| Patents for C22B 15 - Obtaining copper (5,364) |
|---|
| 01/09/1990 | CA1264252A1 Apparatus for producing ignitable solids-gas suspensions |
| 12/12/1989 | CA1263879A1 Circumferential sealing assembly |
| 11/16/1989 | WO1989010791A1 Depressant for flotation separation of polymetallic sulphidic ores |
| 11/07/1989 | CA1262636A1 Pre-refining treatment of metals and alloys |
| 10/31/1989 | US4877517 Using crosslinked starch, polyacrylate, and lignin sulfonate |
| 10/31/1989 | US4877449 Vertical shaft melting furnace and method of melting |
| 10/24/1989 | US4876232 Phenanthroline on carbon or charcoal support |
| 10/24/1989 | US4875935 Anionic acrylamide polymers as copper ore agglomeration aids |
| 10/11/1989 | EP0335971A1 Supported heteropolycyclic compounds in the separation and removal of late transition metals |
| 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 | US4871147 Apparatus for the pyrometallurgical processing of fine-grained solids |
| 09/11/1989 | EP0335971A4 Supported heteropolycyclic compounds in the separation and removal of late transition metals. |
| 09/05/1989 | US4863510 Reduction process for preparing copper, silver, and admixed silver-palladium metal particles |
| 08/23/1989 | EP0328613A1 Metallurgical controlling method |
| 08/23/1989 | EP0214268B1 A method for working-up waste products containing valuable metals |
| 08/23/1989 | CN1034960A Nitrogen-blow fire refining technique of raw copper |
| 08/15/1989 | US4857104 Process for reduction smelting of materials containing base metals |
| 08/08/1989 | CA1258180A1 Leaching process of zinc and iron containing sulphides |
| 07/18/1989 | US4848754 Flash smelting furnace |
| 07/18/1989 | US4848750 Method for constructing and repairing metallurgical converters |
| 07/18/1989 | CA1257482A1 Metal recovery |
| 07/12/1989 | CN1033843A Oxygen-rich copper-smelting method using silver molten-bath and relevant apparatus |
| 06/21/1989 | CN1033465A Processing method for mineral materials containing copper oxide |
| 06/08/1989 | DE3805418C1 Process for mechanically recovering copper from blown brass dusts |
| 05/31/1989 | EP0174991B1 Circumferential sealing assembly |
| 05/30/1989 | US4834793 Oxidation process for releasing metal values in which nitric acid is regenerated in situ |
| 05/24/1989 | EP0316785A1 Process for removing copper from waste water |
| 05/16/1989 | US4830667 Sparging with oxygen, then inert gas |
| 05/09/1989 | US4828809 Separation of nickel from copper in autoclave |
| 05/09/1989 | US4828609 Method to protect the surface of metal in vertical melting furnaces |
| 05/02/1989 | US4826544 Hydrogen cleaning of hot copper rod |
| 04/25/1989 | US4824362 Method for operation of flash smelting furnace |
| 04/20/1989 | WO1989003434A1 Supported heteropolycyclic compounds in the separation and removal of late transition metals |
| 04/18/1989 | US4822413 Using ferric sulfate generated by thiobacillus |
| 03/21/1989 | US4814004 Cleaning slag |
| 02/23/1989 | WO1989001530A1 Metallurgical controlling method |
| 02/15/1989 | EP0303285A1 Tuyere assembly and positioning method |
| 02/07/1989 | US4802917 Charging a sulfide ore; combustion; producing an iron, silica, copper slag, molten copper and sulfur dioxide |
| 02/07/1989 | US4802916 Copper smelting combined with slag cleaning |
| 02/07/1989 | CA1249885A1 Membrane processes for metal recovery and pollution control in metal process industries |
| 01/17/1989 | US4798532 Flash smelting furnace |
| 01/03/1989 | US4795490 Copper melting |
| 01/03/1989 | CA1247865A1 Method of treating the slag from a copper converter |
| 12/28/1988 | CA1247373A Method and apparatus for processing sulphide concentrates and sulphide ores into raw metal |
| 12/13/1988 | CA1246489A1 Electrowinning copper in hydrometallurgical process including a membrane cell |
| 12/06/1988 | US4789529 Recovery of zinc from zinc bearing sulphidic ores and concentrates by controlled oxidation roasting |
| 12/06/1988 | US4789446 Method of processing residues from the hydrometallurgical production of zinc |
| 11/30/1988 | EP0292992A2 Non-ferrous metal recovery |
| 11/29/1988 | CA1245460A1 Oxidizing process for sulfidic copper material |
