| Patents for C22B 13 - Obtaining lead (1,881) |
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| 12/30/1998 | WO1998059082A1 Method for treating molten lead with calcium |
| 12/30/1998 | WO1998058879A1 A process for the manufacture of pure metallic lead from exhausted batteries |
| 12/30/1998 | WO1998058878A1 Process for the manufacture of lead oxide |
| 12/30/1998 | CN1041439C Lead-antimony directly separating technology for jamesonite |
| 12/23/1998 | EP0819183B1 Treatment of fly ash |
| 12/22/1998 | US5851490 Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams |
| 12/15/1998 | CA2096665C Pyrometallurgical method for recovering volatile metals from sulfidic raw materials |
| 12/08/1998 | CA2036058C Hydrometallurgic method for processing raw materials containing zinc sulphide |
| 11/24/1998 | US5840262 Process for the manufacture of pure lead oxide from exhausted batteries |
| 11/04/1998 | CN1040554C Technology and equipment for coproducing zinc sulfate and lead concentrate |
| 10/29/1998 | WO1998048066A1 Method for utilizing ph control in the recovery of metal and chemical values from industrial waste streams |
| 10/29/1998 | CA2293687A1 Method for utilizing ph control in the recovery of metal and chemical values from industrial waste streams |
| 10/27/1998 | US5827347 Process for the recovery of lead from spent batteries |
| 10/14/1998 | EP0701630B1 Solid bonded oxygen-donor macrocyclic ligands for removing and concentrating metals |
| 08/26/1998 | CN1039594C Reflecting furnace composite method for obtaining lead |
| 08/04/1998 | US5788739 Process for recovering metallic lead from exhausted batteries |
| 08/04/1998 | US5788735 Plasma arc furnaces for pyrolysis and combustion, smelting of soils and forming slags |
| 07/29/1998 | EP0855448A1 Operation of lead/zinc blast furnaces |
| 07/28/1998 | US5785935 Using liquid leachant |
| 06/30/1998 | US5772955 Apparatus for suspension smelting |
| 06/16/1998 | US5766303 Introducing lead-containing hazardous material into hollow electrode of plasma arc furnace to pyrolyze and render non-hazardous |
| 05/26/1998 | US5755889 For separating solder from dross |
| 05/13/1998 | CN1038348C Prodn. of metal from minerals |
| 05/07/1998 | WO1998018971A1 Method for extraction of metals and metal oxides from minerals, industrial by-products and waste materials |
| 05/07/1998 | CA2269937A1 Method for extraction of metals and metal oxides from minerals, industrial by-products and waste materials |
| 04/28/1998 | US5744107 Process for removing heavy metals from soil |
| 02/25/1998 | CN1037531C Method for producing easily volatile metals, such as zinc, lead and cadmium of sulphidic raw materials |
| 01/28/1998 | EP0821071A1 Vacuum treatment of dust exhausted from iron and steel melting furnace for recovery of lead and zinc |
| 01/21/1998 | EP0819183A1 Treatment of fly ash |
| 12/17/1997 | EP0812923A1 Improved method for the recovery of lead from exhausted lead acid storage batteries |
| 12/17/1997 | CN1167833A Integrated recovery of Pb and Sn as valuable metal from chloride slag |
| 12/11/1997 | WO1997046722A1 Recovery of iron products from waste material streams |
| 12/11/1997 | CA2257910A1 Recovery of iron products from waste material streams |
| 12/03/1997 | EP0625216B1 Process for remediation of lead-contaminated soil and waste battery casings |
| 11/27/1997 | WO1997044500A1 Treatment of fly ash/apc residues including lead salt recovery |
| 11/27/1997 | CA2253644A1 Treatment of fly ash/apc residues including lead salt recovery |
| 11/26/1997 | CN1165866A Pb cleaning and reclaiming method from waste storage battery |
| 11/25/1997 | US5690718 Low energy process for recovering lead dioxide and lead monoxide which can be used in new battery manufacture |
| 11/19/1997 | CN1165114A Regeneration method for storage battery desulfurizing agent |
| 11/04/1997 | US5683488 Method for producing an iron feedstock from industrial furnace waste streams |
| 10/29/1997 | EP0619764B1 Process for removing heavy metals from soils |
| 10/15/1997 | EP0800590A1 Process and device for separating a specifically lighter phase from a specifically heavier liquid phase |
| 10/08/1997 | EP0698127B1 Recovery of metals from sulphidic material |
| 09/10/1997 | CN1158904A Recovering method of platinum and lead in anode sludge from electrolytic hydrogen peroxide solution production |
| 08/26/1997 | US5660806 Deleading by leaching, dissolving in hydrochloric acid or sulfuric acid and a salt of alkali metal, alkaline earth metal or ammonium, recovering from liquid phase |
| 08/21/1997 | WO1997030182A1 Zinc oxide-containing waste processing method |
| 08/05/1997 | CA1339191C Method for making low alpha count lead |
