| 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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| 01/23/1990 | US4895596 Reduction, precipitation |
| 01/23/1990 | US4895594 Or pig iron, sub-stoichiometric burners, combustion, discharging, ladles, tapholes, preferential, rotation |
| 01/18/1990 | DE3823573A1 Process for the utilisation of materials containing iron oxides and compounds of non-ferrous heavy metals |
| 01/17/1990 | CN1038843A Method of iron removing in the process of cadmium extraction |
| 01/03/1990 | EP0349167A2 Method of desulfurizing molten metal in a plasma fired cupola |
| 01/02/1990 | US4891130 Process for removing metals from aluminosilicate materials |
| 01/02/1990 | US4891067 Processes for the treatment of smelter flue dust |
| 01/02/1990 | US4891061 Process for treating speiss |
| 12/27/1989 | CN1038315A Process for recovering lead from exhausted accumulator |
| 12/26/1989 | US4889556 Method of recycling steel belted tires |
| 12/26/1989 | US4889555 Heating in inert atmosphere, pressing, cooling, recycling fines |
| 12/21/1989 | DE3820500A1 Process for concentrating the gallium present in bauxites |
| 12/20/1989 | CN1038077A Technology for silver recovery from silver contg. waste liquor and apparatus thereof |
| 12/19/1989 | US4888053 Chloride leaching of iron-based, heavy metal-containing sludges |
| 12/13/1989 | EP0200743B1 Destruction of toxic chemicals |
| 12/07/1989 | DE3818075A1 Process for preventing emissions from hot zinc ashes |
| 12/07/1989 | DE3817845A1 Process for the pollution-free immobilization of dust, which contains water-soluble compounds polluting the environment, from steelworks dedusting installations |
| 11/30/1989 | WO1989011550A1 Anti-theft measures |
| 11/28/1989 | CA1263365A1 Catalyst recovery process |
| 11/14/1989 | US4880685 Pollution control, heat treatment |
| 11/08/1989 | EP0340644A1 Process for the removal and recycling of waste materials |
| 11/07/1989 | US4878943 Iron oxide reduction, sponge iron, cooling, dedusting |
| 11/02/1989 | DE3906869C1 Process for producing a concentrate enrichment of metals or oxides thereof from filter dusts by expelling them from the filter dusts in their vapour form and thus collecting them in concentrated form |
| 11/01/1989 | CN1036798A Process for utilizing of zinc-containing metallurgical dusts and sludges |
| 10/31/1989 | US4877449 Vertical shaft melting furnace and method of melting |
| 10/25/1989 | EP0338990A2 Process for desilverising fixing baths containing iodide |
| 10/25/1989 | EP0338719A1 A process for the separation of sodium and calcium from sodium sludge |
| 10/24/1989 | US4876386 Process for the oxidation of di- or trimethylbenzenes in the presence of cobalt and manganese from oxidation residue incinerator ash |
| 10/24/1989 | US4876232 Phenanthroline on carbon or charcoal support |
| 10/17/1989 | US4874599 Magnesium fluoride recovery method |
| 10/17/1989 | US4874486 Pyrolysis; electrolysis of slag; separation |
| 10/17/1989 | US4874429 Hydrometallurgical process for the recovery of silver from copper electrolysis anode sludge |
| 10/11/1989 | EP0336923A2 Process for valorization of zinciferous flue dusts and muds |
| 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 |
| 10/05/1989 | DE3809883A1 Process for producing pelleted fly ash |
| 10/04/1989 | EP0335033A2 Method for treating ash and dust from incineration plants |
| 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 |
| 09/26/1989 | US4870655 Apparatus for recovery of metallics and non-metallics from spent catalysts |
| 09/26/1989 | CA1261145A2 Recovery of non-ferrous metals from dross |
| 09/20/1989 | CN1035681A Alloy substituting bismuth for inoculated cast iron |
| 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 | CA1259471A1 Catalyst recovery process |
| 09/11/1989 | EP0335971A4 Supported heteropolycyclic compounds in the separation and removal of late transition metals. |
| 09/06/1989 | EP0330872A2 Method for continuous agglomeration of heavy metals contained in incinerator ash |
| 08/29/1989 | US4861565 Method of separately recovering metal values of petroleum refining catalyst |
| 08/23/1989 | EP0329638A1 Treatment and disposal of skims, salt slags and aluminium-containing scraps |
| 08/23/1989 | EP0214268B1 A method for working-up waste products containing valuable metals |
| 08/16/1989 | EP0327851A2 Method for recovering casting refractory compositions from investment casting slurries and from cores |
| 08/08/1989 | US4854946 Method for treating blast furnace gas and apparatus for carrying out that method |
