| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 06/15/1989 | WO1989005341A1 Microorganism for use in industrial processes |
| 06/15/1989 | WO1989005279A1 Process for separating antimony from acidic solutions containing same |
| 06/15/1989 | DE3740680A1 Process for leaching metals from sludge, mud, ores and industrial waste |
| 06/14/1989 | CN1033396A Complex decomposition ore dressing method for copper-oxide ore |
| 06/06/1989 | US4836956 Extraction of polyvalent metals with organodiphosphonic acids |
| 06/01/1989 | WO1989004878A1 Process for hydrometallurgical treatment of a solution of galliferous substances |
| 06/01/1989 | WO1989004877A1 Process for hydrometallurgical treatment of an indium chloride solution |
| 06/01/1989 | WO1989004736A1 Process for producing particulate metal powder |
| 05/31/1989 | EP0318384A1 Hydrometallurgical treatment of indium chloride-containing solutions |
| 05/31/1989 | EP0318383A1 Hydrometallurgical treatment of gallium-containing solutions |
| 05/31/1989 | CN2038500U Vortex shape electric heater for digesting rare-earth concentrate ore with soda |
| 05/30/1989 | US4835107 Method for the concentration and separation of actinides from biological and environmental samples |
| 05/30/1989 | US4834952 Liquid extraction using carboxylic acid, phosphonic acid ester, or hydroxyquinoline |
| 05/30/1989 | US4834951 Common separation of contaminating elements from electrolyte solutions of valuable metals |
| 05/30/1989 | US4834793 Oxidation process for releasing metal values in which nitric acid is regenerated in situ |
| 05/24/1989 | CN1033077A Method for recovery of metals from chloride solutions |
| 05/18/1989 | DE3836138A1 Particulate medium suitable for the selective separation of metal cations from aqueous solutions, process for the production thereof and use thereof |
| 05/16/1989 | US4830836 Metal stripping system and an operation process therefor |
| 05/09/1989 | US4828661 Process for recovery of metals from metal/plastic waste |
| 05/03/1989 | EP0314352A1 Recovery of noble metals |
| 05/03/1989 | EP0314026A1 Particle agent for the selective removal of metal cations from aqueous solutions, process for its production and its use |
| 05/02/1989 | US4826602 Reduction of trace elements to the elemental form by microorganisms |
| 04/26/1989 | EP0313201A1 Recovery of germanium from aqueous solutions by solvent extraction |
| 04/26/1989 | CN1032554A Process for recovtry of gallium using liquid-liquid extraction |
| 04/20/1989 | WO1989003244A1 Process for producing pulverulent mixed phases with a catalytic action |
| 04/19/1989 | CN1032429A Production of soluble sillicates from biogenetic silics |
| 04/18/1989 | US4822880 1,1'-substituted 2,2'-biimidazole or bibenzimidazoles |
| 04/18/1989 | US4822491 Complexing |
| 04/18/1989 | US4822413 Using ferric sulfate generated by thiobacillus |
| 04/11/1989 | US4820417 Use of citric acid partial esters for the extraction of iron |
| 04/11/1989 | CA1252472A1 Magnesium calcium acetate products, and process for their manufacture |
| 04/06/1989 | DE3732242A1 Process for treating residues containing non-ferrous metals |
| 04/05/1989 | CN2035265U Multi-function pot for solvent extraction |
| 04/04/1989 | US4818774 Organophosphorus compounds |
| 04/04/1989 | US4818504 Solvent extraction with water-insoluble substituted 8-hydroxy quinoline |
| 04/04/1989 | US4818503 Extraction process for removing and recovering metals from aqueous solutions |
| 04/04/1989 | US4818436 Process and composition for providing reduced discoloration of pyrithiones |
| 04/04/1989 | CA1252097A1 Process for the extraction of metal values using hydrocyclic compounds containing two nitrogen hetero-atoms and metal extractants |
| 03/29/1989 | EP0309312A1 Process for the recuperation of gallium by liquid-liquid extraction |
| 03/28/1989 | US4816235 Silver and manganese recovery using acidified thiourea |
| 03/28/1989 | US4815516 Method for recovering casting refractory compositions from investment casting shell molds |
| 03/23/1989 | WO1989002481A1 Process and device for processing hydroxide sludges |
| 03/23/1989 | DE3729913A1 Verfahren und vorrichtung zur aufarbeitung von hydroxidschlaemmen Method and device for regeneration treatment of hydroxidschlaemmen |
| 03/22/1989 | CN1031860A Chemical/biological process to oxidize multimetallic sulphide ores |
| 03/21/1989 | US4814007 Solvent extraction, guanidine compound |
| 03/15/1989 | CN1031720A Indium recovery technology from ferrous solution with high-indium content |
| 03/08/1989 | EP0305747A2 Process and composition for providing reduced discoloration of pyrithiones |
| 03/08/1989 | CN1031567A Dissolution and purification of crude rhodium and high rhodium-containing alloy waste |
| 03/01/1989 | CN1031399A Method of separating and purifying iridium by reduction with hydrogen under pressure |
| 03/01/1989 | CN1031398A Method for producing lithium-containing alumina |
