| Patents for C22B 7 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof (11,341) |
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| 04/20/1988 | EP0263910A1 Hydrometallurgical process for separating and concentrating gold, platinum and palladium, as well as recovering selenium from electrolytic copper refinery slimes and similar non-metallic materials |
| 04/13/1988 | EP0263559A1 Process for working-up soda slags in the desulfurization of pig iron |
| 04/13/1988 | EP0263539A1 Process for treating zinc hydrometallurgy residues |
| 04/12/1988 | US4737187 Method of treating nickel-containing and vanadium-containing residues |
| 04/12/1988 | US4737186 Using carbon dust |
| 03/31/1988 | DE3632660A1 Integrated process for preparing oxidants (oxidizing agents) containing manganese and/or zinc compounds |
| 03/29/1988 | US4734129 Oxidizing lead to form lead oxide slag |
| 03/29/1988 | US4734030 Apparatus for the treatment of flue gases |
| 03/29/1988 | CA1234595A1 System for control of the electroslag remelting |
| 03/22/1988 | US4732606 Process of treating aluminum-containing fused slag |
| 03/09/1988 | CN87102170A Method of treating cemented carbide bodies regarding their compositions and structures |
| 03/01/1988 | US4728505 Leaching in presence of oxidizer |
| 02/24/1988 | EP0256233A2 Process for producing spherical powder particles |
| 02/09/1988 | US4724054 Process for production of aluminum and alkaline earth metal by carbothermic production of alkaline earth metal aluminide and reduction of aluminum and alkaline earth metal in electrolytic reduction cell |
| 02/02/1988 | US4722831 Leaching with hydrochloric acid, leaving gold in residues |
| 02/02/1988 | US4722774 Recovery or arsenic and antimony from spent antimony catalyst |
| 02/02/1988 | CA1232141A1 Treatment of dross |
| 02/02/1988 | CA1232140A1 Process for producing magnesium |
| 01/26/1988 | US4721606 Recovery of metal values from spent catalysts |
| 01/19/1988 | CA1231534A1 Treatment for spent petroleum cracking catalyst |
| 01/12/1988 | US4718939 Recycling superalloy scrap by vapor phase zinc embrittlement |
| 01/12/1988 | US4718559 Process for recovery of non-ferrous metallic concentrate from solid waste |
| 01/05/1988 | US4717419 Method for treating iron-bearing slags containing precious metals, particularly slags created in the smelting process of copper and nickel |
| 12/29/1987 | CA1230734A1 Process for reclamation of high purity selenium from scrap alloys |
| 12/23/1987 | EP0250342A1 Process for recovering aluminium and lithium from metallic scrap |
| 12/15/1987 | US4713223 Dissolving in acid; complexing impurities; precipitating iron |
| 12/08/1987 | US4711662 Stirring with water vapor generated by cecomposing silicate minerals; reducing agent, recovering metals for reuse |
| 11/26/1987 | DE3617410A1 Method of processing old car batteries |
| 11/24/1987 | CA1229487A1 Process for the recovery of silver from a residue essentially free of elemental sulphur |
| 11/19/1987 | DE3609517C1 Process and apparatus for removing mercury from solid mercury-containing materials |
| 11/17/1987 | US4707185 Method of treating the slag from a copper converter |
| 11/11/1987 | EP0244921A2 Method for recovering platinum in a nitric acid plant |
| 11/11/1987 | EP0244910A1 Separation of non-ferrous metals from iron-containing powdery material |
| 11/11/1987 | EP0244901A1 Process for working up small batteries |
| 11/10/1987 | US4705562 Method for working-up waste products containing valuable metals |
| 11/03/1987 | US4704162 Using linear induction motor |
| 11/03/1987 | CA1228846A1 Reclamation of a palladium-tin based electroless plating catalyst from the exhausted catalyst solution and accompanying rinse waters |
| 10/27/1987 | US4702768 Compaction, controlled rate of addition to melt |
| 10/22/1987 | DE3711353A1 Process for treating metal-containing materials |
| 10/22/1987 | DE3612553A1 Method for processing domestic and industrial wastes to form recycled products |
| 10/21/1987 | CN86106560A Separating and recovery method of leftover bits and pieces of silver and copper bimetal |
| 10/20/1987 | US4701261 Contacting with cellular particles to form water-insoluble salts |
| 10/20/1987 | US4701217 Smelting reduction |
| 10/14/1987 | EP0241308A1 Method of removing selected ions from cakes deposited on an EAVF device |
| 10/14/1987 | EP0241149A2 Value recovery from spent alumina-base catalysts |
| 10/06/1987 | CA1227642A1 Process and device for feeding metal into a molten metal bath |