| 11/29/1988 | CA1245458A1 Process for the treatment of complex manganese ores, such as marine nodules |
| 11/22/1988 | US4786469 Grain refining metals |
| 11/22/1988 | CA1245058A1 Oxidizing process for copper sulfidic ore concentrate |
| 11/15/1988 | CA1244655A1 Method for recovering the valuable metal content of contaminated copper raw material |
| 11/01/1988 | US4781755 Pyrometallurgy, plasma jets |
| 10/18/1988 | CA1243272A1 Process for the deposition of metals on semiconductor powders |
| 10/12/1988 | CN87102448A Process for dressing copper oxide ore |
| 10/06/1988 | WO1988007591A1 Method for concentrating oxidized copper ore |
| 10/04/1988 | US4775763 Metal extractants |
| 10/04/1988 | US4775480 Membrane processes for treatment of and recovery of components from kraft black liquors |
| 09/27/1988 | US4773630 Tank furnace for the metallurgical treatment of non-ferrous metals |
| 09/20/1988 | US4772395 Silicon carbide coated porous filters |
| 09/14/1988 | CN85106114B Smelting process for recovering metals from non-ferrous metal oxide ores or concentrates and/or from fine-grained non-ferrous metal sultide ores or concent rates,and apparatus for carrying out that pr |
| 09/13/1988 | US4770698 Method for making low alpha count lead |
| 08/09/1988 | US4762694 Molten salt extraction process for the recovery of valued transition metals from land-based and deep-sea minerals |
| 07/27/1988 | EP0276032A1 Instant smelting process for sulfidic ores |
| 07/19/1988 | US4758271 Continuous copper drossing of lead |
| 07/05/1988 | US4754951 Tuyere assembly and positioning method |
| 06/01/1988 | EP0182892B1 A method and apparatus for separating metal particles |
| 05/11/1988 | EP0266975A1 Smelting reduction |
| 05/04/1988 | EP0163666B1 Treatment of dross |
| 05/03/1988 | US4741770 Zinc smelting process using oxidation zone and reduction zone |
| 04/20/1988 | CN86105982A Recovery of copper, gold and silver by vulcanizing-roasting at law temperature-ore dressing |
| 04/13/1988 | EP0263539A1 Process for treating zinc hydrometallurgy residues |
| 04/12/1988 | US4737186 Using carbon dust |
| 04/07/1988 | WO1988002408A1 Method of concentration of difficult-to-concentrate oxidized copper ore |
| 04/06/1988 | EP0262964A2 Recovery of nickel or cobalt from solvent extraction strip solutions |
| 04/06/1988 | EP0137776B1 Method of maintaining and testing for proper concentrations of thiourea in copper refining electrolysis cells |
| 04/05/1988 | CA1234696A1 Metallurgical process iii |
| 03/22/1988 | CA1234292A1 Method of lancing for a copper producing converter |
| 03/22/1988 | CA1234289A1 Recovery of platinum group metals from nickel-copper- iron matte |
| 02/16/1988 | CA1232766A1 Agents for the removal of impurities from a molten metal and a process for producing same |
| 02/02/1988 | CA1232141A1 Treatment of dross |
| 01/27/1988 | EP0254711A1 Method for producing copper |
| 01/14/1988 | WO1988000248A1 Separation process |
| 01/14/1988 | DE3641136C1 Metallurgical vessel |
| 01/07/1988 | EP0250666A1 Process for selective dialysis using polymeric affinity adsorbents and size selective membranes |
| 12/09/1987 | EP0248518A1 Separation of nickel from copper in autoclave |
| 12/08/1987 | US4711433 Copper converter |
| 11/24/1987 | US4708740 Filtration of molten metals |
| 11/24/1987 | CA1229488A1 Method and apparatus for the pyrometallurgical treatment of finely granular solids which, at the treatment temperatures, yield molten products |
| 11/17/1987 | US4707185 Method of treating the slag from a copper converter |
| 11/11/1987 | EP0244433A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 11/10/1987 | US4705562 Method for working-up waste products containing valuable metals |
| 11/03/1987 | CA1228735A1 Hydrometallurgical method of extraction of copper from sulphide-containing material |
| 10/27/1987 | CA1228483A1 Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material |
| 10/20/1987 | US4701217 Smelting reduction |
| 10/13/1987 | US4699656 Deoxidation of molten copper |
| 10/06/1987 | US4698162 Method for prevention of metallic precipitate reoxidation/redissolution in aqueous systems |
| 09/29/1987 | CA1227338A1 Production of fine spherical copper powder |
| 09/29/1987 | CA1227336A1 Metal recovery process |