US5336474A Process for leaching of precious metals
Google Patents A process is disclosed for the leaching of gold and silver from ores and ore concentrates through intimate contact of the ore or ore concentrate with an aqueous leach solution
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process leaching patents Birthing Naturally
US Patent 4,980,134. Leaching process Leaching process Abstract. Noble metals, particularly gold, are recovered from ores by a leaching process in which a slurry of ground ore containing an oxidant and a Get Price Patent US4268188 Process for reducing Patents Try the new Google Patents, with machineclassified Google Scholar results, and Japanese and South Korean patents
Leaching platinum group metals in a sulfuric acid/chloride
Abstract A leaching process was established based on the ability of platinum group metals to form stableplexes in acidic chloride solutions.
Selective recovery of base metals and precious US Patent
United States Patent : 4,423,011: Baglin , et al. December 27, 1983 Selective recovery of base metals and precious metals from ores Abstract. Metal values are recovered from ore concentrates by forming a sulfide matte, grinding the matte, leaching with sulfuric acid at elevated temperature to selectively extract nickel and iron, and leaching the residue with an acidic aqueous ferric or cupric
Process forponents of a PEM fuel cell
Simplified process for leaching precious metals from fuel cell membrane electrode assemblies Patent Shore, Lawrence Matlin, Ramail The membrane electrode assemblies of fuel cells are recycled to recover the catalyst precious metals from the assemblies.
PROCESS FOR ACIDIC LEACHING OF PRECIOUS AND
A process for recovery of one or more elements, selected from precious metals and chalcophile metals as herein defined, from materials containing precious and/or chalcophile metal/s, said process including: i a leachingprising contacting the material with an acidic solution containing aprising an aqueous amino acidpound formed from an
Bacterio electric leaching of metals Patent DOE Patents
Simplified process for leaching precious metals from fuel cell membrane electrode assemblies Patent Shore, Lawrence Matlin, Ramail The membrane electrode assemblies of fuel cells are recycled to recover the catalyst precious metals from the assemblies.
METHOD FOR RECOVERING RARE METALS IN A ZINC LEACHING PROCESS
METHOD FOR RECOVERING RARE METALS IN A ZINC LEACHING PROCESS FIELD OF THE INVENTION Sulphidic zinc concentrate usually also includes small amounts of rare metals such as indium and gallium. If the content of these metals in the raw material is sufficiently high, their recovery may be economically worthwhile. In the method according to the invention the recovery of indium and
Aqueous solution for leaching precious metals options
In U.S. patent 4439235 Simpson describes the process of extracting precious metals from carbonaceous crushed ores, in accordance with which the crushed ore is in contact with an aqueous solution of hypochlorite ion VC is yaytsa etching solution iodotope potassium and iodine, and metal is extracted from the solution by adding anponent, mainly
Selective recovery of base metals and precious US Patent
United States Patent : 4,423,011: Baglin , et al. December 27, 1983 Selective recovery of base metals and precious metals from ores Abstract. Metal values are recovered from ore concentrates by forming a sulfide matte, grinding the matte, leaching with sulfuric acid at elevated temperature to selectively extract nickel and iron, and leaching the residue with an acidic aqueous ferric or cupric
Simplified process for leaching precious metals from fuel
The membrane electrode assemblies of fuel cells are recycled to recover the catalyst precious metals from the assemblies. The assemblies are cryogenically embrittled and pulverized to form a powder.
Method For Thiosulfate Leaching Of Precious Metal
The Lens serves almost all the patents and scholarly work in the world as a free, open and secure digital public good, with user privacy a paramount focus.
Analytics for US Patent No. 4510027, Simultaneous leaching
A method for the recovery of precious metals such as gold and silver from various ore types is described which involves subjecting a slurry
WO2013023297A1 Process of leaching precious metals
Google Patents The invention relates to modifications of a non ammoniacal thiosulfate process of leaching precious metals e.g. gold or silver from precious metal containing ores.
Aqueous solution for leaching precious metals options
In U.S. patent 4439235 Simpson describes the process of extracting precious metals from carbonaceous crushed ores, in accordance with which the crushed ore is in contact with an aqueous solution of hypochlorite ion VC is yaytsa etching solution iodotope potassium and iodine, and metal is extracted from the solution by adding anponent, mainly the pot to increase the pH to a level of at least
Heap leaching
Gold heap leaching Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, andpounds from ore using a series of chemical reactions that absorb specific minerals and re separate them after their division from other earth materials.
US Patent for Aqueous leaching process for recovery of
This invention relates to a process for the recovery of precious metal/s from a precious metal containing material in an aqueous leach slurry or solution. The process includes the step of contacting the precious metal/s in the leach slurry or solution with a ligand selected from dithiooxamide rubeanic acid, or a substituted dithiooxamide. The leaching of PGMs, gold
US 5104445 A Process For Recovering Metals From
The present invention is a process to recover metals from refractory ores. It involves the chlorination of an ore concentrate in the presence of solid salt at a temperature between 300 DEG and 650 DEG C. Thereafter, an oxidation step can be used to convert iron chloride to iron oxide. Subsequent separation steps remove the salt, gangue, and iron oxides. Separate pathways are described for
Process for leaching of precious metals Degussa
09/08/1994· The present invention relates to a process for leaching of precious metals e.g., gold and/or silver from particle shaped, solid materials, particularly ores and ore concentrates. The process includes the use of a cyanide containing alkaline leach solution in
US5250272A Process for leaching precious metals with
A process for leaching gold and silver from ores and ore concentrates is disclosed using a cyanide leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 Mg of O 2 /liter. In the invention, leaching takes place in the presence ofposition catalysts and preferably the formedplexes are separated during leaching from the leach
Extraction of precious metals from Free Patents Online
12/07/1994· United States Patent 5328669 . Abstract: Platinum group metals, gold and silver are extractedplex ores, automobile scrap, refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of ammonium ions and oxygen. The precious metal
US20140212346A1 Process of leaching precious metals
US20140212346A1 Process of leaching precious metals Google Patents The invention relates to modifications of a non ammoniacal thiosulfate process of
Method For Thiosulfate Leaching Of Precious Metal
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of
Method For Thiosulfate Leaching Of Precious Metal
The Lens serves almost all the patents and scholarly work in the world as a free, open and secure digital public good, with user privacy a paramount focus.
