| Patents for C22B 25 - Obtaining tin (604) |
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| 05/13/1992 | EP0257058B1 Process for regenerating solder stripping solutions |
| 03/03/1992 | CA1296531C Chlorination of ores containing alkali or alkaline earth values |
| 01/30/1992 | DE4110324C1 Pressing of tin plate scrap - involves immersion in molten sodium followed by electrolysis avoiding waste water contamination |
| 11/13/1991 | EP0220198B1 Preparing metal compounds by pyrolysis |
| 09/25/1991 | EP0240507B1 Chlorination of ores containing alkali or alkaline earth values |
| 11/14/1990 | EP0397327A1 Process for dissolving tin and tin alloys |
| 09/11/1990 | CA1273804A1 Extraction of tins from its ores |
| 08/08/1990 | CN1009078B Extraction of tin from its ores |
| 03/06/1990 | US4906493 Method of preparing coatings of metal carbides and the like |
| 01/23/1990 | US4895709 Low temperature pyrolysis |
| 05/24/1989 | CN2038108U Equipment of dearsenifying and desulphurization by ebulient roasting for the concentrate tin ore |
| 05/18/1989 | WO1989004379A1 Microwave irradiation of mineral ores and concentrates |
| 05/02/1989 | US4826666 Method of preparing metal carbides and the like and precursors used in such method |
| 01/17/1989 | US4798708 Process for recovering chromium and other metal values from chromium bearing material |
| 12/06/1988 | US4789534 Pyroysis of metal amide |
| 11/30/1988 | CN88101986A High-temp. chlorination method for refractory mineral in tin ore |
| 11/15/1988 | CA1244655A1 Method for recovering the valuable metal content of contaminated copper raw material |
| 10/26/1988 | CN87209402U Internal-heating multiple-stage continuously-distilling vacuum furnace |
| 10/18/1988 | CA1243272A1 Process for the deposition of metals on semiconductor powders |
| 08/03/1988 | CN87100487A Blast furnace smelting for lead-tin paragenetic mineral |
| 07/26/1988 | CA1239613A1 Recovery of tin from starting material and low tin concentrates by melting with potassium hydroxide |
| 04/12/1988 | US4737351 Process for the recovery of tin |
| 02/23/1988 | CA1233027A1 Method for recovering the metal values from materials containing tin and/or zinc |
| 11/11/1987 | EP0244433A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 11/03/1987 | CA1228846A1 Reclamation of a palladium-tin based electroless plating catalyst from the exhausted catalyst solution and accompanying rinse waters |
| 07/30/1987 | WO1987004451A1 Process for regenerating solder stripping solutions |
| 06/16/1987 | US4673521 Process for regenerating solder stripping solutions |
| 06/10/1987 | CN85106774A Technology and installation of continuous smelting of tin in a reverberatory furnace |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 04/23/1987 | DE3539164C1 Process and smelting furnace for producing non-ferrous metals |
| 04/09/1987 | WO1987002068A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 04/01/1987 | CN85107124A Method for directly extracting metal tin from low-grade tin ore |
| 04/01/1987 | CN85107123A To refine tin with brown coal |
| 03/24/1987 | US4652434 Chlorination of ores containing alkali or alkaline earth values |
| 02/12/1987 | WO1987000826A1 Chlorination of ores containing alkali or alkaline earth values |
| 01/20/1987 | US4638074 Extraction of tin from its ores |
| 01/10/1987 | CN85101919A Method for recovering the metal values from materials containing tin and/or zinc |
| 01/10/1987 | CN85101168A Process for producing tin from lean tin oxides or raw oxides-suephides/concentrates |
| 11/18/1986 | CA1214045A1 Process for the recovery of indium and tin |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 11/05/1986 | CN85103836A Method for extracting tin from molten iron |
| 10/28/1986 | US4619838 Process for the deposition of metals on semiconductor powders |
| 09/03/1986 | CN85108534A Extraction process of tin from copper-smelting sludge |
| 09/03/1986 | CN85107356A Method and apparatus for separation of lead and bismuth in tin refinement |
| 08/27/1986 | EP0192334A1 Extraction of tin from its ores |
| 08/26/1986 | US4608083 Method for recovering the valuable metal content of contaminated copper raw material |
| 07/23/1986 | CN86101062A Extraction of tin from its ores |
| 07/15/1986 | US4600699 Reclamation of a palladium-tin based electroless plating catalyst from the exhausted catalyst solution and accompanying rinse waters |
| 04/09/1986 | EP0177471A1 A method for recovering the valuable metal content of contaminated copper raw material |
