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Matches 251 - 300 out of 1,882

Document Document Title
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/2005/100622
Process for recovering catalytic coating material from catalytic converters, catalytic material or catalytic assemblies where the catalytic coating material is bonded to a metal supporting structure, the process being carried out by cont...  
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/2005/007903
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/2004/106563
The present invention relates to an improved process for the recovery of palladium from spent catalyst. The present invention particularly relates to a suitable method of catalyst recovery of precious metals from spent catalysts or inorg...  
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...  
WO/2004/081245
The invention relates to a method for the fine refinement of gold containing metallic impurities, According to said method, the gold to be refined is first dissolved in hydrochloric acid and hydrogen peroxide. The dissolution of the gold...  
WO/2004/080596
A method for recovering a catalyst material from a catalyst structure having a substrate and, formed on at least a part of the surface thereof, a catalyst layer, characterized in that it comprises (a) a step of forming an overcoat layer ...  
WO/2004/063404
Disclosed is an apparatus for rapidly making a noble metal solution using plasma. This apparatus includes a power charging unit for charging electric energy so as to evaporate and ionize a noble metal into plasma, and a pulse energy appl...  
WO/2004/059018
A process for recovering a precious metal from a sulfidic material comprises the steps of preparing an acidic aqueous halide solution having an oxidation potential sufficient to oxidise the sulfidic material and render the precious metal...  
WO/2004/056471
This invention relates to a method for the thermal treatment of granular solids in a fluidized bed (3, 3a) which is located in a fluidized-bed reactor (1, 1a, 38), wherein microwave radiation is fed into the fluidized-bed reactor (1, 1a,...  
WO/2004/056468
This invention relates to a method for the thermal treatment of granular solids in a fluidized bed (3, 3a) which is located in a fluidized-bed reactor (1, 1a), wherein microwave radiation is fed into the fluidized-bed reactor (1, 1a) thr...  
WO/2004/050660
The present invention is directed to novel heteroatom containing tetracyclic derivatives, pharmaceuticalcompositions contianing them, their use in the treatment and/or prevention of disorders mediated by oneor more estrogen receptors and...  
WO/2004/050927
A method for separating a platinum group element which comprises a step (A) of treating a material containing a platinum group element and one or both of selenium and tellurium with an alkali, a step (B) of leaching selenium and/or tellu...  
WO/2004/050926
The present invention relates to a process for the recovery of precious metals from spent catalysts or adsorbent or inorganic waste. More specifically a process is provided for the recovery of palladium from silica, which is used as an a...  
WO/2004/048623
The present invention is directed to a method for the recovery of one or more trace elements including gold and one or more platinum group elements from coal (11). More particularly, the present invention may specify parameters for the s...  
WO/2004/046036
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding agents.  
WO/2004/046036
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding agents.  
WO/2004/042094
Precious metals such as gold can be extracted from a refractory ore using a conventional cyanide leaching step and with reduced cyanide consumption by pre-treating the ore prior to cyanide leaching. The refractory ore is pretreated by fi...  
WO/2004/035844
A process for extracting gold from arsenic-containing concentrate, including heat and keep the smelting chamber to a temperature of 100-300 °C under the reduced pressure lower than 50 Pa to remove the water vapor and some dust in the co...  

Matches 251 - 300 out of 1,882