US Patent # 5,833,937.binations used as
United States Patent : 5,833,937: Kerr November 10, 1998binations used as copper and precious metal heap leaching agglomeration aids Abstract. An improved method for extracting a precious metal from mineral fines by heap leaching with dilute sulfuric acidprises agglomerating the mineral fines prior to formation into a heap with an agglomerating agent
Bacterio electric leaching of metalsPatent DOE Patents
Bacterio electric leaching of metals Patent Lazaroff, Norman Dugan, Patrick R. The separation of cationic materials from an ore body is assisted by the application of an electric potential, and resulting current, to the ore body, in association with iron or sulphur oxidizing bacteria.
PROCESS FOR ACIDIC LEACHING OF PRECIOUS AND CHALCOPHILE METALS
A process for recovery of one or more elements, selected from precious metals and chalcophile metals as herein defined, from materials containing precious and/or chalcophile metal/s, said process including: i a leachingprising contacting the material with an acidic solution containing aprising an aqueous amino acidpound formed from an amino acid as herein
Installation for leaching precious metals
New! US patents search. Search Patent registration. Installation for leaching precious metals . C22B11/12 Apparatus therefor 57 Abstract: Use: for leaching of precious metals. Entity: set includes body reactor nozzle input and output leach solution and leached material, the capacity of the leach solution, the dispenser flow of leach solution in the form of a ball valve installed in
Extraction of precious metals from Free Patents Online
12/07/1994· United States Patent 5328669 . Abstract: Platinum group metals, gold and silver are extractedplex ores, automobile scrap, refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of ammonium ions and oxygen. The precious metal
US Patent for Process of leaching precious metals Patent
US Patent for Process of leaching precious metals Patent Patent # 9,150,942 issued October 6, 2015 Justia Patents Search The invention relates to modifications of a non ammoniacal thiosulfate process of leaching precious metals e.g. gold or silver from precious metal containing ores.
Process for leaching of precious metals Degussa
09/08/1994· The present invention relates to a process for leaching of precious metals e.g., gold and/or silver from particle shaped, solid materials, particularly ores and ore concentrates. The process includes the use of a cyanide containing alkaline leach solution in the presence of apound releasing oxygen.
Method for leaching of precious metals from technogenic
New! US patents search. Search Patent registration . Method for leaching of precious metals from technogenic raw material. E21B43/28 Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent E21B0043241000 takes precedence FIELD: mining. SUBSTANCE: method for leaching of precious metals from technogenic raw material involves preparation of open working
Leaching Solution an overview ScienceDirect Topics
Themonly used leaching protocol is the US EPA Method 1311 for the Toxicity Characteristic Leaching Procedure TCLP US EPA, 1992, which is designed to simulate leaching conditions in municipal solid waste landfills using a laboratory setup.
EnviroLeach Announces Award of 2nd Patent on its
31/01/2020· Using its proprietary non cyanide, water based, neutral pH treatment process EnviroLeach extracts precious metals from ores, concentrates, and E
Hydrometallurgical process for the recovery of precious
New! US patents search. Search Patent registration. Hydrometallurgical process for the recovery of precious metals content of the ores of precious metals thiosulfate leaching . C22B3/06 inanic acid solutions. C22B11 Obtaining noble metals 57 Abstract: The invention relates to the recovery of precious metal leaching. Hydrometallurgical process for the extraction of precious
Method For Thiosulfate Leaching Of Precious Metal
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of
US Patent Application for PROCESS FOR ACIDIC LEACHING OF
A process for recovery of one or more elements, selected from precious metals and chalcophile metals as herein defined, from materials containing precious and/or chalcophile metal/s, said process including: i a leachingprising contacting the material with an acidic solution containing aprising an aqueous amino acidpound formed from an
Process for leaching precious metals Free Patents Online
05/10/1993· Process for leaching precious metals with hydrogen peroxide and a cyanide leaching solution US Patent References: 4971625: Method for leaching gold and/or silver out of ores or out of ore concentrates and also out of precious metal wastes or precious metal scrap by using cyanide containing leaching solutions: 1990 11 20 : Bahr: 423/31: 4816234: Utilization of oxygen in leaching
Chlorination process for removing precious metals from ore
27/03/1984· United States Patent 4439235 A process for removing precious metal valuesminuted carbonaceous ores, comprising the steps of a contactingminuted ore at an elevated temperature below 100° C. with an effective amount of an acidic aqueous solution of hypochlorite, iron ion and an acid to form an extraction mixture slurry including i an aqueous liquid
Method for extracting copper, silver and related metals
This patent describes a process for selectively extracting precious metal such as silver and gold concurrent with copper extraction from aqueous solutions containing the same.