| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 05/03/1988 | CA1235908A1 Process for the isolation of noble metals |
| 05/03/1988 | CA1235907A1 Recovery of gold from refractory auriferous iron- containing sulphidic concentrates |
| 05/03/1988 | CA1235906A1 Process for separating antimony from columbium solutions |
| 04/27/1988 | EP0265356A1 Extraction of gallium from Bayer solutions using an impregnated adsorbing resin |
| 04/26/1988 | US4740243 Metal value recovery from metal sulfide containing ores |
| 04/26/1988 | US4739973 Chemical extraction of metals from ores |
| 04/19/1988 | US4739054 For metals |
| 04/13/1988 | EP0263694A2 Process for removing radioactive ruthenium from aqueous solution |
| 04/13/1988 | EP0263539A1 Process for treating zinc hydrometallurgy residues |
| 04/13/1988 | EP0263411A2 Process for reducing the iron content of aluminate liquors in the Bayer process |
| 04/12/1988 | US4737350 Process for separating arsenic from acid solutions which contain it |
| 04/12/1988 | CA1234991A1 Recovery of gold from auriferous refractory iron- containing sulphidic ore |
| 04/07/1988 | WO1988002408A1 Method of concentration of difficult-to-concentrate oxidized copper ore |
| 04/07/1988 | DE3633864A1 Process and apparatus for extracting metals from waste waters |
| 04/06/1988 | CN86106797A Pressure elution process of ion type re crude ore and its apparatus |
| 03/22/1988 | US4732681 Biomass of cladosporium, cultures |
| 03/22/1988 | US4732608 Method for biological processing of metal-containing ores |
| 03/15/1988 | US4731187 Removal of heavy metals from waste water |
| 03/08/1988 | US4729788 Bioleaching, oxidation, mineral sulfides |
| 03/08/1988 | CA1233645A1 Process for recovering gallium using substituted hydroxyquinolines and organophosphorus compounds |
| 03/03/1988 | DE3711801C1 Process for separating off and purifying the platinum group metals by precipitation |
| 03/03/1988 | DE3711800C1 Process for separating off and purifying the platinum group metals by solvent extraction |
| 03/02/1988 | EP0258013A2 Method for distributing an aqueous solution containing a peroxygen in clay |
| 03/02/1988 | CN86105223A Hydrometallurgy of extracting spongy tin and tin salts from medium tin ore |
| 03/02/1988 | CN86103750A Acid leaching carbonization for separating lead and tin and mfg. industrial chemicals |
| 03/01/1988 | US4728728 Metal complexing agents |
| 03/01/1988 | US4728427 Water pollution control |
| 03/01/1988 | US4728082 Apparatus for biological processing of metal containing ores |
| 03/01/1988 | CA1233472A1 Extraction of metal values |
| 02/23/1988 | US4726938 Liquid/liquid extraction/purification of impure solutions of rare earth values |
| 02/23/1988 | US4726841 Solvent extraction using an secondary amide |
| 02/23/1988 | CA1233028A1 Process for recovering silver from sulfate solutions |
| 02/23/1988 | CA1233025A1 Separation of rare earths by means of liquid-liquid extraction |
| 02/16/1988 | US4725311 Reduction by magnesium in inert organic solvents |
| 02/16/1988 | CA1232763A1 Method of liquid-liquid extraction of gallium from a basic aqueous solution |
| 02/11/1988 | DE3706736C1 Process for removing iron and/or transition metal impurities from aqueous aluminium salt solutions |
| 02/10/1988 | EP0255673A2 Process for the recovery of rhodium from aqueous solutions containing rhodium complex compounds |
| 02/09/1988 | US4724129 Method of recovering gallium from very basic solutions by liquid/liquid extraction |
| 02/02/1988 | US4722831 Leaching with hydrochloric acid, leaving gold in residues |
| 02/02/1988 | CA1232142A1 Leaching and washing a flocculated slurry having a fiber content |
| 02/02/1988 | CA1232138A1 Removal of radium from aqueous liquids |
| 01/28/1988 | EP0236480A4 Production of hydrogen by deserpentinization of ultramafic rock. |
| 01/26/1988 | US4721606 Recovery of metal values from spent catalysts |
| 01/26/1988 | US4721605 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 01/20/1988 | EP0253783A1 Process for refining gold and apparatus employed therefor |
| 01/19/1988 | CA1231536A1 Hydrometallurgical method for treating valuable metal raw materials containing chlorides and fluorides |
| 01/14/1988 | WO1988000249A1 Tungsten extraction from ore |
| 01/14/1988 | WO1988000248A1 Separation process |
| 01/12/1988 | US4718996 Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material |
| 01/12/1988 | US4718995 Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material |
