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Matches 351 - 400 out of 3,248

Document Document Title
WO/2004/081245A1
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/2004/080596A1
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 ...  
WO2004018717A3
A milling apparatus is modified by electrically insulating the milling chamber to enhance the efficiency of tribochemical reactions between reactive compositions during milling. The enhanced level of tribochemical reactivity is attribute...  
WO/2004/063404A1
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/2004/059018A1
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/2004/056471A1
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/2004/056468A1
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/2004/050660A1
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/2004/050927A1
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/2004/050926A1
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/2004/048623A1
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/2004/046036A2
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/2004/046036A3
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/2004/042094A1
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...  
WO2002018663A8
The invention provides a process for the selective recovery of aluminium, cobalt and platinum, and compounds thereof, from a catalyst composition including aluminium, cobalt and platinum, said process including the steps of treating the ...  
WO/2004/035844A1
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...  
WO/2004/033735A1
The invention relates to a method for removing silver from a chloride solution in a copper recovery process. According to this method, silver is removed using fine-grained copper powder and mercury. Silver removal occurs in at least two ...  
WO/2004/033734A1
A method of extracting amounts of precious metals from target materials. The target material in particulate form is mixed with particulate copper and coarse−ground wheat flour and roasted at least once in an induction furnace (220) . T...  
WO/2004/029308A1
The invention relates to rear-metal metallurgy and can be used for efficient osmium extraction from copper production waste material. The inventive method consists in pre-distilling organic components in a reducing medium from initial ra...  
WO2003100412A3
The invention provides a novel method of treating a mineral sample comprising the steps of: introducing a comminuted mineral sample together with a flux into a reaction vessel, the flux including a collector agent adapted during fusion t...  
WO/2004/022795A1
The process of the present invention recovers platinum group metal(s), such as platinum and palladium, from PGM-containing materials containing base metals, such as copper and nickel. The process controls sulfur levels by using solvent e...  
WO2004005557B1
The present invention relates to a process for separating at least one metal compound and/or a component thereof from a mixture, said process comprising contacting the said mixture with a heteropoly acid or heteropoly acid anion, thereby...  
WO/2004/022796A1
Disclosed is a process for recovering components from a liquor containing a complex or compound electrochemically dissociable to form a cation (C) and an oxidisable species for recovery including: (a) delivering the liquor containing sai...  
WO2003087416A9
PGMs can be extracted from a source material by heat-treating the source material to form a residue containing PGMs in a cyanide leachable condition and, thereafter, cyanide leaching the resudue using a solution containing cyanide to for...  
WO/2004/018717A2
A milling apparatus is modified by electrically insulating the milling chamber to enhance the efficiency of tribochemical reactions between reactive compositions during milling. The enhanced level of tribochemical reactivity is attribute...  
WO2002070756A3
A method of dissolve at least one metal from jarosite or other iron hydroxy sulfate containing-material which includes the steps of subjecting the material to alkaline treatment in a brine solution to facilitate jarosite decomposition, a...  
WO/2004/013361A1
A dry method of recovering a platinum group element, comprising charging a substance containing platinum group element to be treated and a copper source material containing copper oxide together with a flux component and a reducing agent...  
WO/2004/005556A1
A process for leaching precious metals such as gold from an ore such as a sulphide ore, the process including the steps of milling an ore containing a precious metal to produce a milled ore, contacting the milled ore with water, an alkal...  
WO/2004/005557A1
The present invention relates to a process for separating at least one metal compound and/or a component thereof from a mixture, said process comprising contacting the said mixture with a heteropoly acid or heteropoly acid anion, thereby...  
WO/2003/104503A1
Methods for inhibiting depletion of metal values from pregnant lixiviant solutions comprise contacting the requisite metal ore with a prep-robbing inhibition agent (PRIA) comprising one of: (I) alkyl polyglucoside surfactants; (II) imida...  
WO/2003/100412A2
The invention provides a novel method of treating a mineral sample comprising the steps of: introducing a comminuted mineral sample together with a flux into a reaction vessel, the flux including a collector agent adapted during fusion t...  
