| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 12/16/1997 | US5698170 Leaching copper-containing material with acidic liquid, diluting copper-containing solution to reduce acid content, solvent extracting copper from diluted solution |
| 12/16/1997 | US5698169 Methods and agents for the extraction of cesium and strontium from nuclear waste |
| 12/11/1997 | WO1997046722A1 Recovery of iron products from waste material streams |
| 12/11/1997 | CA2257910A1 Recovery of iron products from waste material streams |
| 12/10/1997 | CN1167507A Use of a solvent impregnated crosslinked matrix for metal recovery |
| 12/10/1997 | CN1167085A Production of titanium oxide |
| 12/09/1997 | US5695882 Reaction product of polyamine with short chain hydrocarbylsilane bonded to hydrated surface of extraction material |
| 12/03/1997 | EP0809714A1 Modifiers for aldoxime extractant of metal values |
| 12/03/1997 | EP0809628A1 Amphiphilic compounds with at least two hydrophilic and at least two hydrophobic groups based on dicarboxylic acid diamides |
| 11/27/1997 | WO1997044500A1 Treatment of fly ash/apc residues including lead salt recovery |
| 11/27/1997 | WO1997044499A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 11/27/1997 | CA2253644A1 Treatment of fly ash/apc residues including lead salt recovery |
| 11/27/1997 | CA2252849A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 11/26/1997 | EP0808910A2 Apparatus and method for the generation and use of ferric ions produced by bacteria |
| 11/26/1997 | EP0808377A1 Treatment of titanium-containing material |
| 11/26/1997 | CN1166186A Proces sof rmaking copper metal powder, copper oxides and copper foil |
| 11/25/1997 | US5691211 Method for gettering noble metals from mineral acid solution |
| 11/25/1997 | US5690718 Low energy process for recovering lead dioxide and lead monoxide which can be used in new battery manufacture |
| 11/25/1997 | CA2025165C Removal of molybdenum from uranium-bearing solutions |
| 11/21/1997 | CA2205151A1 Apparatus and method for the generation and use of ferric ions |
| 11/20/1997 | WO1997043023A1 Process for the recovery of nickel |
| 11/20/1997 | DE19619228A1 Removing antimony from hydrofluoric acid solutions |
| 11/19/1997 | EP0807188A1 Hydrometallurgical processing of flue dust |
| 11/18/1997 | US5688304 Method for improving the heap biooxidation rate of refractory sulfide ore particles that are biooxidized using recycled bioleachate solution |
| 11/18/1997 | CA2047728C Process for recovering germanium |
| 11/13/1997 | WO1997041938A1 Method and apparatus for conducting the two solutions of liquid-liquid extraction, mixed into dispersion, in a controlled fashion into the separation part |
| 11/13/1997 | CA2254080A1 Method and apparatus for conducting the two solutions of liquid-liquid extraction, mixed into dispersion, in a controlled fashion into the separation part |
| 11/12/1997 | EP0806487A1 Extraction of antimony from sulfide ores by alkaline leaching, recovery of elemental sulfur and electrowinning antimony from fluoborate solution |
| 11/12/1997 | EP0806059A1 Process for recovery of metals from used nickel-metal hydride accumulators |
| 11/12/1997 | CN1164830A Process for separating cesium from industrial streams containing other alkali metals using poly(hydroxyarylene) polymeric resins |
| 11/06/1997 | WO1997041168A1 Integral multi-layered ion-exchange composite membranes |
| 11/06/1997 | WO1997040901A1 Method and apparatus for adjusting the boundary surface between two controllably flowing and mutually separable solutions and for conducting both solutions out of the separation part |
| 11/06/1997 | WO1997040900A1 Method and apparatus for recirculating a heavier solution from the separation part of two separable solutions into a mixing unit |
| 11/06/1997 | CA2204463A1 Process for hydrometallurgic and electrochemical treatment of sulfur antimony ores with production of electrolytic antimony and elemental sulfur |
| 11/05/1997 | EP0804624A1 Chloride assisted hydrometallurgical copper extraction |
| 11/05/1997 | EP0571467B1 Mineral recovery apparatus |
| 11/04/1997 | US5683490 Solution mining of precious metals using aqueous, sulfur-bearing solutions at elevated temperatures |
| 11/04/1997 | US5683488 Method for producing an iron feedstock from industrial furnace waste streams |
| 10/29/1997 | EP0802884A1 Recovery of chemical values from industrial wastes |
| 10/29/1997 | EP0619764B1 Process for removing heavy metals from soils |
| 10/29/1997 | CN1163314A Technical process for extracting valuable metal from gold slime |
| 10/29/1997 | CN1036283C Recovering method for noble metal |
| 10/28/1997 | US5682593 Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate |
| 10/23/1997 | WO1997038771A1 Process for making shaped copper articles |
| 10/21/1997 | US5679259 Method for recovering metals from solutions |
| 10/16/1997 | WO1997038143A1 Method for lowering the oxygen content in valve metal materials |
| 10/15/1997 | EP0801030A2 Production of titanium oxide |
| 10/15/1997 | EP0800710A1 Process for recovery of metals from used nickel-metal hydride accumulators |
