| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 06/21/2001 | DE19960132A1 Verfahren zur Gewinnung von Kupfer und anderen Metallen A process for recovering copper and other metals |
| 06/21/2001 | CA2389504A1 Sulphidisation of sulphide ores for hydrometallurgical extraction of copper and other metals |
| 06/19/2001 | US6248302 Digestion, heating, dissolving water soluble salts, separation |
| 06/14/2001 | WO2001042520A1 Method of high-temperature digesting titanium containing material with sulfuric acid |
| 06/14/2001 | WO2001042519A1 Recovery of precious metals |
| 06/14/2001 | WO2001042518A1 Method of digesting metal containing material at elevated temperature in the presence of sulphur oxide compound source such as h2s04 |
| 06/14/2001 | CA2393769A1 Recovery of precious metals |
| 06/12/2001 | US6245240 Contaminated with soluble manganese salt comprising adding an oxidising agent to convert salt to manganese dioxide, addition of manganese dioxide as seeding agent, seed particles are produced by reacting ferrous sulphate and potassiumm, iron |
| 06/12/2001 | US6245125 Biologically oxidation of the concentrate ; solid/liquid separation; solvent extraction to produce a raffinate; stripping the solvent extraction reagent; electrowinning copper; recovering cobalt; recovering nickel |
| 06/07/2001 | WO2001040551A1 Method of electrochemical in situ disposal of metal structures |
| 06/06/2001 | CN1298030A Rear earth liquid-liquid separating method |
| 06/06/2001 | CN1298029A Integral equipment and technological process of adsorption, desorption and electrolysis of gold leachate |
| 06/05/2001 | US6241800 Acid fluxes for metal reclamation from contaminated solids |
| 06/05/2001 | CA2191227C Fluid extraction of metals and/or metalloids |
| 06/05/2001 | CA2081767C Formulations for iron oxides dissolution |
| 05/31/2001 | WO2001038590A2 Solvent extraction process for the recovery of valuable metals from acidic leachates |
| 05/31/2001 | WO2001018262A3 Bioleaching of sulphide minerals |
| 05/31/2001 | US20010002312 Regenerating a raffinate solution by passing through a reactor cell having openings for entry and exit of solution, having coated packing material colonized such as with Thiobacillus; reactivation of chemical leach solutions |
| 05/31/2001 | CA2391394A1 Solvent extraction process for the recovery of valuable metals from acidic leachates |
| 05/30/2001 | CN2432223Y Strong-base soaking pretreatment stirring tank for arsenic-containing hard-processing gold ore |
| 05/30/2001 | CN1297067A Solvent extraction process for purifying copper electrolysis solution |
| 05/29/2001 | US6238632 Process and composition for removing precious metals from activated carbon |
| 05/29/2001 | US6238566 Multi-stage solvent extraction of metal value |
| 05/25/2001 | WO2001036693A2 Recovery of metals from ore by bioleaching with sulfur addition |
| 05/24/2001 | US20010001650 Recovery of nickel and cobalt from ore |
| 05/23/2001 | EP1101829A1 The recovery of gold from refractory ores and concentrates of such ores by cyanide leaching |
| 05/23/2001 | DE19955881A1 Process for the recovery of valuable metals from an acidic aqueous leaching solution comprises liquid/liquid extraction of the solution by contacting the solution once with an organic water insoluble extractant |
| 05/23/2001 | CN1066215C Preparation of modified active carbon fiber and method for extracting silver of reduction adsorption by same |
| 05/23/2001 | CN1066203C Process for recovery of zinc from sphalerite containing ores or concentrates |
| 05/17/2001 | WO2001034859A1 Method for reduction of nickel |
| 05/17/2001 | WO2001034857A1 A method for the reduction of nickel from an aqueous solution |
| 05/17/2001 | WO2001034856A1 Recovery of metal values from aqueous solutions and slurries |
| 05/17/2001 | CA2389658A1 Recovery of metal values from aqueous solutions and slurries |
| 05/16/2001 | EP1099010A2 Method for recovering precious metals |
| 05/15/2001 | US6231823 Solvent extraction process for the separation of cobalt from nickel in aqueous sulphate-containing solutions |
| 05/15/2001 | US6231784 Water insoluble composition of an aldoxime extractant and an equilibrium modifier |
| 05/10/2001 | WO2001032944A1 Method for leaching nickeliferous oxide ores of high and low magnesium laterites |
| 05/10/2001 | WO2001032943A2 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 05/10/2001 | US20010001065 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 05/10/2001 | CA2389653A1 Method for leaching nickeliferous laterite ores |
| 05/10/2001 | CA2389635A1 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 05/09/2001 | EP1097247A1 A method for isolation and production of magnesium metal, magnesium chloride, magnesite and magnesium based products |
| 05/09/2001 | EP0850322B1 Selective separation of dissolved metal species with substituted 1,3,5 triazine extractants |
| 05/08/2001 | US6228335 Process for the production of sodium carbonate crystals |
| 05/03/2001 | WO2001031072A1 A method of operating a bioleach process with control of redox potential |
| 05/03/2001 | DE10000275C1 Process for removing ruthenium from precious metal solutions comprises adding chlorate to a ruthenium-containing solution and feeding a carrier gas through the suspension/solution to collect the ruthenium tetroxide produced |
| 05/03/2001 | DE10000274C1 Process for recovering osmium and ruthenium from precious metal concentrates comprises collecting osmium tetroxide in an absorption solution and leaching out ruthenium with an agent |
| 05/02/2001 | CN1293260A Process for recovering Co and Mn catalyst from oxidized dregs of terephthalic acid |
