| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 09/22/2004 | CN1530452A Method and apparatus for removing copper, cadmium and cobalt from zinc sulfate solution |
| 09/22/2004 | CN1167818C Chloride assisted hydrometallurgical extraction of copper from sulphide ore materials |
| 09/22/2004 | CN1167816C Method and apparatus for controllable conducting solution obtd from liquid-liquid extraction to wide settle |
| 09/16/2004 | WO2004079840A2 Three-dimensional flow-through electrode and electrochemical cell |
| 09/16/2004 | WO2004079023A1 Microorganism and method for leaching mineral sulphides |
| 09/16/2004 | US20040179991 hydrometallurgy |
| 09/16/2004 | US20040179985 a leaching phase in which the electronic scrap is treated with a leaching solution based on cupric chloride and an alkaline chloride to dissolve the metals exposed to said solution, with the exception of gold, and a subsequent recovery phase of gold in solid form. |
| 09/16/2004 | US20040179984 Process for removing metal impurities from wet process phosphoric acid and compositions thereof |
| 09/16/2004 | CA2558468A1 Microorganism and method for leaching mineral sulphides |
| 09/15/2004 | EP1457577A1 Process for recovering metals, in particular precious metals, from electronic scrap |
| 09/15/2004 | EP1456427A1 Integrated ammoniacal solvent extraction and hydrogen reduction of nickel |
| 09/15/2004 | EP1456426A1 A method for the recovery of cobalt |
| 09/15/2004 | EP1456424A1 4-(alpha branched)acyl- (3h)-pyrazol-3-ones for use in the extraction of metals, especially copper, from solution |
| 09/15/2004 | CN1528925A Method for continuous leaching-out of zinc-lead in primary lead-zinc sulfide ore |
| 09/15/2004 | CN1166790C Method of recovering Pd from low-concentration waste Pd ion liquid with becteria thallus |
| 09/15/2004 | CN1166789C United decomposition technology of tungstite, wolframite alkali decomposition |
| 09/15/2004 | CN1166788C Optimal dissolving method of preparing rare earth fluorochloride material liquid from bastnasite concentrate |
| 09/15/2004 | CN1166565C Process for preparing thiomolybdate for molybdenum separated from sodium tungstate solution containing molybdenum |
| 09/14/2004 | US6792336 Learning-based controller for biotechnology processing, and method of using |
| 09/14/2004 | US6790418 Materials and method for the biological production of sulfuric acid |
| 09/14/2004 | CA2309225C A method for recovering the valuable metal content of a sulphuric acid leaching solution |
| 09/10/2004 | WO2004076698A1 Method for recovery of zinc by countercurrent leaching |
| 09/10/2004 | WO2004076697A1 Extraction of metals with diquaternary amines |
| 09/10/2004 | WO2004076509A2 Phosphorous dendrimers, preparation method thereof and use of same for the extraction of actinides and lanthanides |
| 09/10/2004 | CA2524808A1 Extraction of metals with diquaternary amines |
| 09/10/2004 | CA2516411A1 Method for recovery of zinc by countercurrent leaching |
| 09/09/2004 | US20040173057 Leach column and method for metal recovery |
| 09/09/2004 | DE10308269A1 Recovering nickel comprises loosening reduced ore with inert gas during cooling and indirectly cooling using cooling medium |
| 09/08/2004 | EP1453985A1 A method for precipitating iron from a zinc sulphate solution as hematite |
| 09/08/2004 | CN1527739A Polysulfonamide matrices |
| 09/08/2004 | CN1165488C Continuous non-polluting liquid phase titanium dioxide process |
| 09/07/2004 | US6787117 Porous hollow fiber membrane having chelate formability and method for recovery of germanium oxide using the porous hollow fiber membrane |
| 09/07/2004 | US6786948 Growing hyperaccumulating alyssum plant; maintaining calcium; drying, recovering |
