| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 01/11/1990 | WO1990000157A1 Process for decomposition of metal-cyano complexes using microbial enzymes |
| 01/11/1990 | DE3827605C1 Process for recovering silver from silver chloride |
| 01/09/1990 | US4892715 Pretreatment of uranium ore by oxidation, leaching with acidic solution |
| 01/03/1990 | EP0349348A1 Process for decomposition of metal-cyano complexes using microbial enzymes |
| 01/03/1990 | EP0348833A2 Process for the separation and recuperation of rhodium from oxysynthesis products |
| 01/02/1990 | US4891163 Method of processing nuclear fuel scraps |
| 01/02/1990 | US4891130 Process for removing metals from aluminosilicate materials |
| 12/28/1989 | DE3920144A1 Orbital umgelagerte, monoatomare elemente, verfahrenzu ihrer herstellung und ihre weiterverarbeitung Orbital rearranged monoatomic, elements, verfahrenzu their production and their further processing |
| 12/20/1989 | EP0347284A1 Process of recovering gallium |
| 12/19/1989 | US4888293 Adapting bacteria to low pH and high arsenic concentration for use in oxidizing sulfide ores |
| 12/19/1989 | US4887799 Apparatus for treatment of ore particles |
| 12/13/1989 | CN1037875A Stocking impregnation technology for ion-adsorption type of rare-earth minerals |
| 12/12/1989 | US4886648 Complexing with acid, extracting with organic solution, scrubbing, dissociating and precipitating |
| 12/06/1989 | EP0344324A1 Process for producing particulate metal powder |
| 12/05/1989 | US4885098 Vibrating bar immersed in liquid aids agglomeration, settling |
| 12/05/1989 | CA1263641A1 Immobilised extractants |
| 12/05/1989 | CA1263540A1 Oxidation leaching |
| 12/05/1989 | CA1263539A1 Process for the separation of indium from acidic solutions containing it |
| 11/29/1989 | EP0344143A2 Gallium purification |
| 11/29/1989 | CN1037547A Method for recovering silver from waste emulsion and film |
| 11/28/1989 | US4883532 Using oscilator to produce cycloidal resonant wave vibration |
| 11/28/1989 | CA1263365A1 Catalyst recovery process |
| 11/28/1989 | CA1263239A1 Process for separating arsenic from acid solutions which contain it |
| 11/21/1989 | US4882132 Using hydrocarbon solvent |
| 11/21/1989 | US4882131 Process for recovering tungsten from organic solutions |
| 11/21/1989 | US4881973 Life silver recovery system |
| 11/21/1989 | US4881574 Enclosed rotary disc air pulser |
| 11/16/1989 | WO1989010981A1 Apparatus and method for dissolving hazardous waste materials by catalyzed electrochemical dissolution |
| 11/14/1989 | US4880740 Reduction, precipitation, cultures, microorganisms |
| 11/14/1989 | US4880607 Leaching with diluents to recover uranium |
| 11/14/1989 | US4880546 Recovery of transition metals from aqueous solutions |
| 11/14/1989 | EP0289537A4 Process for the production of zirconium sulphate. |
| 11/09/1989 | EP0294387A4 Method and apparatus for biological processing of metal-containing ores. |
| 11/08/1989 | EP0341119A1 Process for treating scrap containing rare earths and cobalt |
| 11/07/1989 | US4879388 Aqueous solutions containing halides |
| 11/07/1989 | CA1262635A1 Method for recovering gallium |
| 11/02/1989 | EP0339558A1 Solvent extraction process |
| 11/02/1989 | EP0339230A1 Process for the detoxification of effluents from ore processing operations with hydrogen peroxide, using a magnetic pre-separation stage |
| 11/01/1989 | CN1036745A Method for removal of heavy metals, especially cadmium, from phophoric acid containing solutions |
| 11/01/1989 | CN1005628B A complete wet process for producing sponge silver and silver nitrate from silver ore |
| 10/24/1989 | US4876386 Process for the oxidation of di- or trimethylbenzenes in the presence of cobalt and manganese from oxidation residue incinerator ash |
| 10/17/1989 | USRE33095 Magnesium calcium acetate products, and process for their manufacture |
| 10/17/1989 | US4874534 Air bubbles bind drops and form froth on upper surface |
| 10/17/1989 | US4874429 Hydrometallurgical process for the recovery of silver from copper electrolysis anode sludge |
| 10/11/1989 | EP0335934A1 Process for producing pulverulent mixed phases with a catalytic action |
| 10/10/1989 | US4872909 Solubilizing and recovery of manganese, cobalt, nickel from marine nodules and crusts |
| 10/05/1989 | WO1989009289A1 A process of recovering non-ferrous metal values, especially nickel, cobalt, copper and zinc, by using melt and melt coating sulphation, from raw materials containing said metals |
| 10/03/1989 | US4871464 Using acidic phosphoric acid ester |
| 10/03/1989 | CA1262031A1 Production of elements and compounds by deserpentinization of ultramafic rock |
