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Matches 351 - 400 out of 1,919

Document Document Title
WO/2002/070756
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/2002/066691
A sieve tray column for stripping or recovering metal values from a metal value bearing material includes an elongate column body having an upper end and a lower end and a chamber defined therein. A plurality of spaced apart sieve trays ...  
WO/2002/061156
A method for recovering palladium by reducing and capturing a palladium ion present in water together with a divalent copper ion and the like, using a metal ion treating agent having a porous carrier and an anthrahydroquinone compound ca...  
WO/2002/059387
A method for selectively separating and recovering palladium from an aqueous palladium/tin catalyst solution. The method includes teh steps of adjusting the pH of the aqueous solution to a specified pH range therby precipitating the tin,...  
WO/2002/053788
A method for the recovery of base metals such as cobalt, nickel, copper, lead, zinc, mercury and cadmium, precious metals such as silver and gold, as well as the platinum group metals, comprising ruthenium, rhodium, palladium, osmium, ir...  
WO/2002/046483
This invention relates to methods for regenerating spent DNA detection chips for further use. Specifically, this invention relates to a method for removal of silver form used DNA detection chips that employ gold nanoparticle-oligonucleot...  
WO/2002/036837
A chromatographic separation method separates ruthenium from other platinum group metals in a feed solution, by converting the Ru to a nitrosyl complex, retaining the nitrosyl complex temporarily on the chromatography column and subseque...  
WO/2002/034399
The invention relates to a method for processing shredder residues of metal-containing refuse, especially bodies of motor vehicles, according to which the shredder residues are separated into a shredder light fraction (SLF) and a non-fer...  
WO/2002/033135
A method for the recovery of a metal from a liquid medium containing the metal I solution or in finely divided insoluble from comprises contacting the medium with a functionalised polymer fibre capable of binding the metal and recovering...  
WO/2002/028529
Ion exchange resins composed of a polymeric matrix functionalized with a piperazine group are suitable for separating gold cyanide from aqueous medium containing gold cyanide complex and other metal cyanide complexes in a process wherein...  
WO/2002/022899
Reducing the level of base metal species during the cyanide extraction of gold and silver from their ores by treating an aqueous slurry of the ores with a water-soluble sequestering agent for the base metal species for a time sufficient ...  
WO/2002/020857
A method for producing a silver having high purity from a raw material of low grade, characterized in that it comprises dissolving the raw material with a nitric acid solution, adding hydrochloric acid to the resulting mixture to give si...  
WO/2002/020451
A method of recovering metal values from an ion exchange resin to which a metal species is bound comprising contacting the reaction product stream with a basic ion exchange resin such that at least a part of the metal becomes bound to th...  
WO/2002/018663
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/2002/008474
The present invention relates generally to a process for the production of sulfuric acid and liberation of metal values such as copper and precious metals from materials containing sulfur through pressure leaching operations. In accordan...  
WO/2002/004919
The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a rea...  
WO/2002/000951
A method for producing a platinum material reinforced with dispersed oxide, which comprises adding powdered platinum into water to prepare a platinum suspension, admixing the platinum dispersion with a zirconium nitrate solution and a ur...  
WO/2001/098548
The invention relates to a chromatographic method for interseparating platinum group metals from a feed solution, wherein the feed solution is oxidated prior to the chromatographic separation to reach a redox-potential of at least 900 mV...  
WO/2001/088211
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/2001/088212
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relativel...  
WO/2001/083835
A process for recovering gold from a concentrate such as electrolytic sludge, a zinc-gold precipitate, general gold scrap or a gravity concentrate. The concentrate is leached in HCl solution with gaseous chlorine to dissolve the gold and...  
WO/2001/083834
A supercritical oxidation process carried out in water is capable of oxidising "organics" in precious metal organic compositions such as heterogeneous (Pt/C) or homogeneous precious metal catalysts and producing a precious metal oxide wi...  
WO/2001/077011
A new method of creating thin free-standing pin hole-free hydrogen-selective palladium-bearing membranes that comprises thinning cold-rolled membranes by chemical etching or electrochemically electrolyzing of at least one membrane surfac...  
WO/2001/066811
Briefly stated, there is provided a method for reducing cyanide consumption in precious metals mining extraction processes involving a sulfur bearing ore body, comprising the steps of providing a precious metal bearing material having in...  
WO/2001/062993
Disclosed is a process for recovery of cyanide and metals from a liquor containing complexes of cyanide and metal typically generated by a metallurgical or industrial process. The process involves electrochemical dissociation of the meta...  
WO/2001/056932
The invention relates to a method for separating and recovering rhodium from reaction products of oxosynthesis, especially reaction products containing cobalt. The invention also relates to the reuse of rhodium as a catalyst for hydrofor...  
