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WO/2009/091391A1 |
A pulse of over six kilovolts with a duration of 200 nanoseconds causes an explosion that fragments a mineral deposit with metals embedded therein. The fragmentation separates the metals from the mineral. A conditioning electromagnet tem...
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WO/2009/080522A1 |
The invention refers to a preparation method for nano- or microcrystals of Au, Pd, Pt or Ag comprising the steps of: a) preparing an ionic liquid mixture of cellulose and at least one metal salt selected form the group consisting of Au, ...
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WO/2009/076684A2 |
A method of recovering silver from a silver chloride mixture in which hydrogen gas is passed through the mixture to produce a metal chloride hydride which is then heated to dissociate the metal and to release hydrogen chloride gas.
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WO/2009/072908A2 |
A system of gold recovery whereby the bulk waste component of a gold ore is removed by froth flotation and the resultant concentrate is then treated by conventional cyanide leaching procedures, characterized in that 96 - 98 % of gold fro...
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WO/2009/068735A1 |
The invention relates to a method for processing pyritic copper sulphide concentrate, in which, in addition to copper, there is arsenic and gold bound to the sulphide minerals, or invisible gold. In the method concentrate is leached into...
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WO/2009/067039A1 |
The inventive method for extracting precious metals from refractory ores and concentrates can be used in the hydrometallurgical industry for processing sulphide mineral raw materials. The method for extracting precious metals from refrac...
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WO/2009/063438A2 |
This invention relates to a method of removing cyanide in the form of free cyanide (cyanide ions i.e. CN') and weak acid dissociable cyanide (WAD) from an aqueous stream. WAD is cyanide complexed with metals such as Cu. The method finds ...
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WO/2009/037596A2 |
The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.
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WO/2009/037594A2 |
The present invention is directed to flotation of refractory gold sulfide ores in which the ore is ground, floated, the tailings reground, and refloated to produce gold- bearing concentrates.
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WO/2009/034482A2 |
In the process of recovering platinum group metals from platinum group metal-and base metal-containing materials, the present invention uses reductants and a sulfur- deficient matte to aide the separation of the furnace matte from the fu...
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WO/2009/029463A1 |
The membrane electrode assemblies of fuel cells are recycled by pulverizing the membrane electrode assemblies into a powder by cryo-grinding and contacting with acid to leach precious metals. Surfactants can optionally be used to increas...
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WO/2009/023813A1 |
There rs provided a metals recover. s\ stem including at least one tank ha\ ing a top portion and a bottom portion, wherein the top portion has an inlet and sajd bottom portion has an outlet a process Quid cierh erv deuce in fluid commun...
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WO/2009/017136A1 |
A method of recovering catalyst metals from a catalyst containing a chalcogen element. The method includes: a chalcogen element ingredient removal step in which the electrode catalyst is heated in a hydrogen-containing inert gas to remov...
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WO/2009/018592A2 |
The invention provides an enrichment process for a PGM-group metals containing stream, said process including the steps of contacting activated carbon particles with a PGM-rich stream by contacting the stream with a batch of the particle...
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WO/2009/017434A1 |
The invention relates to methods for recovering non-ferrous, rare, radioactive and precious metals from refractory mineral raw materials and can be used in production. The inventive method for recovering non-ferrous, rare, radioactive an...
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WO/2009/007911A2 |
This invention relates to a separating apparatus and a separation method for quantitative separation of molten collector material and a molten slag during a process of assaying mineral ore samples to determine the concentration of select...
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WO/2009/001897A1 |
Disclosed is a novel separation reagent which has never exist before and can achieve a high extraction rate of rhodium in a chlorine-containing acid solution. Also disclosed is a method for the separation/collection of a platinum-group m...
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WO/2008/141443A1 |
A process for the extraction of a precious metal, such as gold or silver, from a sulphide ore or concentrate or other source material comprises subjecting the source material to pressure oxidation to produce a pressure oxidation slurry. ...
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WO2007108984B1 |
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...