| 07/15/1997 | US5647876 Method of removing volatile metals from slag using an acid wash |
| 07/02/1997 | EP0781352A1 Solder recovery |
| 05/20/1997 | US5630931 Process for the hydrometallurgical and electrochemical treatment of the active mass of exhausted lead batteries, to obtain electrolytic lead and elemental sulphur |
| 05/06/1997 | CA2087878C Gasifier burner for powdered solid fuels and method for using the same |
| 04/30/1997 | CN1148627A Lead-antimony directly separating technology for jamesonite |
| 04/23/1997 | EP0685001B1 Process for the treatment of electric arc furnace dust |
| 04/10/1997 | WO1997012998A1 Battery paste recycling process |
| 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 | CA2039687C Method for operation of flash smelting furnace |
| 03/19/1997 | EP0701630A4 Process for removing, separating, and concentrating metals |
| 03/04/1997 | US5607495 Oxygen smelting of copper or nickel sulfides |
| 02/26/1997 | CN1143980A Solder recovery |
| 02/18/1997 | US5603890 Silver reduction assembly including a hollow coil of screen material formed of a metal that is above silver in electromotive force series; for precipitating silver as metal from photographic solutions |
| 12/11/1996 | CN1033501C Process and device for removing lead, cadmium and zinc from dusts |
| 12/04/1996 | EP0745692A1 Method and apparatus of treating dusts containing oxides |
| 12/04/1996 | EP0745439A2 Process for removing heavy metals from soil |
| 12/04/1996 | EP0745438A2 Process for removing heavy metals from soil |
| 11/20/1996 | EP0641394B1 Oxygen smelting |
| 10/15/1996 | US5565016 Method for suspension smelting |
| 10/10/1996 | WO1996031631A1 Treatment of fly ash |
| 10/10/1996 | CA2217350A1 Treatment of fly ash |
| 09/25/1996 | CN1131699A Lead smelting technology |
| 09/17/1996 | US5556447 Detoxification of mercury contaminated soils with vaporization, contacting with carbon, separation and recovering mercury by heating, purging and condensing |
| 08/20/1996 | US5547490 Heat-vaporizing of lead compounds leaves zinc-containing residues which are chemically reduced to zinc vapors, then cooling, filtration |
| 07/31/1996 | EP0724306A1 Process for the hydrometallurgical and electrochemical treatment of the active mass of exhausted lead batteries, to obtain electrolytic lead and elemental sulphur |
| 07/26/1996 | CA2141099A1 Process for the hydrometallurgical and electrochemical treatment of the active mass of exhausted lead batteries, to obtain electrolytic lead and elemental sulphur |
| 07/11/1996 | WO1996021049A1 Process and device for separating a specifically lighter phase from a specifically heavier liquid phase |
| 07/10/1996 | CN1126499A Process for removing, separating, and concentrating metals |
| 07/10/1996 | CN1126498A Recovery of metals from sulphidic material |
| 06/12/1996 | CN1124297A Technique for producing metal by directly smelting sulphide ore |
| 06/05/1996 | EP0632843B1 Process for removing lead and zinc from metallurgical-works dust |
| 04/24/1996 | CN1031651C Process for refining bismuth |
| 04/09/1996 | US5505925 Process for removing heavy metals from soil |
| 03/20/1996 | EP0701630A1 Solid bonded oxygen-donor macrocyclic ligands for removing and concentrating metals |
| 02/28/1996 | EP0698127A1 Recovery of metals from sulphidic material |
| 02/27/1996 | US5494649 Leaching copper, lead and tin with methanesulfonic acid |
| 02/22/1996 | DE19500266C1 Method of separating a heavy liquid phase from a light liquid phase |
| 01/30/1996 | US5487819 Production of metals from minerals |
| 01/16/1996 | CA2012981C Removal of arsenic, tin and antimony from crude lead containing silver |
| 12/12/1995 | US5474592 Method of reprocessing metallurgical residues, which contain zinc and lead |
| 12/06/1995 | EP0685001A1 Process for the treatment of electric arc furnace dust. |
| 12/05/1995 | US5472176 Silver recovery device |
| 11/29/1995 | CN1030400C Process of reducing nonferrous metal oxides in slags |
| 11/21/1995 | CA1337579C Method for the refining of lead |
| 11/21/1995 | CA1337578C Method for removing thallium from pig-lead and high-purity lead |
| 11/14/1995 | US5467365 Evolution of SO2, reduction of lead oxide slag with carbon |
| 09/28/1995 | WO1995025823A1 Solder recovery |
| 09/28/1995 | DE4426834A1 Method and appts. for separating a plastic material with embedded metal particles into its metal and plastic constituents |
| 09/20/1995 | CN1108701A Reflecting furnace complication method for obtaining lead |
| 09/19/1995 | US5451382 Process and plant for removing lead, cadmium and zinc from dusts |
| 09/19/1995 | US5451247 Process for removing tin, arsenic and antimony from molten lead |
| 09/06/1995 | CN1107895A Technology and equipment for coproducing zinc sulfate and lead concentrate |