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WO/2014/124422A1 |
Methods described herein generally relate to the treatment of carbonaceous materials with ozone to facilitate the subsequent recovery of metal species (e.g., precious metals) from the carbonaceous material. In some cases, the method may ...
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WO/2014/122803A1 |
A method for leaching gold from a gold ore containing pyrite, in which the gold leaching rate is improved without requiring the use of a highly toxic chemical substance such as cyan, thiourea, thiosulfuric acid and a halogen gas. A metho...
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WO/2014/122363A1 |
The present invention relates to a method and an arrangement for pressure and temperature let down of autoclave discharge slurry, in particular in pressure oxidation or high pressure acid leach of metal containing ore. The method of the ...
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WO/2014/121150A1 |
A process for bio-oxidation of sulfides in mineral ore having a metal such as gold occluded or dispersed within the ore as a sulfide is disclosed. The first step comminutes the ore into particles with a size distribution having a P80 of ...
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WO/2014/119793A1 |
The present invention addresses the issues of providing: a novel separation method whereby metallic silver is separated from an aqueous phase, etc.; and a method whereby the form of the metallic silver to be extracted is controllable, wh...
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WO/2014/112637A1 |
The purpose of the present invention is to make it possible to easily concentrate a metal of a metal-ion-containing solution at a high efficiency and recover the metal from the metal-ion-containing solution at a high recovery efficiency....
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WO/2014/105944A1 |
Enzyme-based leaching agents for leaching metals from metal-containing ores. Methods for recovering metals from a metal-containing ores using such enzyme-based leaching agents are also described. Enzymes that are active under leaching co...
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WO/2014/092220A1 |
The present invention relates to manufacturing silver nanowires having a diameter less than 100 nanometers and a length of 10 microns or more, and more particularly, to a method for uniformly manufacturing silver nanowires having a high ...
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WO/2014/092133A1 |
Provided are: a separating agent and a platinum ion separation method that enable platinum ions to be separated from a solution containing low to high concentrations of platinum ions in a short time and with high selectivity; and a separ...
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WO/2014/090260A1 |
A zinc precipitation circuit is disclosed. The circuit comprises a vessel configured to carry clarified pregnant solution comprising a dissolved precious metal, the vessel further comprising means for delivering zinc particles; a precipi...
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WO/2014/091456A1 |
This invention relates to a method of recovering platinum group metals (PGMs - ruthenium, rhodium, palladium, osmium, iridium, platinum and gold) and (if present) base metals (especially copper, nickel and cobalt) from PGM-containing mat...
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WO/2014/069463A1 |
Provided is a method for collecting silver having high purity from an acidic aqueous solution containing iron and/or zinc and silver using a simple apparatus and with high efficiency. A method for collecting silver, comprising separating...
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WO/2014/068642A1 |
The purpose of the present invention is to provide a metal refining device that can improve the recovery efficiency in metal refining. The metal refining device is a metal refining device that recovers metal material constituting an elec...
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WO/2014/069474A1 |
Provided are: a graft copolymer which enables a large amount of introduction of an adsorptive functional group that adsorbs a metal and the like; a method for producing this graft copolymer; and an adsorbent material which uses this graf...
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WO/2014/064530A1 |
A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster...
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WO/2014/062289A1 |
A process for the recovery of gold from a gold-bearing aqueous filtrate, the process comprising the steps of: (A) Contacting the aqueous filtrate with dibutyl carbitol (DBC) in a two-stage solvent extraction process to remove the gold fr...
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WO/2014/056034A1 |
A method for recovery of gold from a gold-containing, refractory pyrite-rich ore or concentrate is disclosed. The method results in the production of a high grade, gold-containing solid intermediate concentrate. One embodiment comprises ...
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WO/2014/053705A1 |
The invention relates to a method of recovering silver and a method of controlling a leaching process for recovering silver from a direct zinc leach residue, an apparatus for recovering silver from a direct zinc leach residue, a control ...
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WO/2014/042131A1 |
Provided is a method for recovering gold with which it is possible to increase the amount of gold adsorbed by activated carbon. This method for recovering gold comprises: a step for obtaining a gold leachate by using an acidic leaching s...
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WO/2014/038236A1 |
The present invention improves the leaching speed of gold while also inhibiting the generation of sulfur dioxide in a method for leaching gold from gold ore containing pyrite without using highly poisonous chemicals such as cyanogen, thi...
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WO/2014/038048A1 |
A method for recovering precious metal held in a metal carrier catalyst from said catalyst, that includes a step (1) in which the catalyst is heated in a nitric acid solution, and a step (2) in which the post-step (1) catalyst is heat tr...
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WO/2014/036261A1 |
Described herein are methods of making metallic or elemental silver. These methods generally include a step of forming a reaction dispersion that includes a silver-containing compound, an organic acid, and a solvent that includes an alco...
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WO/2014/036228A1 |
Described herein are methods of making metallic or elemental silver in the solid state. These methods generally include a step of forming an at least substantially solvent-free solid state reaction mixture that includes a silver-containi...
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WO/2014/009928A1 |
This invention relates to a hydrometallurgical process for extracting platinum group metals (PGMs), gold, silver and base metals from a flotation concentrate (10) containing sulphide minerals such as pentlandite and chalcopyrite, along w...
