| Patents for C22B 15 - Obtaining copper (5,364) |
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| 07/26/1994 | US5332560 Process for the removal of zinc and nickel from copper ammine sulfate solutions |
| 06/14/1994 | US5320799 Anode furnace used as receiver and for refinings |
| 06/14/1994 | US5320662 Providing anode furnaces and blister copper producing means, causing blister copper to flow to copper launder means, refining into higher purity copper in anode furnace |
| 06/08/1994 | EP0599911A1 Copper recovery process |
| 05/31/1994 | US5316567 Agitation leaching, solvent extraction |
| 05/18/1994 | CN1086765A Refractory material coated paper oxygen blowing tube |
| 05/10/1994 | US5310486 Multi-stage water treatment system and method for operating the same |
| 05/10/1994 | CA1329325C Method of recovering copper and a furnace for carrying out the method |
| 05/03/1994 | US5308379 Extra-low-oxygen copper and a method of processing same |
| 04/28/1994 | WO1994009166A1 Method and apparatus for treatment of sulphidic concentrates |
| 04/26/1994 | US5306329 Phosphorous deoxidation of metal |
| 04/26/1994 | US5306328 Purifying the copper catalyst from the synthesis of methylchlorosilane by dissolving with hydrochloric acid or sulfuric acid, mixing iron powder with filtrate solution |
| 04/14/1994 | WO1994008058A1 Method for hydrometallurgical processing of zincky byproducts |
| 04/12/1994 | CA1328353C Recovery of zinc from zinc bearing sulphidic ores and concentrates by controlled oxidation roasting |
| 04/10/1994 | CA2107963A1 Tailings retreatment |
| 04/06/1994 | EP0590043A1 Method for processing complex metal sulphide materials |
| 03/16/1994 | EP0410996B1 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 |
| 03/15/1994 | US5293924 Manufacture of copper rod |
| 03/10/1994 | DE4229793A1 Permanent electrode for electrolytic copper@ refining - comprises assembly of steel electrode plate, copper@ intermediate plate and steel crossbar |
| 03/08/1994 | CA1327452C Separation of nickel from copper in autoclave |
| 03/03/1994 | WO1993016204A3 Process and apparatus for extracting solutes from their aqueous solutions |
| 03/02/1994 | CN1023904C Smelting process |
| 01/25/1994 | US5281336 Composition and use of the composition for the extraction of metals from aqueous solution |
| 01/25/1994 | US5281252 Providing molten bath of sulfide material, injecting particles of sulfide below surface, bottom stirring, top blowing with oxygen containing gas to form metal and sulfur containing gas |
| 01/25/1994 | CA1326371C Oxidation process |
| 01/18/1994 | US5279641 Method for concurrent production of copper powder and a metal chloride |
| 01/18/1994 | CA1326138C Removal of copper converter mush |
| 01/11/1994 | CA1326007C Supported heteropolycyclic compounds in the separation and removal of late transition metals |
| 01/06/1994 | WO1994000607A1 Hydrometallurgical copper extraction process |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 12/29/1993 | CN1080043A Method for melting copper |
| 12/21/1993 | US5271909 Method of tellurium separation from copper electrorefining slime |
| 12/09/1993 | WO1993024666A1 Oxygen smelting |
| 12/09/1993 | WO1993024665A1 Method for melting copper |
| 12/09/1993 | CA2136425A1 Oxygen smelting |
| 12/07/1993 | CA1325068C Depressant for flotation separation of polymetallic sulphidic ores |
| 12/07/1993 | CA1324977C Process of treating residues from the hydrometallurgical production of zinc |
| 12/02/1993 | DE4317733A1 Gas-supply adjuster for melting furnace - delivers in separate currents to reaction chamber and adjusts their outlet speeds |
| 11/30/1993 | US5266212 Precipitation of copper-organophosphonate compounds by addition of simple carboxylic acids(or salts) leaves soluble impurities in solution |
| 11/25/1993 | WO1993023579A1 Process and device for the recovery and reutilisation of metallic compounds |
| 11/24/1993 | CN1022846C Method and burner for melting copper |
| 10/26/1993 | CA1323495C Process and apparatus for converting of solid high-grade copper matte |
| 10/06/1993 | EP0564401A2 Method of selective recovery of ferrous and nonferrous metals from industrial wastes and scrap home electric appliances |
| 10/05/1993 | US5250273 Recovering gold, uranium, copper, zinc, mickel and lead from ores, calcines |
| 10/05/1993 | CA1322659C Pyrometallurgical copper refining |
| 09/30/1993 | DE4227568A1 Reclamation of chromium@, PCB and plastics from discarded computers - by direct and indirect heating in a blast furnace with removal and, if necessary destruction of components at different temps. |
| 09/28/1993 | US5248441 Process for the recovery of copper from copper-containing industrial waste waters |
| 09/21/1993 | US5246484 Injection of a reducing agent and oxygen to improve gasification |
| 08/31/1993 | US5240494 Controlling burners within desired air/fuel ratio to avoid incorporating unwanted oxygen |
