| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 03/27/2003 | US20030057161 Using chelating resins for removing copper; displacing absorbed copper by treating resins with hydrochloric acid or sulfuric acid solutions; waste from iodine recovery by copper mineralization of X-ray contrast agent production solutions |
| 03/27/2003 | US20030057103 Electrowinning cell incorporating metal ion filtration apparatus |
| 03/27/2003 | CA2460116A1 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 03/26/2003 | EP1295953A1 Method for producing platinum material reinforced with dispersed oxide |
| 03/26/2003 | EP1218797B1 Method to extract silver from a photographic developer |
| 03/26/2003 | EP1144699B1 Method for extracting anions of ivb to viii metals using alkyl-substituted 1,3-diaminopropanes |
| 03/26/2003 | EP0981652B1 Sulfide mineral concentrate bioleaching |
| 03/26/2003 | CN1405337A Low-temperature roasting and decomposing process of rare earth heading concentrated sucfuric acid |
| 03/25/2003 | US6537440 Processing copper sulphide ores |
| 03/25/2003 | CA2242010C Method for eluting antimony adsorbed on chelating resin |
| 03/25/2003 | CA2199268C Method for recovering metal and chemical values |
| 03/20/2003 | WO2003023077A1 Zinc recovery process |
| 03/20/2003 | US20030051581 Gold recovery from thiosulfate leaching |
| 03/19/2003 | EP0993510B1 Method for phytomining of nickel, cobalt and other metals from soil |
| 03/19/2003 | CN1404529A Method for upgrading steel plant dust |
| 03/13/2003 | WO2003020990A1 Method of transforming colloidal silver into ionic silver |
| 03/13/2003 | WO2003020647A1 Method of treating heavy-metal-containing wastewater with sulfidizing agent and treatment apparatus |
| 03/13/2003 | WO2002077302A3 Recovery of gold from carbon eluate cyanide solution |
| 03/12/2003 | EP1289637A2 Polysulfonamide matrices |
| 03/12/2003 | EP1289628A2 Acid stable membranes for nanofiltration |
| 03/12/2003 | CN1402368A Recovery of dry cell by leaching process |
| 03/12/2003 | CN1401801A Preparation of active zinc oxide from zinc dross by ultrasonic-microwave process |
| 03/12/2003 | CN1401799A Method for treating earthy cobalt and cobalt-sulfur concentrate by full wet process |
| 03/12/2003 | CN1401798A Method for separating cobalt and zirconium from Co/ZrO2-SiO2 waste catalyst |
| 03/12/2003 | CN1401797A Process for in-situ leaching ion type rareearth ore |
| 03/12/2003 | CN1401769A Sulfide ore leaching bacteria strain protolast fusion technique |
| 03/12/2003 | CN1401763A Zinc sulfide ore leaching bacteria breeding method |
| 03/12/2003 | CN1401762A Method for screening ore leaching bacteria strain using dipyrite |
| 03/11/2003 | US6531241 Anions of equal number to cations to maintain charge neutrality, are disclosed. These spacer groups may be organic or inorganic in origin and may vary in length. The spacer groups may be saturated, containing single bonds, or may have |
| 03/11/2003 | CA2054806C Bio-metallurgical process in which bio-oxidation of mineral compounds is produced |
| 03/06/2003 | WO2003018851A1 Organic reagent cleaning |
| 03/06/2003 | WO2002046483A3 Silver stain removal from dna detection chips by cyanide etching or sonication |
| 03/06/2003 | US20030044335 Using oxidizer |
| 03/06/2003 | US20030041692 Method and apparatus for leaching zinc concentrates |
| 03/05/2003 | CN1400322A Method for separating platinum palladium iraurita |
| 03/05/2003 | CN1400321A Zinc sulfide preparation concentrate compression leaching method |
| 02/27/2003 | US20030037847 High purity tantalum, products containing the same, and methods of making the same |
| 02/26/2003 | EP1124998B1 Method for the production of a high-purity concentrated magnesium chloride solution by acid leaching and neutralization |
| 02/26/2003 | EP1012352B1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide or laterite ores |
| 02/26/2003 | CN1398994A Supersonic pre-treatment process of refractory gold ore containing As.S. etc. |
| 02/26/2003 | CN1102175C Method of recovering copper and zine oxide from waste copper-zine catalyst |
| 02/25/2003 | US6524367 Ammonia and ammonium carbonate solution |
| 02/20/2003 | WO2003014422A1 Improvements in solvent extraction processes for metal recovery |
| 02/20/2003 | WO2003014273A1 A process for reducing the passive layer from the surface of a metal |
| 02/20/2003 | US20030034301 Anaerobic processes; biooxidation |
| 02/20/2003 | US20030033906 Chlorine leaching; oxidation pressure leaching |
| 02/19/2003 | CN1397653A Process for enriching and preparing high-purity scandium by use of oxyl substituted acetic acid as extractant |
| 02/19/2003 | CN1101858C Method of extracting Cu, Zn, Cd from cobalt solution |
| 02/18/2003 | CA2214611C Method for processing zinc silicate-containing zinc crude material |
| 02/13/2003 | WO2003012018A1 Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| 02/13/2003 | WO2003012017A1 Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| 02/13/2003 | US20030032572 Process for reducing the passive layer from the surface of a metal |