| 08/01/1989 | US4853033 Method of desulfurizing molten metal in a plasma fired cupola |
| 07/27/1989 | WO1989006668A1 Process for treating colloidal solutions of lacquer sludges |
| 07/26/1989 | EP0324916A1 Process for upgrading solutions of lacquer sludges |
| 07/26/1989 | EP0221136B1 Catalyst recovery process |
| 07/26/1989 | CN1034227A Metallurgy process for reclaiming non-ferrous metallic foil and tinsel |
| 07/20/1989 | DE3800616A1 Process for eliminating heavy metals from aged, alkaline waste solutions, solutions, sludges, suspensions and waste solids, with processing of heavy metals to give marketable products or for safe landfilling |
| 07/19/1989 | CN1034053A Method of and apparatus for melting metal waste |
| 07/18/1989 | US4848250 Exothermic reaction producing thermal energy, metal and slag |
| 07/12/1989 | CN1033748A Recovery of noble metals |
| 07/05/1989 | EP0176536B1 Apparatus for and a method of removing material |
| 06/28/1989 | EP0322207A2 Recovery of non-ferrous metals from dross |
| 06/28/1989 | CN1033529A Process for continuously melting scrap as well as apparatus for performing this process |
| 06/27/1989 | US4842255 Dross cooling apparatus |
| 06/21/1989 | EP0321443A2 Process and installation for continuously melting scrap |
| 06/21/1989 | EP0320682A2 Process for the production of titanium dioxide |
| 06/21/1989 | EP0320587A1 Process and apparatus for melting scrap metal |
| 06/20/1989 | US4840671 Process for chemical stabilization of heavy metal bearing dusts and sludges as EAF dust |
| 06/20/1989 | US4840314 Treatment of mercurial waste |
| 06/20/1989 | CA1336478B Recovery of Non-Ferrous Metals from Dross |
| 06/20/1989 | CA1255914A1 Recovery of non-ferrous metals from dross |
| 06/15/1989 | DE3740680A1 Process for leaching metals from sludge, mud, ores and industrial waste |
| 06/14/1989 | EP0211016B1 Apparatus for the treatment of flue gases |
| 06/08/1989 | DE3805418C1 Process for mechanically recovering copper from blown brass dusts |
| 06/07/1989 | EP0319385A1 Device and process for trapping gaseous compounds of refractory metals and pumping plant containing the device |
| 06/06/1989 | US4836847 Method for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 06/01/1989 | WO1989004811A1 Method for the processing of fly ash, scrubber sludge and the like; and products recovered therefrom |
| 05/31/1989 | CN1033196A Recovery technique of zinc oxide by treatment of dust during smelting of copper from copper ash |
| 05/30/1989 | US4834951 Common separation of contaminating elements from electrolyte solutions of valuable metals |
| 05/24/1989 | CN1033099A Improved stove |
| 05/23/1989 | US4831943 Treating ash and dust from incineration plants by coprocessing with hazardous waste and/or metallic scrap |
| 05/17/1989 | EP0316299A2 Process of dezincifying a material flow operating a pig-iron production plant |
| 05/09/1989 | US4828661 Process for recovery of metals from metal/plastic waste |
| 05/09/1989 | US4828607 Replacement of coke in plasma-fired cupola |
| 05/03/1989 | EP0314404A1 Improvements in or relating to furnaces |
| 05/03/1989 | EP0314352A1 Recovery of noble metals |
| 05/03/1989 | EP0313902A1 Method for separating poisonous, volatile chemical compounds from mixtures of solid particles with a size smaller than 200 microns |
| 04/27/1989 | DE3816697C1 Process for recovering rare metals |
| 04/27/1989 | DE3734892A1 Process for dressing metallurgical dusts |
| 04/20/1989 | WO1989003434A1 Supported heteropolycyclic compounds in the separation and removal of late transition metals |
| 04/18/1989 | US4822412 Method of removing lithium from aluminum-lithium alloys |
| 04/18/1989 | US4822410 Reclamation of metals by flash direct reduction |
| 04/11/1989 | US4820340 Reduction to form metal vapors, oxidation of vapors, recovery of zinc, lead |
| 04/06/1989 | DE3732242A1 Process for treating residues containing non-ferrous metals |
| 04/05/1989 | EP0310563A1 Process for the electrochemical separation of metal mixtures and alloys |
| 04/05/1989 | CN1003788B Method of comprehensive use of furnace cinder for producing al2o3 with concentrated hcl |
| 04/04/1989 | US4818282 Method for recovering metal-carbide scrap by alloying |
| 03/29/1989 | EP0309016A1 Process for making briquettes without binders, from steel plant dusts |
| 03/28/1989 | US4816235 Silver and manganese recovery using acidified thiourea |
| 03/28/1989 | US4815516 Method for recovering casting refractory compositions from investment casting shell molds |