| 01/07/1988 | EP0251399A1 Process for separating or recovering plutonium, and plutonium obtained thereby |
| 01/07/1988 | EP0250666A1 Process for selective dialysis using polymeric affinity adsorbents and size selective membranes |
| 01/05/1988 | USH404 Disposal of inorganic chemical wastes |
| 01/05/1988 | US4717550 Red mud, bayer process, tertiary polyamine, iron removal |
| 01/05/1988 | CA1230977A1 Process for separating and purifying metals of the platinum group (i) |
| 01/05/1988 | CA1230976A1 Process for producing and purifying metals of the platinum metals (ii) |
| 12/30/1987 | CN87104300A Production of high purity zirconia from zirconiferous materials |
| 12/29/1987 | US4716114 Procedure for the enhancement of the resistance to arsenite and arsenate of Thiobacillus ferrooxidans and Bacillus subtilis |
| 12/29/1987 | CA1230742A1 Global extraction process of uranium, ittryum, thorium and rare earths from an organic medium |
| 12/29/1987 | CA1230734A1 Process for reclamation of high purity selenium from scrap alloys |
| 12/23/1987 | EP0250342A1 Process for recovering aluminium and lithium from metallic scrap |
| 12/15/1987 | US4713110 Reducing salts with magnesium and catalyst |
| 12/15/1987 | CA1230310A1 Dissolution of puo.sub.2 or npo.sub.2 using electrolytically regenerated reagents |
| 12/09/1987 | EP0248518A1 Separation of nickel from copper in autoclave |
| 12/08/1987 | US4711863 Immobilized extractants |
| 12/08/1987 | US4711718 Removable cartridge containing halogen or nitrogen oxide substituted catechol siderophore for chelating lead copper ions |
| 11/25/1987 | EP0246677A1 Process for removing mercury from arsenic-containing residual sulfuric acid solutions |
| 11/24/1987 | CA1229489A1 Process for separating and purifying metallic elements by displacement chromatography |
| 11/11/1987 | EP0245122A2 Process for the purification of a barium salt |
| 11/11/1987 | EP0244894A1 Process for the production of akali metals |
| 11/11/1987 | EP0244433A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 11/10/1987 | US4705896 Novel extractants for the recovery of palladium |
| 11/10/1987 | US4705671 Apparatus for reducing iron and vanadium in phosphoric acid solution |
| 11/03/1987 | US4704260 Lead removal method |
| 11/03/1987 | CA1228735A1 Hydrometallurgical method of extraction of copper from sulphide-containing material |
| 11/03/1987 | CA1228734A1 Process for the separation of arsenic from acid solutions containing it |
| 10/27/1987 | CA1228483A1 Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material |
| 10/22/1987 | WO1987006271A1 Leaching and adsorption of a precious metal |
| 10/22/1987 | DE3612553A1 Method for processing domestic and industrial wastes to form recycled products |
| 10/20/1987 | US4701311 Extraction with polyhydroxybenzenes in organic diluents |
| 10/20/1987 | US4701308 Oxidation, then extraction with hydroxamic acid |
| 10/20/1987 | US4701261 Contacting with cellular particles to form water-insoluble salts |
| 10/14/1987 | EP0241278A2 Method of separating and purifying tantalum and niobium-containing compounds |
| 10/13/1987 | US4699997 Colorimetric detectors |
| 10/13/1987 | US4699725 Deicers |
| 10/06/1987 | US4698425 Chelating agents |
| 10/06/1987 | US4698162 Method for prevention of metallic precipitate reoxidation/redissolution in aqueous systems |
| 10/06/1987 | US4698139 Hydrometallurgical method for treating valuable metal raw materials containing chlorides and fluorides |
| 09/30/1987 | EP0192651A4 1,3 disubstituted aromatic cyclohexane imides and method of use thereof as chelating agents. |
| 09/30/1987 | CN87100989A Method for purifying barium ester |
| 09/29/1987 | US4696801 Process for the extraction of metal values with bisimidazole metal extractants |
| 09/29/1987 | CA1227340A1 Separation of lead from other metals |
| 09/29/1987 | CA1227339A1 Process for metal recovery by solvent extraction from caso.sub.4 containing sulfate solutions |
| 09/29/1987 | CA1227336A1 Metal recovery process |
| 09/29/1987 | CA1227321A1 Recovery of anhydrous zinc chloride |
| 09/23/1987 | EP0238402A1 Process for separating rare earths |
| 09/16/1987 | EP0236542A2 Novel organic phosphinic acid compounds |
| 09/16/1987 | EP0236480A1 Production of hydrogen by deserpentinization of ultramafic rock. |
| 09/16/1987 | EP0236466A1 Process for extracting zinc from silicate zinc ores |
| 09/16/1987 | EP0236306A1 Removal of inorganic contaminants from catalysts |