| 05/02/2001 | CN1293259A Rocovery of copper and mickel |
| 05/01/2001 | CA2156295C Process for the treatment of electric arc furnace dust |
| 05/01/2001 | CA2011855C Process of treating metal chloride wastes |
| 04/26/2001 | WO2001029276A1 Resin-in-pulp method for recovery of nickel and cobalt from oxidic ore leach slurry |
| 04/26/2001 | WO2001028934A1 Process for reducing the concentration of dissolved metals and metalloids in an aqueous solution |
| 04/26/2001 | CA2387834A1 Resin-in-pulp method for recovery of nickel and cobalt from oxidic ore leach slurry |
| 04/25/2001 | EP0840808B1 Method of purifying gold |
| 04/25/2001 | EP0832303B1 Chloride assisted hydrometallurgical extraction of metal |
| 04/25/2001 | EP0710297B1 Method of extracting fluorine from minerals or mineral species |
| 04/24/2001 | US6221128 Recovery and removal of mercury from effluent |
| 04/19/2001 | WO2001026833A1 Process and apparatus for recovering heavy metals from contaminated materials |
| 04/18/2001 | CN1064715C Process for extracting metals directly from metal oxides |
| 04/17/2001 | US6216962 Method and apparatus for distributing fluid to a leach field surface |
| 04/12/2001 | WO2001025497A1 Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 04/11/2001 | EP1090695A1 Process and apparatus for recovering heavy metals from contaminated materials |
| 04/11/2001 | EP1090153A1 Tantalum sputtering target and method of manufacture |
| 04/11/2001 | EP1090151A1 Process for separation of heavy metals from residues by use of of ethylenediamine-disuccinic acid (edds) complexant |
| 04/11/2001 | EP1090150A1 Mineral collector compositions of fatty hydroxamic acid in admixture with an oil and process of making same |
| 04/10/2001 | US6214301 Hafnium radioisotope recovery from irradiated tantalum |
| 04/10/2001 | US6214234 Using aqueous solution of hexacyanoferrate salt |
| 04/10/2001 | US6214088 Immobilized bioreactor method for sulphidic minerals and other particulate solids |
| 04/10/2001 | CA2204858C Process for making copper metal powder, copper oxides and copper foil |
| 04/10/2001 | CA2070200C Nickel processing |
| 04/05/2001 | WO2001023627A1 Process to selectively recover metals from waste dusts, sludges and ores |
| 04/05/2001 | WO2001023626A1 The elution of gold from anion exchange resins |
| 04/05/2001 | WO2001023067A1 Polyamide-containing ligands covalently bonded to supports, polyamide-containing resins, and methods for removing metals from solutions |
| 04/05/2001 | CA2384631A1 Polyamide-containing ligands covalently bonded to supports, polyamide-containing resins, and methods for removing metals from solutions |
| 04/04/2001 | CN1064087C Process for removing cobalt with antimony salts at low temperature for smelting zinc by wet process |
| 04/03/2001 | US6210647 Process of recovery of metals from aqueous ammoniacal solutions employing an ammonia antagonist having only hydrogen bond acceptor properties |
| 04/03/2001 | CA2055484C Process for two-phase extraction of metallic ions from phases containing solid metallic oxides, agent and use |
| 03/29/2001 | WO2001021846A1 Recovery of metallic lead and salt value from lead ores or from spent lead-acid storage batteries with acetic acid lixiviant |
| 03/29/2001 | DE19946326A1 Recycling colored metals from the slag of copper winning comprises reacting the granulated slag with semi-concentrated sulfuric acid, roasting the cake produced and treating with alkali |
| 03/28/2001 | EP1086256A1 Treatment of roasted metal sulphide ores and ferrites by leaching with peroxysulphuric acid |
| 03/28/2001 | EP0862658B1 A method for the treatment of bismuth-containing sulphide ores or concentrates of such ore |
| 03/28/2001 | CN1288964A Preparation of high-purity chloro-osmate solution |
| 03/28/2001 | CN1288963A Technology process of extracting copper from copper oxide ore |
| 03/27/2001 | US6207443 Method for initiating heap bioleaching of sulfidic ores |
| 03/27/2001 | US6207126 Adding calcium oxide or hydroxide to preciptate magnesium and calcium; filtering; adding oxalic acid to preciptate calcium oxalate; adding barium to precipitate barium sulfate; adjusting to ph 7 to precipitate a sodium-free lithium |
| 03/27/2001 | US6206951 Pressure leaching using copper sulfate; heating |
| 03/21/2001 | EP1084280A1 Hydrometallurgical treatment process for extraction of platinum group metals obviating the matte smelting process |
| 03/21/2001 | CN1288069A Art for prodn. of high purity yttrium by liquid-liquid extraction separation |
| 03/21/2001 | CA2282884A1 Decontamination method for treatment residues |
| 03/15/2001 | WO2001018602A1 Method to extract silver from a photographic developer |
| 03/15/2001 | WO2001018270A1 Recovery of nickel and copper from sulphide concentrates by bioleaching |
| 03/15/2001 | WO2001018269A1 Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed |
| 03/15/2001 | WO2001018268A1 Recovery of nickel from nickel bearing sulphide minerals by bioleaching |
| 03/15/2001 | WO2001018267A1 Recovery of precious metal from sulphide minerals by bioleaching |
| 03/15/2001 | WO2001018266A1 Recovery of zinc from zinc bearing sulphide minerals by bioleaching and electrowinning |
| 03/15/2001 | WO2001018265A1 Method and device for continuous treatment of copper sulphide containing ore by biological leaching |
| 03/15/2001 | WO2001018264A1 Improved bacterial oxidation of sulphide ores and concentrates |
| 03/15/2001 | WO2001018263A1 Method and apparatus for achieving enhanced oxygen mass transfer in slurry systems |
| 03/15/2001 | WO2001018262A2 Bioleaching of sulphide minerals |