| Patents for C22B 15 - Obtaining copper (5,364) |
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| 09/08/1981 | US4288304 Hydrometallurgical process for treatment of sulphur ores |
| 09/08/1981 | CA1108376A1 Method of removal of arsenic from a sulfuric acid solution |
| 09/01/1981 | CA1107975A1 Process for selective extraction of metal ions from aqueous solutions and extracting agents suitable for that purpose |
| 09/01/1981 | CA1107973A1 Recovery of silver, copper and zinc from partially roasted pyrite concentrate by ferric sulphate leaching |
| 08/25/1981 | CA1107515A1 Continuous smelting and refining of cement copper |
| 08/18/1981 | US4284428 Separation of contaminant material from copper wire and cable |
| 08/18/1981 | CA1107082A1 Process for the recovery of metal from a solution by precipitation |
| 08/11/1981 | US4283290 For recovery of dissolved species in aqueous solutions |
| 08/11/1981 | CA1106622A1 Hydrometallurgical method for treating sulphide ores |
| 08/11/1981 | CA1106617A1 Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt |
| 08/04/1981 | US4281821 Method of controlling the suction gas pressure of a sulfuric acid plant for treatment of smelter exhaust gas |
| 07/28/1981 | CA1105713A1 Method for leaching and precipitating metal from a solid containing metal |
| 07/21/1981 | US4279867 Flotation |
| 07/21/1981 | CA1105410A1 Method of obtaining copper from sulphurized concentrates |
| 07/21/1981 | CA1105267A1 Process for the extraction of metal values from manganese nodules |
| 07/14/1981 | CA1104837A1 Process for recovery of copper and zinc from complex sulfides |
| 07/14/1981 | CA1104835A1 Method of and electric furnace for processing nonferrous molten slags |
| 07/07/1981 | US4277281 Adsorption of calcium and iron impurities on ceramic foam filter |
| 06/23/1981 | US4274870 Smelting of copper concentrates by oxygen injection in conventional reverberatory furnaces |
| 06/23/1981 | US4274785 Method and apparatus for charging anode scraps to a converter furnace |
| 06/23/1981 | CA1103464A1 Separation and recovery of copper metal from ammoniacal solutions |
| 06/10/1981 | EP0030067A1 Process for the extraction of metal ions |
| 06/09/1981 | CA1102558A1 Reverberatory smelting of non-ferrous metal sulfide ores |
| 05/28/1981 | WO1981001420A1 A process for recovering non-ferrous metal values from ores,concentrates,oxidic roasting products or slags |
| 05/26/1981 | US4269676 Leaching using a solvent mixture of pyridine, a-, b-, or g-picoline or 2,6-lutidine and a chlorinated methane to form a soluble metal complex |
| 05/26/1981 | CA1101679A1 Leaching of ni-cu-fe-s matte |
| 05/20/1981 | EP0028968A1 Process for treating a metal in a melting bath |
| 05/14/1981 | WO1981001297A1 A method of purifying non-ferrous metal melts from foreign elements |
| 05/12/1981 | US4266971 Continuous process of converting non-ferrous metal sulfide concentrates |
| 05/12/1981 | CA1100763A1 Hydrometallurgical leaching and refining of nickel- copper concentrates |
| 04/30/1981 | WO1981001159A1 Process and apparatus for producing metals at porous hydrophobic catalytic barriers |
| 04/28/1981 | CA1100094A1 Recovery of dissolved species from aqueous solutions by a liquid membrane technique |
| 04/21/1981 | CA1099517A1 Method for the reduction, extraction and separation of metals and/or metal compounds from metal containing raw materials |
| 04/21/1981 | CA1099508A1 Apparatus for melting and refining raw copper or blister copper |
| 04/14/1981 | US4261743 Pyrometalurgical smelting of lead and copper |
| 04/14/1981 | US4261737 Leaching ore with ammoniacal ammonium salt solution, adsorption oncarbon which has been pretreated with acid |
| 04/07/1981 | US4260588 Production of sulphidic copper concentrates |
| 04/07/1981 | CA1098861A1 Method of obtaining copper from copper-bearing ores |
| 04/07/1981 | CA1098717A1 Flash smelting in confined space |
| 03/31/1981 | US4259108 Thermochemical process for recovering Cu from CuO or CuO2 |
| 03/25/1981 | EP0025466A1 A process for the recovery of arsenic as zinc arsenate from cement copper cake and a process for the purification of an impure zinc electrolyte using zinc arsenate so obtained |
| 03/17/1981 | US4256553 Leaching with solution of sulfuric acid and ferric sulfate, then treating with sulfur dioxide and unleached ore to effect precipitation of copper sulfides and obtain dissolved ferrous sulfate |
| 03/17/1981 | CA1097508A1 Recovery of metal values |
| 03/03/1981 | CA1096636A1 Hydrometallurgical process for the selective dissolution of mixtures of oxy compounds |
| 02/24/1981 | US4252622 Using dilute sulfuric acid and either coarse or fine zinc to precipitate cement copper and cobalt; multistage |