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WO/2008/131856A2 |
The invention relates to a method for the recovery of ruthenium in the form of ruthenium halide, in particular ruthenium chloride from a supported catalyst material containing ruthenium, comprising at least the following steps: a) chemic...
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WO/2008/122251A1 |
The suspensions of micrometer crystals of silver are prepared according to this invention by mixing a silver salt, advantageously silver nitrate (AgNO3), a reduction agent from a group of species containing -OH or -CHO functional groups,...
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WO/2008/100163A1 |
The subjects of the invention are a method of manufacturing silver nanoparticles of 1 to 350 nm in size, a method of manufacturing cellulosic fibers and nanofibers containing silver nanoparticles, fibers and nanofibers containing silver ...
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WO/2008/099747A1 |
Disclosed is a method for recovering a platinum group metal from a waste containing a platinum group metal such as iridium. This method comprises a step wherein an easily water-soluble chloride of a platinum group metal is obtained by re...
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WO/2008/099681A1 |
Disclosed is a material which enables to efficiently recover metal ions such as silver ions. Also disclosed are a method for producing such a material, a method for adsorbing metal ions by using such a material, and a method for recoveri...
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WO/2008/081324A2 |
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by hot curing of the autoclave discharge slurry followed by decomposition of argentojarosite using str...
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WO/2008/075933A1 |
The present invention relates to a procedure for preparation by a wet reduction method of nanometric particles of metallic silver, with diameter ranging from 1 to 100 nm and an average diameter of 20 to 40 nm, with monodispersion charact...
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WO/2008/062785A1 |
Disclosed is a method for recovering ruthenium from a solid, wherein a ruthenium compound is supported by a carrier, with good recovery yield. Specifically disclosed is a method for recovering ruthenium, which is characterized by compris...
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WO/2008/059770A1 |
It is an object of the present invention to collect a scarce metal such as iridium from a light-emitting element which is no longer used. A method for collecting a metal is provided in which an organic metal compound which can emit visib...
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WO/2008/047010A2 |
The invention relates to a method for treating waste containing precious metals, said method comprising the following successive steps: the waste is brought into contact with a composition based on molten lead; the mixture obtained is sk...
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WO/2008/032288A2 |
The invention relates to a process for the pre-treatment of feed to a non-stirred surface heap leach bioreactor by applying in sequence first and second pre-treatment solutions to a feed to a non-stirred surface heap leach bioreactor, in...
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WO/2008/030106A1 |
This invention relates to a method and device for catchment of platinum group metals (PGM) in a gaseous stream, where the method comprises using a catalyst comprising a porous ceramic body in which at least a part of the surface area is ...
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WO/2008/022986A2 |
The invention relates to a process for the recovery of metals from electronic components which comprise at least one full-area or structured metallic coating on a substrate, with the at least one full-area or structured metallic coating ...
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WO/2008/013479A2 |
The invention relates to low-waste hydrometallurgy of precious metals, in particular to a method for refining precious metals and can be used for increasing the ratio of extraction of precious metals from alloys and to improve the purity...
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WO/2008/006901A1 |
The present patent describes a method for the recovery of noble metals from materials to recycle or intended for disposal and specifically from electric and electronic material discards. The method is mainly directed to the recovery of g...
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WO/2007/143807A1 |
The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more pas...
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WO/2007/137325A1 |
A process for recovering metals involving ion exchange comprising the step of recovering metal species from an ion exchange resin by elution of the resin with an eluent system containing (i) a first sulphite component comprising at least...
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WO/2007/138345A1 |
A process for making high metal content stabilised metal nanoparticles, comprises decomposing at least one metal acetylide in the presence of a first solvent under reducing conditions to yield a metal colloid solution and then recovering...
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WO/2007/115399A1 |
A method for recovering precious metals such as gold and silver from aqueous solution as solid is described The method includes mixing an aqueous solution (e.g, thiosulfate or thiocyanate lixiviant) containing precious metals with ferrou...
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WO/2007/118257A2 |
Small magnetic particles are introduced into a solution which is subjected to a bioleaching process. The suspended particles are coated with a substance which has a selective affinity for, and which interacts with, a metal in the solutio...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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