WO/2003/093515A1
A process for the chromatographic interseparation of rhodium in admixture with at least one base metal from a feed solution comprising complexes of these metals. The process comprises contacting the solution with at least one chromatogra...  
WO/2003/093516A1
The invention relates to a method for refining precious metal concentrate, and according to said method, at least the precious metal concentrate (9), reaction gas (10), flux (11) and flue dust (12) to be treated are fed together into the...  
WO/2003/091463A1
The invention relates to a method for the recovery of gold in connection with the hydrometallurgical production of copper from a residue or intermediate product containing sulphur and iron generated in the leaching of copper raw material...  
WO/2003/087416A1
PGMs can be extracted from a source material by heat-treating the source material to form a residue containing PGMs in a cyanide leachable condition and, thereafter, cyanide leaching the resudue using a solution containing cyanide to for...  
WO/2003/080879A1
The present invention relates to a process for the recovery of gold and silver from the used refractory bricks of Dore furnace. This invention particularly relates to a process for the recovery of gold and silver from the used refractory...  
WO/2003/078670A1
A method for separating a platinum group element, which comprises a step (A) subjecting a material containing a platinum group element and selenium and/or tellurium to a treatment with an alkali, a step (B) of leaching selenium and/or te...  
WO2003010346A3
A process is disclosed for recovering platinum group metals from a spent catalytic member, and in particular, from a catalytic converter from an automobile. The process comprises comprising introducing the catalytic member (10) into a re...  
WO2001088211A3
The invention relates to a method for the treatment of work pieces with a palladium colloid solution by bringing the work pieces into contact with the colloid solution, palladium being recovered after the use of the colloid solution. Thi...  
WO/2003/055598A1
This invention provides a method for recovering rhenium oxide from a material containing rhenium by itself or rhenium in combination with some other element, such as an element catalytically active for a catalytic process, such as hydrog...  
WO/2003/056043A1
The present invention was structured by the author to make feasible the industrial recovery of Platinum Group Metals-PGM and oth er noble metals through the processing of spinel minerals. The spinel minerals are rejected in phosphate, ti...  
WO2003025234A3
The invention relates to a method for obtaining metals from a cobalt and/or nickel arsenic sulfide ore or ore concentrate and/or a cobalt and/or nickel sulfide ore or ore concentrate, according to which the cobalt and/or nickel arsenic s...  
WO/2003/046231A1
A method to enhance the extraction of an element from an ore includes subjecting the ore, or element bearing material to electromagnetic radiation to induce pyrolysis of the material. The residue of the pyrolysis may then be processed in...  
WO/2003/045627A1
A system, workstation (100) and method for recovering noble metal from scrap generated during the manufacture of noble metal units. The method includes providing a cast metal unit such as a dental crown or a jewelry item. The unit is mad...  
WO2003010345B1
The present invention is directed to a process for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid...  
WO/2003/033747A1
A method of separation and/or recovery of a precious metal from a solution containing said precious metal in ionic form, optionally in the presence of impurities, including the step of contacting a solution containing said precious metal...  
WO/2003/029501A1
The present invention provides an additive alloy consisting essentially of (7) percent to (45) percent by weight copper, (40) percent to (84.50) percent by weight zinc, and 0.1 percent to (4) percent by weight silicon, the alloy being fr...  
WO/2003/027339A1
A process for the recovery or removal of metal species from a solution or slurry comprising the steps of: contacting the solution or slurry with a poly(alkyleneimine) polymeric material to load the poly(alkyleneimine) polymeric material ...  
WO/2003/025234A2
The invention relates to a method for obtaining metals from a cobalt and/or nickel arsenic sulfide ore or ore concentrate and/or a cobalt and/or nickel sulfide ore or ore concentrate, according to which the cobalt and/or nickel arsenic s...  
WO/2003/020990A1
The invention relates to a method of transforming colloidal silver into ionic silver consisting in subjecting a medium containing the colloidal silver to the action of ultrasound. The invention also relates to a method of purifying a dev...  

Matches 351 - 400 out of 3,248