| 09/02/2004 | US20040168909 Efficient supplying current; rods of electroconductive material such as graphite; determination spacings; water treatment ; metallurgy ; pollution control |
| 09/01/2004 | EP1451380A2 Process for the treatment of molybdenum concentrate also containing copper |
| 09/01/2004 | CN1525878A Acid stable membranes for nanofiltration |
| 09/01/2004 | CN1164776C Preparation of active zinc oxide from zinc dross by ultrasonic-microwave process |
| 09/01/2004 | CN1164775C Ammonium salt liquid phase oxidation direct leaching method for nonferrous metal sulfide mineral |
| 09/01/2004 | CN1164774C Method for separating cobalt and zirconium from Co/ZrO2-SiO2 waste catalyst |
| 09/01/2004 | CN1164746C Sulfide ore leaching bacteria strain protoplast fusion technique |
| 08/31/2004 | US6783744 For recovery of high purity zinc oxide products and optionally iron carbon feedstocks from industrial waste streams containing zinc oxide and/or iron; waste streams treated by adding carbon and ammonium chloride displacing undesired metal |
| 08/31/2004 | US6783711 Process for preparing a sulfonamide polymer matrix |
| 08/31/2004 | US6783687 Desalination; fresh water for drinking and irrigation; magnetic field and electrostatic field |
| 08/26/2004 | WO2004072636A1 Measuring rate of change of oxygen concentration and intrinsic oxidation rate in a pile of material |
| 08/26/2004 | US20040166040 Electrochemical method and apparatus for producing and separating ferrate(VI) compounds |
| 08/25/2004 | CN1523125A Method for recovering economic metal bacteria from slag |
| 08/25/2004 | CN1523124A Non-cyanidation gold lixiviating method |
| 08/24/2004 | US6780384 Method and system for recovering zirconium values from a hard rock ore containing uranium |
| 08/24/2004 | US6780221 Including outer and inner containers defining chambers with first reaction media in inner chamber and second reaction media in outer chamber; solution flows through inlet, first reaction media, conduit, second reaction media, outlet |
| 08/24/2004 | CA2270079C Recovery of nickel from bioleach solution |
| 08/24/2004 | CA2131575C Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution |
| 08/19/2004 | US20040161374 Treated manganese ore, process for producing the same, and use thereof |
| 08/19/2004 | US20040159187 Method for the reduction of nickel from an aqueous solution |
| 08/18/2004 | EP1289637A4 Polysulfonamide matrices |
| 08/18/2004 | CN1162558C Process for extracting and separating thorium and extracting rare earth chloride from sulfuric and phosphoric mixed acid system |
| 08/12/2004 | WO2004067787A1 Process for nickel and cobalt extraction from laterite ores |
| 08/12/2004 | WO2004067449A1 Modular device and methods for copper exploitation from waste, flotation waste, mine waters and waste waters |
| 08/12/2004 | US20040156765 low operational and cost investments; at atmospheric pressure and at low oxidation temperatures prior to leaching; producing tailings devoid of elemental sulfur, sulfides, or soluble sulfates and by fast reaction rates |
| 08/12/2004 | CA2512865A1 Process for nickel and cobalt extraction from laterite ores |
| 08/11/2004 | CN1519384A Preparing mixed rare arths by modified extracting fatty acid of castor oil and preparation method |
| 08/11/2004 | CA2418689A1 Gold and silver recovery from polymetallic sulfides by treatment with halogens |
| 08/10/2004 | US6773487 Process for refining silver bullion with gold separation |
| 08/10/2004 | US6773485 Method for recovering catalytic metals using a porous metal filter |
| 08/05/2004 | US20040151657 Reating thiosulfate with sulfide compound; separation od sulfur; reducing sulfur to sulfide; circulation |
| 08/05/2004 | US20040151644 Method of recovering a cleaning agent |
| 08/05/2004 | US20040149590 Process for producing electrolytic manganese dioxide |