WO/2001/055462
The present invention concerns a process for refining silver bullion, i.e. raw silver containing generally more than 90 % silver besides Se, Pb, Au, Cu and platinum group metals (PGM) as main impurities. The process comprises the steps o...  
WO/2001/049889
This invention provides a method to control the off gas emission of sulfur dioxide from a mineral ore roaster by grinding a sulfur-containing mineral ore, adding sodium sesquicarbonate to the mineral ore, and roasting the ore and sodium ...  
WO/2001/042531
A component is made of or coated with a refractory material for use at high temperature, e.g. in an aluminium production cell, an arc furnace or an apparatus for treating molten metal. The refractory material comprises particles of a ref...  
WO/2001/042519
A process for leaching precious metals from material containing precious metals, such as oxidic and sulfidic gold-bearing ores, is disclosed. The process includes the steps of: (i) leaching the precious metal with a leach solution contai...  
WO/2001/042168
An aluminium-wettable protective coating on a substrate, for use at elevated temperature in an oxidising and/or corrosive gaseous and/or molten environment is disclosed. The coating (20A, 20B, 20C, 20D) is applied to protect the substrat...  
WO/2001/029275
The present invention, therefore, provides stage crushing method for recovering precious metals from slag produced by a coal burning furnace or boiler comprising: a plurality of crushing steps, wherein each crushing step produces slag pa...  
WO/2001/023067
Compositions and methods for selectively binding metal ions from source solutions are disclosed. The compositions include 1) polyamide-containing ligands covalently bonded to a particulate solid support, and 2) polyamide-containing polym...  
WO/2001/018266
A method of recovering zinc from a zinc bearing sulphide mineral slurry which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21% oxygen by volume, to the slurry, and...  
WO/2001/018263
A method of oxidising a slurry containing solid reactants which includes the step of supplying a feed gas containing in excess of 21 % oxygen by volume, to the slurry. Preferably the feed gas contains more than 85 % oxygen by volume. The...  
WO/2001/018602
This invention concerns the developing of silver halide photographic products. Silver-laden slurries accumulate in developing baths. Its is possible eliminate these silver-laden slurries by placing the developing baths in contact with al...  
WO/2001/018267
A method of recovering a precious metal from a sulphide mineral slurry which contains the precious metal which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21% oxy...  
WO/2001/018269
A method of recovering copper from a copper bearing sulphide mineral which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21 % oxygen by volume, to the slurry, and r...  
WO/2001/018262
A method of bioleaching a slurry containing sulphide minerals which includes the step of supplying a feed gas containing in excess of 21% oxygen by volume, to the slurry, increases the rate of oxygen transfer from the gas to the liquid p...  
WO/2001/018268
A method of recovering nickel from a nickel bearing sulphide mineral slurry which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21 % oxygen by volume, to the slurry...  
WO/2001/016383
A process is disclosed for extracting a first metal from a material containing said first metal, including the step of treating said material with an aqueous alkaline solution containing an oxidising agent and complexes of ions of one or...  
WO/2001/016383
A process is disclosed for extracting a first metal from a material containing said first metal, including the step of treating said material with an aqueous alkaline solution containing an oxidising agent and complexes of ions of one or...  
WO/2001/011094
A foraminate element for recovery of platinum and/or palladium and/or rhodium lost from a platinum and/or palladium and/or rhodium-containing catalyst comprising a substrate containing palladium or a palladium alloy thereon in a thicknes...  
WO/2001/009398
The invention relates to an apparatus for the heating of flowing material containing finely divided solids, such as concentrate slurry containing precious metals and/or precious minerals, up to a desired temperature range, for instance t...  
WO/2000/075383
Apparatus suitable for use in the recovery of gold from a source material containing gold sulphides, the apparatus including a heated retort for receiving the source material so as to separate it into a solids component and a volatiles c...  
WO/2000/068446
A leaching process for the recovery of gold from a gold containing ore is described in which a gold ore is lixiviated with an acid (pH 0.5-2.0) solution containing 1-15 g/l thiourea in the presence of an oxidising agent and a reducing ag...  
WO/2000/065112
The process of recovering precious metals from ores containing precious metals, such as gold and silver, from an aqueous ammoniacal thiosulfate leach solution to provide a significant practical and economical process for the recovery of ...  
WO/2000/065111
A method for recovering a precious metal from a host material, comprises the steps of subjecting the host material to an oxidative pressure leach process, in the presence of a halide ion constituent, preferably a chloride ion, which is r...  
WO/2000/063630
An apparatus for treating, in particular purifying or degassing, molten metal (40), comprising a component (10) exposable to molten metal to be treated and means (13) for imparting a rotary motion to the molten metal (40) about a substan...  
WO/2000/061494
A sodium cyanide composition having a paste-like consistency is provided which comprises sodium cyanide, a base, water, and a rheology modifier. Also provided are processes for producing and using the composition. The composition can be ...  

Matches 351 - 400 out of 1,919