alkyl-substituted 1,3-diaminopropanes |
| 03/23/2004 | US6709642 Calixarene acetamido derivatives, preparation and use thereof for extracting strontium |
| 03/23/2004 | US6709641 Using dialkyl-substituted 1,3-diaminopropanes; high loading capacity |
| 03/18/2004 | WO2004022795A1 Process for recovering platinum group metals from material containing base metals |
| 03/18/2004 | WO2004022604A2 Solvent extraction process |
| 03/18/2004 | WO2004005557B1 Metal compound removal |
| 03/18/2004 | US20040052707 Solvent extraction of impurities from concentrated metal sulphate solutions |
| 03/18/2004 | US20040050797 Scale removal or prevention |
| 03/18/2004 | US20040050780 Process for reducing chromium nonvolatile residue resulting from air oxidation of cyclohexane |
| 03/18/2004 | US20040050212 Subjecting the leach solution to separate solvent extraction steps using an organophosphoric acid, a carboxylic acid and an organophosphinic acid |
| 03/18/2004 | DE10335448A1 Process for recovering tantalum and niobium from raw materials containing tantalum oxide and niobium oxide comprises digesting the raw materials with hydrofluoric acid and extracting with a water-insoluble organic solvent |
| 03/18/2004 | CA2497993A1 Process for recovering platinum group metals from material containing base metals |
| 03/17/2004 | CN1483088A Method for leaching copper concentrate |
| 03/17/2004 | CN1482263A Method for producing high-purity zinc from zinc oxide ore |
| 03/17/2004 | CN1142004C A method for extracting copper from an aqueous solution |
| 03/16/2004 | US6706186 Raising the viscosity and dispersing solution into drops; copper sulfate |
| 03/16/2004 | CA2342692C A process for recovering gold from thiosulfate leach solutions and slurries with ion exchange resin |
| 03/12/2004 | WO2004024962A1 Method and apparatus for heating a slurry to a predetermined temperature |
| 03/11/2004 | WO2004020678A1 Removal of carbonaceous materials and magnesium from zinc silicate flotation concentrate by treatment in autoclave with zinc-bearing spent solution |
| 03/11/2004 | US20040047780 Extraction of a base metal such as Ni, Co or Zn, from a sulphide ore or concentrate containing copper and the base metal comprises the step of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic |
| 03/11/2004 | US20040045834 Process for the utilization of vanadium bound in chromium ore as vanadium(V) oxide by electrolysis |
| 03/11/2004 | US20040045406 During metal recovery process from an ore, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid species which otherwise tend to passivate the reactive process or encapsulate the metal value |
| 03/11/2004 | US20040045405 The process of the present invention recovers platinum group metal(s), such as platinum and palladium, from PGM-containing materials containing base metals, such as copper and nickel. The process controls sulfur levels by using solvent extraction |
| 03/10/2004 | EP1242638B8 A process for the recovery of copper from aqueous solutions containing iodinated organic compounds |
| 03/10/2004 | CN1480541A Method for extracting cobalt from industrial waste residue |
| 03/09/2004 | US6702872 Preventing oxime extractant degradation; employing ph adjustment or electromotive force reduction |
| 03/09/2004 | US6702871 Neutralization of aqueous nickel sulfate solution with alkali or alkaline earth hydroxide; catalytic hydrogen reduction of nickel hydroxide slurry under atmospheric conditions |
| 03/04/2004 | WO2003087416A9 Process for extracting platinum group metals |
| 03/04/2004 | WO2003084864A3 Method of producing high-purity indium powder |
| 03/04/2004 | US20040042945 Electrolysis; solvent extraction; ion exchanging |
| 03/03/2004 | CN1479793A Mtehod for hydrolytic precitpitation of iron |
| 03/02/2004 | US6699446 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; |
| 02/26/2004 | WO2004016816A1 Recovering nickel |
| 02/26/2004 | WO2004016376A1 Metal nanocrystals and synthesis thereof |
| 02/26/2004 | US20040038354 Establishing an environment wherein microorganisms oxidise a slurry containing metal sulphide minerals, supplying a feed gas containing in excess of 21% oxygen by volume to the slurry, and extracting bioproducts from the slurry |
| 02/26/2004 | US20040035252 Thiosulfate lixiviants that include at most only small amounts of copper and/or ammonia and operate at low ph, reduction of polythionates |
| 02/25/2004 | EP1390299A1 Autoclave control mechanisms for pressure oxidation of molybdenite |
| 02/25/2004 | EP1390113A1 Production of pure molybdenum oxide from low grade molybdenite concentrates |
| 02/25/2004 | EP1237860B1 Calixarenes |
| 02/25/2004 | EP1055008B1 Hydrogen-free regeneration of dithiophosphorus metal extractants |
| 02/25/2004 | CN1477217A Leaching process of zinc oxide ore |
| 02/25/2004 | CN1477216A Zinc sulfide concentrate calcines and zinc ide ore combined leaching process |
| 02/25/2004 | CN1477215A Method for extracting gold and silver from indissoluble gold and silver preparation concentrate |
| 02/25/2004 | CN1139665C Agitator bath for pre-treating refractory As-containing gold ore by impregnating in strong alkali solution |
| 02/24/2004 | US6696589 Supported liquid membrane strip dispersion process for removal and recovery of one or more radionuclides or metals from a feed solution containing the radionuclides by treating with extractant |
| 02/24/2004 | US6696283 Metal recovery; having inoculate of sulfur biooxidizing bacteria; crush strength |
| 02/24/2004 | US6696037 Method of recovering sulfur from minerals and other sulfur-containing compounds |
| 02/24/2004 | US6696029 Method for the purification of zinc oxide controlling particle size |
| 02/19/2004 | WO2004015149A1 Method for producing antimony from concentrate |
| 02/19/2004 | US20040031759 Dielectric and non-magnetic fluid conduits as fluid passageway, containing a magnetic field generator and electrostatic field generator to form the flux lines of the magnetic and electrostatic field; desalting seawater |
| 02/19/2004 | US20040031356 Process for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |