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Matches 251 - 300 out of 3,250

Document Document Title
WO/2007/109841A1
The present invention relates to an improved method for the recovery of metal values, in particular copper and gold, from a metal value-bearing material containing arsenic and/or antimony and a source of sulphate ions, by means of a high...  
WO/2007/107792A1
A method is described for producing highly stable silver colloidal solu- tions by reducing silver nitrate with lithium citrate. In the method, the main steps consist of: (a) heating a first quantity of water to a first predetermined temp...  
WO/2007/108984A3
To produce metallic iron from iron ore, a composition comprising a mass of material formed from a mixture of iron ore particles and particles of a reductant that is either a biomass material in particulate form or a plastic resinous mate...  
WO/2007/104106A1
A trench leaching system (10, 10') including a tank (14) containing a charge of ore (50) flooded with a liquid solvent (94) up to the level of a gutter (90). A pump (42) recirculates the liquid solvent (94) upwardly through the charge of...  
WO/2007/099536A3
An efficient process for purification of palladium from a palladium and rhodium mixture is described, which is based on the difference in uptake of the two metals into a strong anion exchanger polymer, e.g., a copolymer of polystyrene an...  
WO/2007/099365A1
A process for re-processing of a Fischer-Tropsch catalyst is described comprising the steps of; (i) de-waxing the Fischer-Tropsch catalyst, (ii) subjecting the de-waxed catalyst to hydrometallurgical leaching or extraction to separate ca...  
WO/2007/099536A2
An efficient process for purification of palladium from a palladium and rhodium mixture is described, which is based on the difference in uptake of the two metals into a strong anion exchanger polymer, e.g., a copolymer of polystyrene an...  
WO/2007/098603A1
A process for extracting gold from a gold-bearing ore. The process includes, first, providing a leaching liquor with thiosulfate anion and ethylenediamine. Next, the leaching liquor is contacted with the gold-bearing ore to form a pregna...  
WO/2007/098613A1
A recovery process for at least one precious metal contained in an ore, includes: comminuting the ore to obtain particles smaller than a predetermined particle size; separating the particles into at least two groups, each group being cha...  
WO/2007/093666A1
The invention relates to a method for recovering gold in connection with the hydrometallurgical production of copper from a waste or intermediate product containing sulphur and iron that is generated in the leaching of the copper raw mat...  
WO/2007/090725A1
The present invention relates to solutions comprising water and at least one metal cyanide, with at least part of the water being obtained from wastewater which arises as depleted wastewater in a process for the winning of noble metals f...  
WO2006069738A8
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/2007/080648A1
A method of noble-metal separation/recovery by which noble metal ingredients can be efficiently isolated by a simple procedure using an easily available adsorbent and eluent. The method comprises passing through a cellulose column a meta...  
WO/2007/081243A2
The invention can be used for extracting precious metals (platinum, palladium, gold, etc) from different mineral raw materials containing chlorides of alkali and alkali-earth metals, for example a bulk concentrate obtainable from clay-sa...  
WO/2007/081243A3
The invention can be used for extracting precious metals (platinum, palladium, gold, etc) from different mineral raw materials containing chlorides of alkali and alkali-earth metals, for example a bulk concentrate obtainable from clay-sa...  
WO/2007/080963A1
A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by...  
WO/2007/074129A1
The invention relates to a method for recovering ruthenium from a used ruthenium-containing catalyst which contains ruthenium as ruthenium oxide on a carrier material that is difficult to dissolve in mineral acid. Said method comprises t...  
WO/2007/065154A3
The invention provides an aqueous solution-based method for producing nanosized silver platelets, which employs the controlled mixing of a silver ion solution, a reducing solution, and an acidic solution in the presence of palladium ions.  
WO/2007/053947A1
Precious metal recovery by thiosulfate leaching where thiosulfate lixiviant is generated in situ employing elemental sulfur generated from partial oxidation of sulfidic precious metal-bearing feed and/or employing reactants from processi...  
WO/2007/045034A1
A method for the recovery of metal values from a metal value-bearing material containing arsenic and/or antimony and a source of sulphate ions such as sulphide ore or concentrate is disclosed. In one form the method comprises the steps o...  
WO/2007/039665A1
The invention relates to a method for processing a nickel product from nickel- bearing sulphidic raw materials, such as nickel sulphide concentrate or ore. According to the invention, the raw material is leached in atmospheric conditions...  
WO/2007/036334A3
The inventive recycling oven for treating explosive materials containing precious metals with organic portions, the combustion of which is associated with important energy release, comprises a switching device for alternating the a combu...  
WO/2007/036334A2
The inventive recycling oven for treating explosive materials containing precious metals with organic portions, the combustion of which is associated with important energy release, comprises a switching device for alternating the a combu...  
WO/2007/029128A1
This invention relates to a novel fire assay flux composition including, inter alia, a dispersant in the form of a source of phosphate; a primary reductant in the form of iron powder comprising particles having a particle size of 60 mesh...  
WO/2007/024211A1
A process for improving the recovery of gold from gold-bearing solutions formed from carbonaceous ore using a cyanide lixiviant, the process comprising treatment of tailings pond water with H2SO5 before introduction into a gold-recovery ...  
WO/2007/023002A1
The invention relates to a method for producing pure metal, metal mixtures and/or metal alloys, in particular for producing nanoparticles of pure metal, from a medium containing metal. Metal is produced and nanoparticles of said metal ar...  
WO/2007/019707A1
A method for extraction a metal from a mineral ore including a refractory ore contained in a metal. The method includes concentration of refractory ore followed by micronization of the concentrate until gold is liberated by the extractio...  
WO/2007/019707A8
A method for extraction a metal from a mineral ore including a refractory ore contained in a metal. The method includes concentration of refractory ore followed by micronization of the concentrate until gold is liberated by the extractio...  
WO/2006/137914A3
Process for extracting and recovering metals, including precious metals, such as platinum group metals and gold, from natural ores, ore concentrates or industrial materials, including contacting the natural ores, ore concentrates or indu...  
WO2005035804A9
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/2006/117101A1
The invention relates to a method for treating of oil contaminated, metal-containing solids, in particulat spent catalysts. Said solids are cleaned with a dense phase gas and then metal is recovered from said cleaned solids.  
WO2005083131A8
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/2006/087413A1
The invention relates to a method for the recovery of gold from a gold-containing chloride solution using activated carbon. The gold-containing solution and the carbon are contacted with each other, after which the gold that has formed a...  
WO/2006/087412A1
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/2006/073807A1
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/2006/073840A1
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/2006/069738A1
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/2006/066391A1
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/2006/064350A1
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 ...  
WO2005047856A3
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...  
WO2006013568A3
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/2006/043065A1
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/2006/039380A3
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/2006/039453A3
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/2006/037097A1
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/2006/033534A1
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/2006/024507A1
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/2006/013568A2
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...  
WO2005103308A8
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/2006/007484A1
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...  

Matches 251 - 300 out of 3,250