| 02/10/1981 | US4249939 Cuprous aluminum tetrahalides, precipitation by hydrolysis, oxidation, cementation |
| 02/10/1981 | US4249905 Using a conditioner and a hydrophobic bridging liquid to form agglomerates; separation from aqueous phase |
| 02/10/1981 | CA1095264A1 Thermo-activation process |
| 02/10/1981 | CA1095259A1 Addition of reactive elements in powder wire form to copper base alloys |
| 02/04/1981 | EP0023428A1 Liquid-liquid process for extracting metals using organo-phosphorous compounds |
| 02/03/1981 | CA1094819A1 Hydrometallurgical process for the recovery of zinc, copper, and cadmium from their ferrites |
| 02/03/1981 | CA1094817A1 Hydrometallurgical recovery of metal values |
| 01/27/1981 | CA1094297A1 Procedure and means for producing a suspension of a powdery substance and a reaction gas |
| 01/20/1981 | US4246185 Catalyst metal separation from saturated aliphatic monocarboxylic acids |
| 01/20/1981 | US4245821 Refining furnace for nonferrous metal |
| 01/20/1981 | CA1094012A1 Atmospheric leach ion-exchange process for treating iron-containing nickel-copper matte |
| 01/20/1981 | CA1094011A1 Dichromate leach of copper anode slimes |
| 01/20/1981 | CA1093839A1 Hydrometallurgical recovery of metal values |
| 01/20/1981 | CA1093838A1 Recovery of copper |
| 01/20/1981 | CA1093837A1 Dump leaching |
| 01/20/1981 | CA1093836A1 Recovery of metal values from reverberatory slag |
| 01/20/1981 | CA1093835A1 Removal of arsenic, antimony and bismuth from molten copper with sulfur hexafluoride |
| 01/20/1981 | CA1093834A1 Pyrometallurgical recovery of copper from slag material |
| 01/13/1981 | US4244733 Method of producing blister copper from copper raw material containing antimony |
| 01/13/1981 | CA1093537A1 Oximes and process for the separation of copper values from aqueous solutions |
| 01/06/1981 | US4243411 Reduction of metal sulfides |
| 01/06/1981 | US4243209 Multiple level refractory hearth for vertical shaft metal melting furnaces |
| 01/06/1981 | CA1092832A1 Method of producing blister copper |
| 12/30/1980 | US4242129 Method of recovering metals |
| 12/30/1980 | US4242128 Adding iron particles to plate out metal phthalates |
| 12/30/1980 | CA1092360A1 Process for recovery of selected metal values from waste waters |
| 12/23/1980 | US4241039 Oxidation, precipitation of ferric hydroxide |
| 12/23/1980 | US4240981 Increasing proportion of anti isomer by chelation with nickel compound |
| 12/23/1980 | US4240826 Process for the recovery of arsenic as a zinc arsenate and its _utilization in the purification of zinc plant electrolytes |
| 12/16/1980 | US4239191 Apparatus for controlling combustion in a metal melting furnace |
| 12/10/1980 | EP0020186A1 Method of converting non-ferrous metal mattes to the metal or metal sulphide |
| 12/09/1980 | US4238228 Non-ferrous metal treatment |
| 12/09/1980 | CA1091037A1 Liquid ion exchange process for the recovery of copper and nickel |
| 12/09/1980 | CA1091036A1 Roast-reductive leach process for copper recovery |
| 12/09/1980 | CA1091035A1 Slimes treatment process |
| 12/02/1980 | US4236918 Recovery of elemental sulfur and metal values from tailings from copper recovery processes |
| 12/02/1980 | US4236915 Producing a metal matte |
| 12/02/1980 | US4236913 Argon, carbon dioxide, nitrogen |
| 11/25/1980 | CA1090145A1 Extraction recovery of certain metal values |
| 11/25/1980 | CA1090143A1 Method of recovering zinc from a material containing zinc and iron |
| 11/18/1980 | CA1089902A1 Matte smelting |
| 11/18/1980 | CA1089653A1 Selective recovery of nickel and cobalt or copper and zinc from solution |
| 11/18/1980 | CA1089652A1 Method of melting copper alloys |
| 11/18/1980 | CA1089649A1 Reduction of metal oxides to sponge metal |
| 11/11/1980 | CA1089188A1 Purification of copper sulfate solution |
| 11/04/1980 | US4231993 Recovery of metal values from lead smelter matte |
| 11/04/1980 | CA1088757A1 Process for extracting nickel, nickel-copper, nickel- cobalt and nickel-copper-cobalt from concentrates or slags bearing the same |
| 10/28/1980 | US4230487 Method of selectively bringing into solution the non-ferrous metals contained in sulphurized ores and concentrates |
| 10/28/1980 | US4230307 Cooling apparatus for copper converter opening |
| 10/21/1980 | US4229270 Process for the recovery of metal values from anode slimes |
| 10/21/1980 | US4229212 Using an organonitrile as stabilizer |
| 10/21/1980 | CA1087861A1 Recovery of valuable metals and compounds thereof contained in molten slag |
| 10/14/1980 | CA1087397A1 Scrubbing of ammonia from liquid ion exchange reagents |
| 10/07/1980 | CA1086958A1 Hydrolysis of soluble copper in an aqueous ammoniacal liquor |
| 10/07/1980 | CA1086956A1 Method and apparatus for gaseous reduction of metal ores |