| 10/15/1997 | CN1162340A Recovery of zinc from sulphidic concentrates |
| 10/15/1997 | CN1162021A Aluminium-sodium composite lithium salt and application thereof |
| 10/14/1997 | US5678242 Contacting aqueous solution of metal ions with one side of porous membrane having organic soluble complexing agent in pores to extract metal ions, contacting other side with aqueous solution of second complexing agent to remove |
| 10/14/1997 | US5676817 Three stage purification; ph reduction, anion exchange and membrane electrolysis |
| 10/14/1997 | US5676733 Separation of clay and fines; forming concentrate; leaching; oxidation of iron sufide; hydrometallurgy |
| 10/09/1997 | WO1997036823A1 Method for recovering sodium from alkaline industrial waste |
| 10/09/1997 | DE19613280A1 Separating species of metal ions |
| 10/08/1997 | EP0698127B1 Recovery of metals from sulphidic material |
| 10/08/1997 | EP0686205B1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 10/02/1997 | WO1997036014A1 METHOD FOR SOLUBILIZING METAL VALUES FROM Ta-Nb-ORE MATERIALS CONTAINING INSOLUBLE FLUORIDES |
| 10/02/1997 | WO1997036013A1 Recovery of metal values from solids by digestion in sulfuric acid medium including a reductant |
| 10/02/1997 | WO1997036011A1 Recovery of metal values |
| 10/02/1997 | WO1997035945A2 Process for removal of organo-sulfur compounds from liquid hydrocarbons |
| 10/02/1997 | CA2254726A1 Process for removal of organo-sulfur compounds from liquid hydrocarbons |
| 09/30/1997 | US5672194 Method and apparatus for extracting precious metals from their ores and the product thereof |
| 09/24/1997 | CN1160020A Process for direct production of cupric sulfate from cupric oxide ore |
| 09/23/1997 | US5670035 Solvent extraction, stripping, electrowinning |
| 09/23/1997 | US5670033 Process for making copper metal powder, copper oxides and copper foil |
| 09/17/1997 | EP0795046A1 Process for making copper metal powder, copper oxides and copper foil |
| 09/17/1997 | EP0795039A1 Use of a solvent impregnated crosslinked matrix for metal recovery |
| 09/17/1997 | EP0795036A1 Method for producing iron feedstock |
| 09/17/1997 | CN1035888C Process for the recovery of noble metals and tertals and tertiary phosphines |
| 09/16/1997 | US5668219 Cationic block polymer agglomeration agents for mineral bearing ores |
| 09/16/1997 | US5667555 Method for the removal of calcium by products during the production of an iron feedstock |
| 09/16/1997 | US5667076 Gold retrieving pan |
| 09/12/1997 | WO1997033007A1 Process for recovery of zinc from sphalerite containing ores or concentrates |
| 09/09/1997 | US5666642 Extraction of cesium and strontium ions from nuclear waste |
| 09/09/1997 | US5665243 Method for removing metal contained in solution using surfactant having chelating ability |
| 09/04/1997 | WO1997031860A1 Separation of calcium from metal compounds |
| 09/03/1997 | EP0792247A1 Metal and fluorine values recovery from mineral ore treatment |
| 09/02/1997 | US5662871 Method for extracting metals from large solution flows and apparatus for realizing the same |
| 09/02/1997 | US5662861 Liquid extraction |
| 08/28/1997 | WO1997030811A1 Process for the reductive precipitation of noble metal submicron powder |
| 08/28/1997 | DE19606390A1 Verfahren zur Herstellung von Edelmetall-Submikronpulver Process for the preparation of precious metal-submicron powder |
| 08/27/1997 | EP0764042A4 Fluid extraction |
| 08/27/1997 | CN1157856A Leaching extraction electrodeposition method for processing cupric oxide ore |
| 08/26/1997 | US5660806 Deleading by leaching, dissolving in hydrochloric acid or sulfuric acid and a salt of alkali metal, alkaline earth metal or ammonium, recovering from liquid phase |
| 08/26/1997 | CA2044731C Method for extraction of valuable minerals and precious metals from oil sands ore bodies and other related ore bodies |
| 08/21/1997 | WO1997030377A1 Regeneration of spent fixer solution |
| 08/21/1997 | WO1997030181A1 Extraction of cobalt and/or nickel from an aqueous feed solution |
| 08/20/1997 | EP0789784A1 Process for decomposing and recovering the metal components from superalloys |
| 08/20/1997 | EP0789608A1 Processes for separating cesium from industrial streams containing other alkali metals using poly(hydroxyarylene) polymeric resins |
| 08/20/1997 | CN1035683C Method for extracting gold and silver by using thiourea |
| 08/14/1997 | WO1997029215A1 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions |
| 08/14/1997 | DE19605289A1 Production of copper from cleaned ore concentrates |
| 08/14/1997 | CA2243552A1 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions |
| 08/13/1997 | EP0788394A1 Process for the treatment of contaminated material |
| 08/13/1997 | CN1157009A Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 08/12/1997 | US5656702 Water pollution control |
| 08/06/1997 | EP0787044A1 Polymerized phospholipid membrane mediated synthesis of metal nanoparticles |
| 08/06/1997 | EP0610176B1 Degradation of ferric chelates by a pure culture of agrobacterium sp. |
| 08/06/1997 | CN1035559C Recovering method for gold from tailing pulp |