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WO/2013/191269A1 |
An activated carbon for adsorbing a noble metal from an aqueous solution containing a noble metal, wherein the difference (absolute value) between the zeta-potential in a 10-mmol/L aqueous solution of sodium tetraborate, and the zeta-pot...
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WO/2013/180785A2 |
A method for recycling AglnCd control rod absorber bar material from a used control rod from a nuclear power plant includes sectioning AglnCd absorber bar from a used control rod into a first section and a second section, the first secti...
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WO/2013/171861A1 |
The present invention provides an extraction solvent for extracting metallic elements that is characterized in that: the total concentration of chlorine (Cl2) and hypochlorous acid (HOCl) is from 20 to 1000 ppm; chlorine (Cl2) and hypoch...
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WO/2013/167714A1 |
The cost of precious metals, such as gold, makes recovery or recycling of these materials economically viable and desirable. Disclosed herein is a method of recovering gold from waste sources thereof, in particular waste electrical goods...
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WO/2013/162118A1 |
The present invention relates to a method for concentrating and recovering noble metals from printed circuit boards of discarded mobile phones and catalysts of discarded cars using discarded nonferrous slag, which is industrial waste dis...
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WO/2013/152424A1 |
A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a t...
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WO/2013/145849A1 |
Silver and metal adsorbed by activated carbon are effectively eluted. A method for eluting silver and metal adsorbed by activated carbon, in which metal and silver are eluted from activated carbon that has adsorbed at least metal and sil...
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WO/2013/131453A1 |
A method for recovering ruthenium from waste catalyst of aluminum oxide loaded with ruthenium comprises the following steps: drying, roasting and cooling the waste catalyst of aluminum oxide loaded with ruthenium; grinding into black pow...
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WO/2013/129017A1 |
The purpose of the present invention is to recover, at a low cost and efficiently, gold adsorbed on activated carbon. A gold recovery method which includes a step of subjecting gold adsorbed on activated carbon to elution to obtain a con...
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WO/2013/108478A1 |
The purpose of the present invention is to efficiently recover gold in metal sulfide ores at low cost. This gold recovery method uses an acidic leaching solution including a chloride ion and/or a bromide ion as an anion and copper and ir...
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WO/2013/090981A1 |
A process for smelting a silver-rich ore or concentrate that comprises an ore or concentrate that contains at least 1% silver by weight, more preferably form 2% to 8% silver by weight. The process comprises feeding the silver-rich ore or...
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WO/2013/079804A1 |
Method for processing ash, particularly fly ash, in which method several elements are separated from the ash. In the method both noble metals and rare earth elements are separated.
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WO/2013/082614A1 |
Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.
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WO/2013/051965A1 |
The invention relates to a method for separating hydrogen-absorbing metals from solutions, and also to an apparatus for carrying out said method. A reduction is undertaken using hydrogen generated in a solution, wherein the reduction ...
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WO/2013/051715A1 |
Provided are: a palladium separating agent which is capable of separating palladium ions in a short time with high selectivity from solutions that contain palladium ions at low to high concentrations; and a method for separating palladiu...
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WO/2013/049886A1 |
A process for oxidising milled ore for recovery of noble metals including gold, silver and the platinum family, and other metals including copper. An acidic (pH under 0.7) aqueous oxidising solution includes chloride and bromide ions and...
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WO/2013/044380A1 |
The invention relates to a method for the extraction of precious metals, using halogens. It has been found that introducing halogens in the reactor in the form of hypohalites rather than free halogens simplified greatly the recycling of ...
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WO/2013/042340A1 |
According to a metal recovery method, it is possible to recover with high efficiency metals (metal ions) contained in a solution by culturing red algae belonging to the order Cyanidiales in a solution wherein the cell concentration there...
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WO/2013/035301A1 |
A precious-metal adsorbent is chemically modified by a functional group including an N atom and/or an S atom, and is formed from one of an alga, a residue of the alga, a substance obtained by treating the alga with a strong acid, and a s...
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WO/2013/029785A1 |
A method for removing metal and/or precious metal-containing depositions from substrates, wherein said substrate is subjected to treatment with an organo amine protectant component P and an inorganic active component A. Component P may b...
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WO/2013/023297A1 |
The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold or silver) from precious metal-containing ores. The process involves leaching the ore with an aqueous lixiviant contain...
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WO/2013/016813A1 |
There is provided a process for treating a feed material composition including a solid particulate precious metal material-rich feed material composition fraction and a solid particulate rare earth metal material-rich feed material compo...
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WO/2012/171486A1 |
Disclosed is a method suitable for efficiently producing silver nanowires with high aspect ratio. In this method, silver nanowires with aspect ratio of more than 300 and purity of more than 80% are produced through an acid compound media...
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WO/2012/170291A2 |
Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies relative to previous methods. Such materials are useful in electronic applications.
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WO/2012/161216A1 |
The present invention provides a complex which is produced by reductive bacteria during the culturing process and consists of a culture medium component and a metal-reduction product, and also provides uses thereof. The complex according...
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WO/2012/152408A1 |
The method is used to obtain metals, noble metals, and rare earth metals from scrap. The aim of the invention is to provide a method that allows an efficient recovery even from electronic scrap. This is achieved in that the scrap and car...
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