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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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.
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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.
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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...
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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...
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WO/2004/033735 |
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 ...
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WO/2004/033734 |
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...
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WO/2004/029308 |
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...
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WO/2004/022795 |
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...
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WO/2004/022796 |
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...
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WO/2004/018717 |
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...
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WO/2004/013361 |
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...
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WO/2004/005556 |
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...
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WO/2004/005557 |
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...
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WO/2003/104503 |
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...
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WO/2003/100412 |
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...
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WO/2003/093515 |
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...
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WO/2003/093516 |
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...
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WO/2003/091463 |
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...
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WO/2003/087416 |
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...
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WO/2003/080879 |
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...
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WO/2003/078670 |
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...
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WO/2003/055598 |
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...
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WO/2003/056043 |
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...
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WO/2003/046231 |
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...
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WO/2003/045627 |
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...
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WO/2003/033747 |
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...
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