| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 07/23/1997 | EP0784709A1 Recovery of zinc from sulphidic concentrates |
| 07/22/1997 | US5650057 Chloride assisted hydrometallurgical extraction of metal |
| 07/17/1997 | WO1997025447A1 Method for recovering heavy metals from acid and ammonia solutions |
| 07/16/1997 | EP0783593A1 Method for recovering metal and chemical values |
| 07/15/1997 | US5647876 Method of removing volatile metals from slag using an acid wash |
| 07/08/1997 | US5645708 Chloride assisted hydrometallurgical copper extraction |
| 06/19/1997 | WO1997021628A1 Process for simultaneously preparing anhydrous aluminum chloride and zinc |
| 06/04/1997 | EP0776378A1 Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 05/22/1997 | WO1997018338A1 Method of processing finely divided material incorporating metal based constituents |
| 05/22/1997 | CA2237874A1 Method of processing finely divided material incorporating metal based constituents |
| 05/14/1997 | EP0773301A1 Hydrometallurgical treatment for the purification of waelz oxides through lixiviation with sodium carbonate |
| 05/14/1997 | EP0637992B1 Condensation of metal vapours in a fluidized bed |
| 05/07/1997 | EP0771370A1 Process for electrochemically dissolving a metal such as zinc or tin |
| 05/06/1997 | CA2087878C Gasifier burner for powdered solid fuels and method for using the same |
| 04/23/1997 | EP0719347B1 Method for removing zinc from sulphured concentrates |
| 04/09/1997 | EP0766749A1 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 04/02/1997 | EP0765944A1 Method of removing volatile metals from gasification slag particles using an acid wash |
| 03/27/1997 | CA2180308A1 Method of removing volatile metals from slag using an acid wash |
| 03/25/1997 | CA2041066C One step process for the treatment of parkes desilvering crust to recover zinc and produce a suitable feed for cupellation |
| 03/12/1997 | EP0621855B1 Method for the recovery of zinc oxide |
| 03/05/1997 | EP0557312B1 Direct sulphidization fuming of zinc |
| 03/04/1997 | US5607495 Oxygen smelting of copper or nickel sulfides |
| 02/20/1997 | WO1997006283A1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 02/20/1997 | WO1997006215A1 Method for preparing inorganic pigments, resulting inorganic pigments, and apparatus therefor |
| 02/20/1997 | CA2229058A1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 02/20/1997 | CA2228562A1 A method of preparing inorganic pigments, inorganic pigments obtained thereby, and an installation for implementing such a method |
| 02/13/1997 | WO1996041029A3 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 01/15/1997 | EP0650384B1 Treatment of polyvinylchloride |
| 01/03/1997 | WO1997000333A1 The processing of zinc bearing materials in a dc arc furnace |
| 01/01/1997 | CN2244053Y Zinc gasifying furnace |
| 12/19/1996 | WO1996041029A2 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 12/19/1996 | WO1996041027A1 Chloride assisted hydrometallurgical extraction of metal |
| 12/19/1996 | WO1996041026A1 Chloride assisted hydrometallurgical extraction of metal |
| 12/19/1996 | CA2456772A1 Chloride assisted hydrometallurgical extraction of metal |
| 12/17/1996 | US5585079 Dissolving zinc ferrite and zinc oxide in sulfuric acid without dissolving the zinc silicate, reducing silicate residue with coal in furnace to produce iron silicate slag |
| 12/11/1996 | CN1033501C Process and device for removing lead, cadmium and zinc from dusts |
| 12/10/1996 | US5582631 Combining with iron-poor material such as exhaust fumes; treating with ammonium chloride leaching solution; separation; roasting |
| 12/05/1996 | WO1996038381A1 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 12/04/1996 | EP0745692A1 Method and apparatus of treating dusts containing oxides |
| 11/21/1996 | WO1996036743A1 Method and device for treating metal-containing dusts arising from thermal metallurgical processes |
| 11/20/1996 | EP0641394B1 Oxygen smelting |
| 11/07/1996 | WO1996034987A1 Process for recovering metals from iron oxide bearing masses |
| 11/07/1996 | CA2219415A1 Process for recovering metals from iron oxide bearing masses |
| 11/06/1996 | EP0741192A1 Method for working up zinc and iron oxide bearing residual material |
| 11/06/1996 | CA2175742A1 Method of reprocessing zinc- and iron oxide-containing residual material |
| 11/05/1996 | US5571306 Feedstock for steel making |
| 10/23/1996 | EP0689615B1 Method of recovering zinc |
| 10/22/1996 | US5567225 Method of making pig iron with zinc recovery |
