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Patent Searching and Data


Matches 251 - 300 out of 1,908

Document Document Title
WO/2006/087412
The invention relates to a method for recovering gold from a sulphidic concentrate, particularly one containing arsenopyrite and/or pyrite, hydro- metallurgically. The concentrate is first subjected to leaching with a concentrated soluti...  
WO/2006/073807
A method and apparatus is provided for recovering platinum metal from a fuel cell stack without disassembly, burning or electrolysis by introducing an oxidizing acidic solution to at least one of the ports of the stack. The method may ad...  
WO/2006/073840
A method and apparatus is provided for recovering platinum metal from a catalyst-coated membrane comprising nanostructured elements by exposure to an oxidizing acidic solution. The method may additionally include the subsequent step of p...  
WO/2006/069738
The invention relates to a composition for cyanide lixiviation, comprising at least one non-ionic surfactant, and to a method for the production of metals using the above-mentioned composition.  
WO/2006/066391
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by a number of mechanisms, including control of the oxidation reaction conditions in the first autocla...  
WO/2006/064350
This invention relates to a process for obtaining metal values, typically base metals, platinum or gold from a feed material. In a first step of the process of the invention, feed material containing metal values is ground to a particle ...  
WO/2006/043065
A process for extracting a precious metal from a precious metal containing source is provided comprising the steps of :- (i) contacting the precious metal-containing source with a vapour phase chloride salt; (ii) condensing the precious ...  
WO/2006/039380
This invention relates to a composition of matter comprising predominantly silver metal microribbons, wherein the microribbons are at least 1 micron in length x 0.1 to 0.5 microns in width x 0.05 to 0.5 microns in height. It further rela...  
WO/2006/039453
This invention relates to a composition comprising associated predominantly silver nanoparticles, and a method of making said nanoparticles by mixing a polymer (e.g. Butvar), a reducing agent (e.g. an amine), which reduces silver solvent...  
WO/2006/037097
A process for the recovery of gold from a potassium iodide-iodine solution is provided. The gold is precipitated from the solution using a weak acid, (e.g. ascorbic acid), a buffer, (e.g. sodium bicarbonate), and a dye. The precipitate i...  
WO/2006/037097
A process for the recovery of gold from a potassium iodide-iodine solution is provided. The gold is precipitated from the solution using a weak acid, (e.g. ascorbic acid), a buffer, (e.g. sodium bicarbonate), and a dye. The precipitate i...  
WO/2006/033534
Disclosed are a single crystal wire and a manufacturing method thereof. The method comprises the steps of: placing into a growth crucible at least one metal selected from the group consisting of gold, copper, silver, aluminum and nickel;...  
WO/2006/024507
The invention relates to a process for recycling fuel cell components containing fluorine-containing and precious metal-containing constituents: in this process, the fluorine-containing constituents are separated off from the precious me...  
WO/2006/013568
The present invention deals with hydrometallurgical process for the extraction of non-ferrous precious metals originating from electronic waste, mineral earth, mineral materials. The process includes reacting the dust like fraction of cr...  
WO/2006/007484
In one aspect the present invention provides a method of recovering gold from each of at least two different refractory gold-bearing sulfidic mineral materials. A first mineral material is subjected to biooxidation pretreatment to releas...  
WO/2006/003246
The method and furnace according to the invention enable a continuous processing of anode slime and are particularly suited to be connected to a process where anode slime is treated by hydrometallurgic methods after roasting. In the meth...  
WO/2005/106051
The invention relates to a method for recovering gold from an intermediate product or residue containing sulphur and iron generated in the leaching of a copper raw material in connection with the hydrometallurgical production of copper. ...  
WO/2005/106052
The invention relates to a method for recovering gold from an intermediate product or residue containing sulphur and iron generated in the leaching of a sulphidic raw material. The recovery of gold and the other valuable metals in the ra...  
WO/2005/103308
A method for extraction with a solvent wherein copper is separated and recovered from an aqueous chloride solution containing copper and elements coexisting with copper, characterized in that it comprises a first step of adjusting the ch...  
WO/2005/098058
Process for recovering catalyst coating material from a supporting structure, such as, for example, a catalytic converter assembly having a metal mantle, including contacting the catalytic coating material with a sodium, potassium or amm...  
WO/2005/093107
A process for recovering a target metal from an oxidised metalliferous material comprises the steps of: - in a leaching stage, leaching the oxidised metalliferous material with an acidic aqueous halide solution to leach the target metal ...  
WO/2005/084836
The invention relates to the use of LCD's i.e. liquid crystal displays, and methods for the use thereof. The inventive methods are characterised in that the LCD's are used, at least partially, as a substitute for other raw materials. Gen...  
WO/2005/083131
The invention provides novel extractants for palladium which bring about enhancement in the extraction speed as compared with the extraction with DHS (which is one of the current extractants) and a process for the separation and recovery...  
WO/2005/080031
Apparatus (10) for producing silver nano-particle material (12) comprises a furnace (16) and a crucible (24) positioned within the furnace (16), the crucible (24) containing a quantity of precursor material (14), the furnace (16) heating...  