| 08/04/2004 | CN1160474C Process for preparing low-Pb low-Mg mixed rare-earth metal by alkali method |
| 08/03/2004 | US6770249 Hydrometallurgical process utilizing an atmospheric calcium chloride leach to selectively recover from various metal feed stocks |
| 07/29/2004 | WO2004063227A2 Solvent extraction landfill system and method |
| 07/29/2004 | US20040146439 Method for recovering metal values from metal-containing materials using high temperature pressure leaching |
| 07/29/2004 | US20040146438 Method for recovery of metals from metal-containing materials using medium temperature pressure leaching |
| 07/29/2004 | US20040144209 Non-biochemical method to heap leach copper concentrates |
| 07/29/2004 | US20040144208 Process for refining raw copper material containing copper sulfide mineral |
| 07/29/2004 | US20040144155 Compositions and methods for removing pollutants from contaminated water with a fern plant |
| 07/28/2004 | CN1516747A Removal of non-water soluble substances from solutions of aqueous metal extracts |
| 07/27/2004 | US6767522 Increasing efficiency of thiobacillus attack using cysteine, methionine or derivatives; eliminating environmentally unsafe additives; speeding up recovery of copper or gold from pyrite ores |
| 07/27/2004 | CA2162270C Process for removing, separating and concentrating metals |
| 07/22/2004 | US20040141896 For the stabilization of capacity, the extraction cells and their piping are constructed and situated in such a way, that the extraction stages can be connected in different combinations, either in parallel or in a series |
| 07/21/2004 | EP1438439A1 A method for purifying the solution in the hydrometallurgical processing of copper |
| 07/21/2004 | CN1514029A Method of extracting rare earth from apatite |
| 07/20/2004 | US6764662 Roasting rhodium in air to rhodium oxide (rh2o3); leaching, acidification, purification |
| 07/20/2004 | CA2301631C Method and apparatus for controllably conducting a solution obtained from liquid-liquid extraction of two solutions and mixed into dispersion, to a wide settler |
| 07/20/2004 | CA2105859C Semi-continuous bacterial leaching process |
| 07/15/2004 | WO2004059018A1 Recovering metals from sulfidic materials |
| 07/15/2004 | WO2004044253A3 Method of leaching beryllium from beryllium-containing ores using fluosilicic acid |
| 07/14/2004 | EP1200633A4 $i(THLASPI CAERULESCENS) SUBSPECIES FOR CADMIUM AND ZINC RECOVERY |
| 07/14/2004 | CN1511965A Separating column for separating rare earth |
| 07/14/2004 | CN1511964A Process for extracting lithium from salt lake brine by adsorptive method |
| 07/14/2004 | CN1511963A Process for extracting lithium from salt lake brine by manganese dioxide |
| 07/14/2004 | CN1511962A Compound leaching agent and leaching method for leaching out copper pyrite using compound leaching agent |
| 07/14/2004 | CN1157488C Extractant of copper |
| 07/08/2004 | WO2004057043A1 Process for purifying inorganic materials |
| 07/08/2004 | WO2004028655A3 Filter cake treatment method |
| 07/08/2004 | US20040131522 Oxidative leaching of sulfide mineral slurry, circulation stream of leaching liquid; flashing cooling |
| 07/08/2004 | US20040131521 Removable of non-water soluble substances from solutions of aqueous metal extracts |
| 07/08/2004 | US20040131520 Releasing metals; multistage process; preconditioning sulfur with bacteria ; agglomeration of particles; adjust permeability |
| 07/08/2004 | US20040131424 Solvent extraction landfill system and method |
| 07/08/2004 | DE10261705A1 Process to remove heavy metals from contaminated soil by planting or seeding with plants of the Thlapsi variety with Mycorrhiza fungal spores |
| 07/07/2004 | EP1434893A1 Zinc recovery process |
| 07/07/2004 | EP1434892A1 Chloride melt process for the separation and recovery of zinc |