| 02/13/2003 | US20030031614 Forming an aqueous slurry of molybdenite concentrates; heating slurry; agitating slurry while in contact with oxygen under pressure; regulating amount of ferric iron concentration and excess sulfuric acid concentration during oxidation reaction |
| 02/13/2003 | US20030031611 Production of zinc oxide from acid soluble ore using precipitation method |
| 02/13/2003 | US20030029804 Composition for removing metal ions from aqueous process solutions and methods of use threrof |
| 02/13/2003 | US20030029801 For recovering metals from aqueous waste solutions |
| 02/13/2003 | CA2455351A1 Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| 02/12/2003 | EP1133501B1 Calixarene derivatives |
| 02/12/2003 | CN1396962A Process for refining silver bullion with gold separation |
| 02/12/2003 | CN1396280A Extractant of copper |
| 02/12/2003 | CN1396279A Process for preparing red copper powder from crude copper ore |
| 02/12/2003 | CN1396119A Process for comprehensive utilization of waste acid containing titanium oxide |
| 02/12/2003 | CN1101476C Process for producing high-purity lutetium oxide by extracting separation method |
| 02/12/2003 | CN1101475C Method for reextracting cobalt |
| 02/11/2003 | US6517701 Sequential solvent extraction steps; substituted monothiophosphinic acids |
| 02/10/2003 | CA2396972A1 Processing of nickel bearing solutions |
| 02/08/2003 | CA2397251A1 Methods for detecting and extracting gold |
| 02/06/2003 | WO2003010346A2 Wet process and reactor for the recovery of platinum group metals from automobile catalytic converters |
| 02/06/2003 | WO2003010345A1 Method for improving metals recovery using high temperature pressure leaching |
| 02/06/2003 | WO2003010295A1 Adaptation of bacteria for use in leaching |
| 02/06/2003 | US20030026749 Purification for electrolytic cell |
| 02/06/2003 | US20030024353 Gelatin encapsulated metal powder for silver recovery from processing solutions |
| 02/06/2003 | CA2454812A1 Method for improving metals recovery using high temperature pressure leaching |
| 02/06/2003 | CA2454678A1 Adaptation of bacteria for use in leaching |
| 02/05/2003 | EP1281779A2 Selective metal leaching process |
| 02/05/2003 | EP1280941A1 Method for eliminating nickel ions and lead ions from ferrous salt solutions |
| 02/05/2003 | EP1038041B1 A fibrous system including wicking fibers impregnated with extractant for continuously capturing metals from an aqueous stream |
| 02/05/2003 | EP0946300B1 Process for the RECOVERY OF CO/MN FROM ASH |
| 02/05/2003 | CN1394972A Process for separating high-purity yttrium by using oxyl substituted acetic acid as extracting agent |
| 02/05/2003 | CN1394971A Process for extracting and separating thorium and extracting rare earth chloride from sulfuric and phosphoric mixed acid system |
| 02/04/2003 | US6514414 Process for separation and removal of iron ions from basic zinc solution |
| 02/03/2003 | CA2396665A1 Selective metal leaching process |
| 01/30/2003 | US20030019330 Method for improving metals recovery using high temperature pressure leaching |
| 01/29/2003 | EP1278605A1 Materials and method for the biological production of sulfuric acid |
| 01/28/2003 | US6511639 Lithium/transition-metal mixed oxide compounds from spent lithium batteries can be resynthesized after solvent extraction, grinding, and heat treatment |
| 01/28/2003 | US6511603 Alkaline earth cation extraction from acid solution |
| 01/23/2003 | WO2003006696A1 Heap bioleaching process for the extraction of zinc |
| 01/23/2003 | WO2003006695A1 Hydrometallurgy method for leaching oxidised ores and metal recovery |
| 01/23/2003 | WO2003006694A1 Process for passivating sulfidic iron-containing rock |
| 01/23/2003 | WO2002072899A3 Method for recovering zirconium values from a hard rock ore containing zircon and uranium |
| 01/23/2003 | US20030017106 Recovery of natural nanoclusters and the nanoclusters isolated thereby |
| 01/23/2003 | US20030015065 Recovery of precious metals from thiosulfate solutions |
| 01/23/2003 | CA2452496A1 Process for passivating sulfidic iron-containing rock |
| 01/22/2003 | CN1392902A Recovery of nickel and cobalt values from sulfidic flotation concentrate by chloride assisted oxidative pressure leaching in sulfuric acid |
| 01/22/2003 | CN1392274A Liquid film and process for extracting gold from poor gold liquid and waste gold liquid |
| 01/21/2003 | US6508993 Steam heating in aqueous concentrated nonacid oxidizer such as sodium chlorate containing solid sodium chloride then adding hydrochloric acid at rate sufficient to prevent outgassing of hydrogen |
| 01/16/2003 | US20030013166 Biological extraction of metals from soils; obtain soil, insert into bioreactor, expose to bacteria, bioxidize sample, recover metal |
| 01/16/2003 | US20030012716 Solvent extraction using an organic solution of an oxine i.e. an 8-hydroxy quinoline and substituted 8-hydroxy quinoline that may be alkyl or alkylene-substituted. |
| 01/16/2003 | US20030010156 Method for upgrading steel plant dust |
| 01/15/2003 | CN1098933C Reinforced alkaline-leachin gold-xtracting technology for arsenic-containing sulphur-containing difficult-to-extract gold ore |