| 09/27/1989 | EP0334730A1 Process for the liquid-liquid extraction of gallium from basic aqueous solutions using an organic phase |
| 09/27/1989 | EP0334077A1 Method for recovering refractory compositions from investment casting shell molds |
| 09/27/1989 | EP0333796A1 Process and device for processing hydroxide sludges |
| 09/27/1989 | CN1035851A Solvent extraction process |
| 09/26/1989 | CA1261709A1 Metal recovery |
| 09/20/1989 | EP0333489A2 Process for the removal of heavy metal ions from phosphoric acid |
| 09/20/1989 | CN2044512U Large-sized horizontal case-type extractor with mixing and clearing functions |
| 09/20/1989 | CN1035680A Separating technique of mercury and antimony in composite mineral |
| 09/19/1989 | US4868120 Method of recovering both silver and a base for sensitive materials from sensitive materials by utilizing micro-organisms |
| 09/19/1989 | US4867951 Separation of actinides from lanthanides |
| 09/19/1989 | CA1259471A1 Catalyst recovery process |
| 09/13/1989 | EP0332512A1 Process for electrochemically oxidising cerium 3+ to cerium 4+, in an emulsion |
| 09/13/1989 | EP0332447A1 Selective removal of metal cations from aqueous effluent solutions |
| 09/13/1989 | EP0332314A2 Solvent extraction process |
| 09/12/1989 | US4865824 Process for recovering gallium from basic aqueous sodium aluminate solutions by means of liquid-liquid extraction |
| 09/12/1989 | CA1259196A1 Method for eluting a metal adsorbed on an chelating agent |
| 09/08/1989 | WO1989008075A1 Method for removal of heavy metals, especially cadmium, from phosphoric acid containing solutions |
| 09/06/1989 | CN1035321A Method using composite extractant to produce high-pure gold |
| 09/06/1989 | CN1035274A Method for removal of organic solvents from aqueous process streams |
| 09/05/1989 | US4863580 Waste metal extraction apparatus |
| 09/05/1989 | US4863510 Reduction process for preparing copper, silver, and admixed silver-palladium metal particles |
| 09/05/1989 | CA1258978A1 Method for separation and leaching of the valuable metals in metal sulphide materials |
| 08/29/1989 | US4861564 Method of use of 1,3 disubstituted aromatic cyclohexane imides as chelating agents |
| 08/22/1989 | US4859293 Making gold iodide solution in electrolytic cell; basification, reduction, precipitation |
| 08/09/1989 | EP0327234A1 Extraction of iron from phosphoric acid |
| 08/08/1989 | US4855114 Using hydroxyquinoline |
| 08/08/1989 | CA1258181A1 Process for producing enriched mineral ore concentrates |
| 08/08/1989 | CA1258180A1 Leaching process of zinc and iron containing sulphides |
| 08/03/1989 | DE3801430A1 Process for removing iron(III) from acid zinc salt solutions by solvent extraction |
| 07/26/1989 | EP0324963A1 Metal extraction process |
| 07/26/1989 | EP0324843A1 Process for separating metallic ions from aqueous solutions |
| 07/26/1989 | EP0221136B1 Catalyst recovery process |
| 07/25/1989 | US4851129 Process for the detoxification of effluents from ore processing operations with hydrogen peroxide, using a magnetic pre-separation stage |
| 07/25/1989 | CA1257766A1 Process for producing fluorides of metals |
| 07/20/1989 | DE3812501A1 Process and apparatus for precipitating and recovering silver and mercury from spent, titrated solutions, which are strongly acid with sulphuric acid, for the determination of chemical oxygen demand |
| 07/18/1989 | CA1257482A1 Metal recovery |
| 07/13/1989 | WO1989006161A1 Method for removal of organic solvents from aqueous process streams |
| 07/12/1989 | CN1033784A Concentrated-acid ripening and extraction and depolymerizing-solution extraction technology of molybdenum-nickel ore |
| 07/12/1989 | CN1033748A Recovery of noble metals |
| 07/11/1989 | CA1257260A1 Triazolopyrimidine extractants |
| 07/11/1989 | CA1257073A1 Stabilisation of aqueous acid solutions including hydrogen peroxide and metal ions |
| 07/05/1989 | EP0322661A2 Process for the recuperation of rhodium from aqueous solutions containing complex rhodium compounds |
| 07/05/1989 | EP0322441A1 A device for providing a continuous biological decomposition of minerals and concentrates thereof |
| 07/04/1989 | US4844808 Liquid/liquid extraction of gallium values |
| 06/29/1989 | WO1989005866A1 Metal recovery process |
| 06/29/1989 | WO1989005684A1 Mixing-settling apparatus for liquid-liquid extraction |
| 06/28/1989 | CN1004636B Hydrometallurgy of extracting spongy tin and tin salts from medium tin ore |
| 06/28/1989 | CN1004635B Wet process for extracting metallic compound from multi-metal refractory paragenetic ore |
| 06/27/1989 | US4842644 Silver recovery method |
| 06/21/1989 | CN1033465A Processing method for mineral materials containing copper oxide |
| 06/15/1989 | WO1989005363A1 Vanadium compound dissolution processes |