WO/2005/072863  
WO/2005/071121
Selective extraction of a metal anion complex, such as a platinum-group metal halide, from an aqueous solution containing other metal anions or anion complexes, by contacting the solution with a diquaternary ammonium salt having two quat...  
WO/2005/064023
This invention relates to a method of recovering metal values from refractory sulphide ores and concentrates. The method includes the steps of comminuting a refractory sulphide ore or concentrate, treating the ore or concentrate in an al...  
WO/2005/061113
The invention relates to processing the rock mass of placer accumulations, ore and technogenic fields for extracting heavy metals including fine and thin metals, for example gold and silver. The inventive method consists in removing dead...  
WO/2005/047856
Mineral processing system performs product movement and processing within a secured room 100 using robotics 170 and computerized automation 150. A heated chemical processing well 119 provides a hot bath wherein raw mineral is submersed i...  
WO/2005/040435
An electrochemical oxidative leach process extracts platinum group and incidental precious metals and/or recovers hydrocarbons from ore, such as rock, coal deposits and oil deposits. The process comprises immersing ore in a solution comp...  
WO/2005/035804
This invention is related to the recovery method of precious metals from waste catalysts. More particularly, this invention is related to the recovery s method of platinum series metals from automobile waste catalysts or alumina waste ca...  
WO/2005/031012
A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low ...  
WO/2005/031013
A process for extraction of platinum group metals (PGM) includes smelting PGM concentrate to provide PGM-containing matte, spinel-rich slag and oxide-rich slag. The matte is enriched with regard to PGM in a conversion step by selective o...  
WO/2005/028687
The invention relates to an improvement to the silver and gold leaching method with thiourea solutions, which is intended for use in the mining and mineral-processing industry. More specifically, the invention relates to a solution compo...  
WO/2005/019500
A method of etching and a method of regenerating a spent etching solution comprising adding metal particles to a spent etching solution to precipitate the residue metal or metals in the spent etching solution in the form of metal powders...  
WO/2005/017215
An improved thiosulphate leach process for the recovery of gold from ores and other gold-bearing materials, characterised in that the leach solution comprises thiosulphate, thiourea or a reagent chemically related thereto, and an oxidant...  
WO/2005/012581
Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution comprising a metal, a leaching agent and wat...  
WO/2005/012581
Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution comprising a metal, a leaching agent and wat...  
WO/2005/007903
A method for recovering at least one platinum group metal (PGM) species from a feed product selected from the group consisting of chromite ore, chromite ore concentrate and PGM concentrate comprising the steps of : mixing the feed with a...  
WO/2004/106562
The present invention is directed to a method for recovering a precious metal from a precious metal-containing material using a leaching agent and one or more oxidants. The leaching agent is preferably thiosulfate and the oxidants one or...  
WO/2004/104238
Copper is extracted from aqueous copper leach solutions wherein the leach solutions have a temperature of at least 30°C. The method comprises contacting the aqueous solution with an extraction reagent of the formula (I) : wherein R is a...  
WO/2004/101834
A bio-leach method of recovering at least one base metal from sulphidic or a concentrate wherein a residue of a primary bioleach of the concentrate, under mesophilic and moderate themophilic conditions, is processed to recover at least o...  
WO/2004/102711
The present invention relates to a process for the concentration of noble metals from fluorine-containing components of fuel cells, for example from PEM fuel cell stacks, DMFC fuel cells, catalyst-coated membranes (CCMs), membrane electr...  
WO/2004/092448
Precious metal-containing mineral material is subjected to an acidic thiocyanate leach to dissolve the precious metal as a precious metal-thiocyanate complex. A feed of the thiocyanate leach solution may include a large molar ratio of fe...  
WO/2004/090178
ABSTRACT A process of recovering platinum group metals (PGMs) from a pregnant solution or leachate containing PGM values and base metals, typically a cyanide solution or leachate. A non-selective precipitation of the PGM values and base ...  
WO/2004/087970
The method is referred to hydrometallurgy process and it serves for recovery of nonferrous, rare and precious metals from robust (hard to process) minerals, which may contain natural carbon or other robust compounds. This invention is ai...  
WO/2004/085687
The invention relates to a method for selectively extracting gold from gold-bearing materials. The gold-bearing material is subjected to the action of a caustic solution containing an oxidizing agent for gold that has a higher selectivit...  
WO/2004/083467
Cermet material obtained from unused inert anodes, used inert anodes and cermet used in the production of inert anodes is beneficiated into a nonferrous metal concentrate composition from which metal values contained in the composition m...  
WO/2004/081243
A method for recovering platinum group elements, wherein an oxide based raw material accompanying platinum group elements, a copper oxide, a solid carbonaceous reducing agent and a flux are charged into a gastight electric furnace equipp...  
WO/2004/081244
The invention relates to a method for refining gold containing metallic impurities. According to said method, the proportion of metal oxides is increased in a targeted manner by annealing the gold at preferably between 450 and 550 °C fo...  

Matches 251 - 300 out of 1,908