| 09/30/1987 | EP0239227A1 Fluidised bed process for the recovery of finely divided metals |
| 09/29/1987 | US4696457 Means for charging liquid slag to a closed smelting furnace |
| 09/29/1987 | CA1227337A1 Liquefied aluminum recuperation method and device, through compression of hot dross |
| 09/24/1987 | WO1987005635A1 Process and apparatus for introducing metal chips into a molten metal bath thereof |
| 09/22/1987 | US4695447 Destruction of inorganic hazardous wastes |
| 09/22/1987 | CA1227042A1 Magnesium production |
| 09/22/1987 | CA1227017A1 Destruction of toxic chemicals |
| 09/15/1987 | CA1226738A1 Metal scrap reclamation system |
| 09/09/1987 | EP0235414A1 Method of removing mercury in exhaust gases from a waste incinerator |
| 09/08/1987 | US4691900 Metal melting furnace |
| 09/02/1987 | EP0234827A2 Metal recovery process |
| 09/02/1987 | EP0138929B1 Method and device for the recovery of liquid aluminum by compression of hot slag |
| 09/02/1987 | CN87100396A Catalyst recovery process |
| 08/27/1987 | WO1987005052A1 Fluidised bed process for the recovery of finely divided metals |
| 08/25/1987 | US4689178 Method for magnesium sulfate recovery |
| 08/19/1987 | EP0233162A2 Method of treating cemented carbide bodies regarding their compositions and structures |
| 08/18/1987 | US4687559 Extraction using alkali cyanide and carbonate solution |
| 08/18/1987 | US4687514 Process for the recovery of noble metals from solutions |
| 08/05/1987 | EP0230906A2 Process for the recovery of iodine and noble metal catalyst |
| 08/04/1987 | US4684404 Extraction of gold from ores |
| 08/04/1987 | US4684402 Method of waste disposal, and apparatus for the same |
| 08/04/1987 | CA1224927A2 Recovering metals from spent hydroprocessing catalysts |
| 07/28/1987 | CA1224742A1 Method and apparatus for separating a lid from a container |
| 07/22/1987 | CN86100283A Method and equipment for recovering silver from developing liquor of movie film |
| 07/21/1987 | US4681627 Process for preparing an ingot from metal scrap |
| 07/14/1987 | US4680126 Separation and recovery of reusable heavy metal hydroxides from metal finishing wastewaters |
| 07/07/1987 | US4678647 Process for the recovery of gallium and germanium from coal fly ash |
| 07/07/1987 | US4678507 Treatment of dross |
| 07/01/1987 | EP0227024A2 Process for treating dust from the fume cleaner of galvanizing plants |
| 06/30/1987 | US4676909 Process for recovering noble metals from their cyanide complexes |
| 06/30/1987 | US4676742 Preheater for reverberatory melting furnaces |
| 06/23/1987 | US4675048 Electrothermal process and plant for the separation and refining of metal from waste |
| 06/23/1987 | CA1223185A1 Dissolution of noble metals |
| 06/23/1987 | CA1223126A1 Process for recovering zinc from ferrites |
| 06/16/1987 | US4673431 Furnace dust recovery process |
| 06/10/1987 | CN85102966A Combined smoke furnace |
| 06/03/1987 | EP0224343A1 Dross cooling |
| 06/02/1987 | US4670229 Slurrying, oxygen pressurization leaching |
| 06/02/1987 | US4670052 Process for the recovery of gold from a precious metal bearing sludge concentrate |
| 05/27/1987 | CN86105464A Recovery of noble metal values from carbonylation residues using immiscible liquids |
| 05/26/1987 | US4669087 Control system for electroslag remelting |
| 05/26/1987 | CA1222140A1 Method for recovery of zn and pb from iron and steel dust |
| 05/19/1987 | US4666685 Hydrodesulfurization catalyst |
| 05/19/1987 | US4666575 Method of recovering gallium from scrap containing gallium |
| 05/19/1987 | US4666514 Hydrometallurgical process for recovering silver from copper-electrolysis anode sludge |
| 05/13/1987 | EP0221187A1 Method of dissolving and recovering noble metals |
| 05/13/1987 | EP0221136A1 Catalyst recovery process. |
| 05/12/1987 | US4664810 Method of separating heavy metals from complex-forming substances of aminocarboxylic acid type, or salts thereof in aqueous solutions |
| 05/12/1987 | CA1221549A1 Process for metal-enrichment of lead bullion |
| 05/12/1987 | CA1221548A1 Process for recovering metal values from alloy scraps |
| 05/06/1987 | EP0220853A2 System for recovery of salvageable ferrous and non-ferrous metal components from incinerated waste materials |
| 05/05/1987 | US4662936 Method of treating nickel-containing and vanadium-containing residues |
| 05/05/1987 | US4662570 Apparatus for processing refuse to produce steel-making scrap |
| 05/05/1987 | CA1221244A1 Recovering metals from spent hydroprocessing catalysts |