| 02/18/1986 | US4571260 Smelting under oxidizing conditions then reduction |
| 01/02/1986 | EP0166709A1 Process for recovering tin |
| 12/17/1985 | US4559237 Process for the deposition of metals on semiconductor powders |
| 12/11/1985 | EP0163876A1 Process for depositing metals on semiconducting powders |
| 09/04/1985 | EP0153914A1 A method for recovering the metal values from materials containing tin and/or zinc |
| 04/10/1985 | EP0136331A1 Reclamation of a palladium-tin based electroless plating catalyst from the exhausted catalyst solution and accompanying rinse waters |
| 08/16/1984 | WO1984003057A1 Reclamation of a palladium-tin based electroless plating catalyst from the exhausted catalyst solution and accompanying rinse waters |
| 06/19/1984 | CA1169247A1 Apparatus for refining molten aluminum |
| 10/18/1983 | US4410358 Plasma recovery of tin from smelter dust |
| 09/13/1983 | US4404027 Method of recovering heavy metals |
| 08/02/1983 | CA1150953A1 Liquid-liquid extraction of metal values from aqueous solution |
| 07/27/1983 | EP0084517A1 Process for depositing metals on semi-conductive powders |
| 05/10/1983 | US4382856 Recovery of tin |
| 04/20/1983 | EP0077190A2 Method and apparatus for the smelting and fuming of tin concentrates |
| 02/15/1983 | CA1141168A1 Method of improving the performance of submerged oxygen injectors |
| 09/22/1982 | EP0060826A1 Method of recovering heavy metals |
| 08/31/1982 | CA1130573A1 Method and apparatus for refining molten raw metals, more particularly lead or zinc |
| 06/29/1982 | CA1126508A1 Method and apparatus for the continuous recovery of heavy-metal phases |
| 06/15/1982 | US4334918 Method of recovering non-ferrous metals from their sulphide ores |
| 06/15/1982 | US4334664 Apparatus for recovering tin from tin dross |
| 10/28/1981 | EP0038608A1 Apparatus for refining molten metal |
| 09/22/1981 | US4290588 Apparatus for refining molten aluminum |
| 08/11/1981 | US4283224 Containing precious metals, tin dioxide, lead sulfate by complexing, carbonating, leaching the solid residue, ion exchanging |
| 08/11/1981 | US4283045 Apparatus for the continuous recovery of tin from iron rich concentrates |
| 06/23/1981 | US4274868 Oxidation, sulfiding |
| 05/13/1981 | EP0028570A1 Process for refining a molten metal by oxygen injection |
| 02/11/1981 | EP0023729A1 Process for detinning tin coated scrap |
| 02/04/1981 | EP0023428A1 Liquid-liquid process for extracting metals using organo-phosphorous compounds |
| 12/02/1980 | US4236916 Method for the continuous recovery of tin from iron rich concentrates |
| 11/18/1980 | CA1089649A1 Reduction of metal oxides to sponge metal |
| 10/21/1980 | CA1087861A1 Recovery of valuable metals and compounds thereof contained in molten slag |
| 10/14/1980 | US4227922 Recovering scrap metals such as tin |
| 10/07/1980 | CA1086956A1 Method and apparatus for gaseous reduction of metal ores |
| 10/01/1980 | EP0016595A1 A method of recovering non-ferrous metals from their sulphide ores |
| 09/30/1980 | US4225342 Treatment of zinc plant leach residues for recovery of the contained metal values |
| 08/05/1980 | US4216187 Oxidation with nitric acid |
| 07/15/1980 | US4212666 Tin recovery |
| 07/01/1980 | US4210441 Method for the continuous or discontinuous treatment of molten slag, particularly with contents of heavy metal oxides, for the recovery of portions contained therein of valuable metals or their combinations, respectively |
| 04/30/1980 | EP0010365A1 Treatment of zinc plant leach residues for recovery of the contained metal values |
| 02/05/1980 | CA1071136A1 Method for the electrolytic recovery of sb, as, hg and/or sn |
| 08/14/1979 | US4164542 Use of sodium hydroxide and sodium nitrate or nitrite, formation of sodium stannate |
| 05/08/1979 | US4153450 Flow and composition of reducing gas |
| 12/12/1978 | US4129440 Expansion, elutriation, pulping, comminution, pyrolysis |
| 10/10/1978 | US4119136 Melting |
| 09/12/1978 | US4113106 Process of tin flotation |
| 07/11/1978 | US4099962 Method and apparatus for measuring and controlling the percentage reduction of ore in a moving bed gaseous reduction reactor |
| 05/09/1978 | US4088310 Apparatus for suspension smelting of finely-grained oxide and/or sulfide ores and concentrates |
| 04/25/1978 | US4086083 Recovering material |
| 09/13/1977 | US4047938 Process for refining molten metal |
| 09/06/1977 | US4046556 Direct gaseous reduction of oxidic metal ores with dual temperature cooling of the reduced product |
| 06/07/1977 | US4027861 Apparatus for continuous vacuum-refining of metals |