| 10/17/1996 | WO1996032512A1 Hydrometallurgical treatment for the purification of waelz oxides through lixiviation with sodium carbonate |
| 10/16/1996 | EP0677118B1 Hydrometallurgical recovery of metals from complex ores |
| 10/10/1996 | WO1996031631A1 Treatment of fly ash |
| 10/10/1996 | CA2217350A1 Treatment of fly ash |
| 09/26/1996 | WO1996029439A1 Atmospheric mineral leaching process |
| 09/18/1996 | EP0731805A1 Amides of acids of phosphorus for the extraction of metals |
| 09/18/1996 | CN1131441A Method for removing zinc from sulphured concentrates |
| 09/12/1996 | WO1996027556A1 Purification of metal containing solutions |
| 09/10/1996 | US5554294 Method for dissolving sludge and recovering constituents therefrom |
| 08/28/1996 | CN1032657C Controlling pollution method for wet process of smelting Mn or Zn by increasing or decreasing pressure |
| 08/21/1996 | EP0727499A1 Method for removing at least one coating from metal scrap parts |
| 08/20/1996 | US5547490 Heat-vaporizing of lead compounds leaves zinc-containing residues which are chemically reduced to zinc vapors, then cooling, filtration |
| 07/30/1996 | US5540751 Method for recovering zinc from zinc containing dust |
| 07/23/1996 | US5538532 Methods for recycling electric arc furnace dust |
| 07/23/1996 | CA2008063C Hydrometallurgical leaching process and apparatus |
| 07/10/1996 | CN1126498A Recovery of metals from sulphidic material |
| 07/03/1996 | EP0719347A1 Method for removing zinc from sulphured concentrates |
| 06/27/1996 | WO1996019593A1 Chloride assisted hydrometallurgical copper extraction |
| 06/12/1996 | CN1124297A Technique for producing metal by directly smelting sulphide ore |
| 06/12/1996 | CN1124227A Technology and equipment for producing ultramicro metallic oxide |
| 06/11/1996 | CA1338370C Process for recovering non-ferrous metal values, especially nickel, cobalt, copper and zinc, by using melt and melt coating sulphation, from raw materials containing said metals |
| 06/06/1996 | WO1996017090A1 Method for producing iron feedstock |
| 06/06/1996 | CA2206555A1 Method for producing iron feedstock |
| 06/05/1996 | EP0632843B1 Process for removing lead and zinc from metallurgical-works dust |
| 05/23/1996 | WO1996015279A1 Processing of sulphides |
| 05/17/1996 | WO1996014438A1 Recovery of zinc from sulphidic concentrates |
| 05/09/1996 | DE4091460C2 Zinc vapour absorption in molten lead |
| 05/01/1996 | EP0709472A1 Method for Waelz treatment of metalliferous sludge |
| 05/01/1996 | CN1121497A Graphite, silicon carbide rotator and making method |
| 04/24/1996 | CN1121046A Process and equipment for preparation of superfine zinc oxide |
| 04/17/1996 | EP0613587B1 Method of processing used batteries |
| 04/17/1996 | CN1120692A Keys arrangement of Chinese character basic strokes input method |
| 04/17/1996 | CN1120655A Dezincing induction melting system |
| 04/17/1996 | CN1120591A Method for prepn. of zinc oxide from zinc containing material |
| 04/10/1996 | CN1120355A Hydrometallurgical recovery of metals from complex ores |
| 03/26/1996 | US5502250 Bis(dialkylthiophosphoryl)amines as metal extractants |
| 03/21/1996 | WO1996008585A1 Method for recovering metal and chemical values |
| 03/20/1996 | EP0511973B1 Metal recovery |
| 03/12/1996 | CA1338126C Continuous feed shaft retort process and apparatus for recovery of non ferrous metals |
| 02/28/1996 | EP0698127A1 Recovery of metals from sulphidic material |
| 02/22/1996 | WO1996005329A1 Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 02/01/1996 | WO1996002689A1 Process for electrochemically dissolving a metal such as zinc or tin |
| 02/01/1996 | CA2195460A1 Process for electrochemically dissolving a metal such as zinc or tin |
| 01/30/1996 | US5487819 Production of metals from minerals |
| 01/18/1996 | DE4429869C1 Reprocessing zinc@ rich amalgams with low residual mercury@ |
| 01/18/1996 | DE19525389A1 Zinc-removal induction melting system |
| 01/16/1996 | US5484579 One step, continuous process for conversion of sulfides to recoverable sulfates |
| 01/09/1996 | US5482534 Precipitation of iron and arsenic as ferric arsenate and extraction |
| 01/04/1996 | WO1996000309A1 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 01/04/1996 | DE4421932A1 Verfahren von kohlenwasserstofflöslichen Aminomethylenphosphonsäure-Derivaten zur solventextraktiven Abtrennung von Eisenionen aus wäßrigen Lösungen A method of hydrocarbon-soluble aminomethylenephosphonic acid derivatives for the solvent extraction of iron ions from aqueous solutions |
| 01/04/1996 | CA2193726A1 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 01/03/1996 | EP0689615A1 Method of recovering zinc |