| 02/28/1989 | US4808384 Acid digestion, reduction, separation, extraction, stripping; precipitating impurities |
| 02/28/1989 | US4807854 Leaching solution distribution arm and control therefor |
| 02/23/1989 | WO1989001521A1 Process for producing magnetic powder |
| 02/22/1989 | CN1031255A Technology for industrial extracting gold by thiocarbamide-iron leaching process |
| 02/21/1989 | US4806249 Process for the separation of indium from anidic solutions containing it |
| 02/21/1989 | CA1250242A1 Bioaccumulation of metals |
| 02/21/1989 | CA1250210A1 Process for the treatment of iron- and zinc- containing hydrochloric acid pickles |
| 02/09/1989 | DE3725297A1 Process for removing heavy metals from sludge liquors, sludges and waters containing cyanides or modified isonitriles |
| 02/08/1989 | EP0302345A2 Process for jointly removing undesirable elements from valuable metals containing electrolytic solutions |
| 02/08/1989 | EP0302337A2 Process for separating metal sulphates from sulphuric acid |
| 02/01/1989 | EP0301857A2 Production of soluble silicates from biogenetic silica |
| 02/01/1989 | EP0301783A2 Method for the recovery of metals from chloride solutions |
| 02/01/1989 | EP0301261A2 Process for working up metal sulphate mixtures containing ferrous sulphate |
| 02/01/1989 | CN1030794A Zinc sulfate preparing method using high-silicon zinc oxide ore |
| 01/31/1989 | CA1249427A1 Microbiological control in uranium processing |
| 01/26/1989 | WO1989000612A1 A device for providing a continuous biological decomposition of minerals and concentrates thereof |
| 01/26/1989 | WO1989000444A1 Process for separating metallic ions from aqueous solutions |
| 01/25/1989 | CN1030562A Process for recovery of germanium from solutions containing germanium |
| 01/18/1989 | EP0299901A2 Process for the recovery of germanium from solutions that contain it |
| 01/18/1989 | EP0299169A2 Selective recovery of tin by solvent extraction using branched tertiary phosphine oxides |
| 01/17/1989 | US4798717 Production of elements and compounds by deserpentinization of ultramafic rock |
| 01/17/1989 | CA1248736A1 Apparatus for reducing iron and vanadium in phosphoric acid solution |
| 01/12/1989 | DE3721509A1 Process and apparatus for leaching metal-containing, non-predried raw materials |
| 01/11/1989 | EP0298843A1 Process for separating rare earths by liquid-liquid extraction using solvents containing halogens or carboxylic acids |
| 01/11/1989 | EP0298842A1 Process for separating rare earths by liquid-liquid extraction using fluoride-type solvents |
| 01/11/1989 | EP0298763A2 Method for recovering titanium |
| 01/10/1989 | CA1248440A1 Metal-refining process and system |
| 01/10/1989 | CA1248329A1 Ion exchange column |
| 12/21/1988 | CN88100785A Gel-type chelating resins and process for removal of multi-valent, alkaline earth or heavy metal cations from solutions |
| 12/14/1988 | EP0294751A1 Process for winning gallium from basic aqueous sodium aluminate solutions by liquid-liquid extraction |
| 12/14/1988 | EP0294387A1 Method and apparatus for biological processing of metal-containing ores. |
| 12/13/1988 | CA1246345A1 Processes relating to the extraction of metals from laterites and ocean manganese nodules |
| 12/13/1988 | CA1246326A1 Metal stripping system and an operation process therefor |
| 12/06/1988 | US4789481 Metal recovery |
| 12/06/1988 | US4789478 Mixed culture of citrobacter and sulfate reducer |
| 12/06/1988 | US4789446 Method of processing residues from the hydrometallurgical production of zinc |
| 12/01/1988 | WO1988009389A1 Separation and recovery of nickel and cobalt in ammoniacal systems |
| 11/30/1988 | CN88102672A Process for recovery of gallium using liquid-liquid extraction |
| 11/29/1988 | US4788044 Method for recovering vanadium from residues from the combustion of petroleum fractions |
| 11/29/1988 | US4787970 Process and system for dewatering metal oxide sludge |
| 11/29/1988 | CA1245458A1 Process for the treatment of complex manganese ores, such as marine nodules |
| 11/29/1988 | CA1245457A1 Recovery of tungsten from ammoniacal solutions |
| 11/29/1988 | CA1245456A1 Process for the recovery of molybdenum-99 from an irradiated uranium alloy target |
| 11/23/1988 | EP0291746A1 Process for removing metals from soils, dusts and sludges |
| 11/23/1988 | CN88102521A Purifying method for the salt of barium |
| 11/22/1988 | US4786621 Process for recovery of cobalt and manganese for oxidation residue incinerator ash |
| 11/22/1988 | US4786481 Method for eluting a metal adsorbed on a chelating agent |
| 11/22/1988 | US4786323 Process for the recovery of noble metals from ore-concentrates |
| 11/22/1988 | EP0270637A4 Manufacture of high purity zirconia from low-silica zirconiferous materials. |
| 11/22/1988 | CA1245056A1 Process for hydroformylation with rhodium catalysts and the separation of rhodium therefrom |