| 08/19/1993 | WO1993016204A2 Process and apparatus for extracting solutes from their aqueous solutions |
| 08/17/1993 | US5236491 Contacting with selective anionic resin; maintaining pH between 4.0 and 5.5; elution with mineral acid; treating eluate |
| 07/14/1993 | EP0551155A1 Process for recovering zinc and lead from flue dusts from electrical steel works and for recycling said purified metals to the furnace, and installation for implementing said process |
| 07/14/1993 | EP0550857A1 Process for preparing copper powder |
| 07/06/1993 | CA1319826C Treatment of sulphuric acid solutions containing tellurium, copper sulphate and minor impurity elements |
| 06/30/1993 | EP0548363A1 Process for purifying raw material of copper or its alloy |
| 06/29/1993 | US5223087 Chemical solubilizing agent for tin or tin alloy |
| 06/29/1993 | US5223024 Agitation leaching sulfide ore at elevated temperature and pressure in presence of oxygen and water, neutralizing acidic liquor by percolation through bed of low grade ore |
| 06/17/1993 | DE4140640A1 Copper@ recovery from discarded circuit boards - uses mixt. of organic acid and halogenated hydrocarbon(s) for sepn. and recovery |
| 06/09/1993 | CN1072962A Extraction method for copper with bottom-blown molten pool and its installation |
| 06/08/1993 | US5217527 Process for continuous copper smelting |
| 06/01/1993 | US5215571 Conversion of non-ferrous matte |
| 05/27/1993 | WO1993006952A3 Process for removing heavy metals from soils |
| 05/27/1993 | DE4207547A1 Recovery of copper@ from combustion residues - by extraction with polyfunctional aliphatic amine(s) followed by electrolysis |
| 05/04/1993 | US5207996 Acid leaching of copper ore heap with fluoroaliphatic surfactant |
| 04/29/1993 | WO1993008310A1 Extraction or recovery of metal values |
| 04/29/1993 | CA2119240A1 Extraction or recovery of metal values |
| 04/28/1993 | EP0538278A1 Reclamation of metal from scrap. |
| 04/27/1993 | US5205859 Apparatus for continuous copper smelting |
| 04/21/1993 | EP0538168A1 Process for the recovery of non ferrous metal values from pyrite cinders |
| 04/15/1993 | WO1993006952A2 Process for removing heavy metals from soils |
| 04/15/1993 | DE4133400A1 Sepg. metals e.g. copper@ and noble metals form solns. - by means of dissolved hydrogen@ in loop reactor, for use e.g. in galvanising installations |
| 04/15/1993 | CA2119021A1 Process for removing heavy metals from soil |
| 04/14/1993 | EP0536914A1 Acid leaching of copper ore heap with fluoroaliphatic surfactant |
| 04/06/1993 | US5200042 Process to recover pure copper during purification of zinc sulfate solution |
| 03/30/1993 | CA1315099C Tuyere assembly and positioning method |
| 03/16/1993 | US5194213 Copper smelting system |
| 03/04/1993 | WO1993004208A1 Copper recovery process |
| 03/04/1993 | DE4128837A1 Removing copper@ and-or nickel@ from aq. media - by using special porous anion exchange resins with weakly basic morpholine or piperazine gps., etc. |
| 03/04/1993 | CA2115160A1 Copper recovery process |
| 02/24/1993 | EP0528361A1 Improved method of tellurium separation from copper electrorefining slime |
| 02/23/1993 | US5188703 Method and apparatus for recovering copper and regenerating ammoniacal etchant from spent ammoniacal etchant |
| 01/27/1993 | EP0524782A2 Treatment of copper sulfide concentrates |
| 01/21/1993 | WO1993001135A1 Apparatus and process for removal of dissolved metal forms |
| 01/20/1993 | CA2067472A1 Treatment of copper sulfide concentrates |
| 01/19/1993 | US5180422 Using by-product gypsum as flux in converting furnace |
| 01/16/1993 | WO1993002219A1 Process for purifying raw material of copper or its alloy |
| 01/07/1993 | EP0328613B1 Metallurgical controlling method |
| 01/05/1993 | US5176802 Treatment of copper sulfide concentrates |
| 12/22/1992 | US5173276 Method for recovery of copper from copper-containing materials |
| 12/20/1992 | WO1992022673A1 Method for processing complex metal sulphide materials |
| 12/20/1992 | CA2102791A1 Method for processing complex metal sulphide materials |
| 12/08/1992 | US5169538 Removal of nobler metal ions than iron from process and waste waters |
| 11/11/1992 | CN1066087A Copper powderagitated by use of reactive hydrogen and extracted by air-floated method, and its displacement device |
| 10/15/1992 | WO1992017614A1 Copper ion flotation with cationic reagents |
| 10/14/1992 | EP0508501A1 Method of reducing non-ferrous metal oxides in slags |
| 10/07/1992 | CN1065099A Process of reducing nonferrous metal oxides in slags |
| 09/23/1992 | CN2116699U Mixed gas copper smelting furnace |
| 09/22/1992 | US5149845 Hydoxamate |
| 09/17/1992 | CA2062184A1 Process of reducing nonferrous metal oxides in slags |
| 09/15/1992 | CA1307395C Tank furnace for the metallurgical treatment of non-ferrous metals |