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Matches 401 - 450 out of 8,157

Document Document Title
WO/2014/047763A1
Provided is a method for producing a high-purity nanometer zinc oxide from steel plant smoke and dust by an ammonia process. The method comprises the following steps of: leaching the steel plant smoke and dust, carrying out purification ...  
WO/2014/047728A1
A process for preparing alumina, said process comprising leaching an aluminum-containing material with HC1 so as to obtain a leachate comprising aluminum ions, magnesium ions and a solid, and separating said solid from said leachate; sub...  
WO/2014/043771A1
The present invention relates to a process, equipment and circuit for concentrating mineral ores, using a combination of different technologies, such as clarification and separation of fines and ultra-fines; replacing cyclones during pre...  
WO/2014/043771A8
The present invention relates to a process, equipment and circuit for concentrating mineral ores, using a combination of different technologies, such as clarification and separation of fines and ultra-fines; replacing cyclones during pre...  
WO/2014/042549A1
The invention relates to metallurgy, specifically to acidic methods for producing alumina, and can be used in the processing of low-quality aluminium-containing raw materials. The method for producing alumina comprises treating an alumin...  
WO/2014/040138A1
A method for the selective recovery of nickel and cobalt from an ore processing stream is provided which includes the steps of contacting the ore processing stream with a resin presenting tertiary amine groups, separating the loaded resi...  
WO/2014/041178A2
The present invention provides an enzymatic method for dissolving sulfide minerals in an aqueous composition.  
WO/2014/040136A1
A process for extracting uranium from an acidic uranium, chloride, iron and sulphate containing solution, including the steps: a. contacting the solution with an organic phase containing a trialkylphosphine oxide to form a uranium loaded...  
WO/2014/042136A1
Provided is a method that uses a minimal amount of acid or alkali, involves a simple process, is inexpensive to operate, and can separate out and recover lithium, cobalt, or the like with high yield. After vacuum-baking, pulverization, a...  
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...  
WO/2014/042948A1
A system and method for recovering a metal value from a metal-bearing ore material are provided. A metal-bearing ore can be mixed with certain substances and to form an agglomerated ore. In an intermediate state, between agglomeration an...  
WO/2014/041178A3
The present invention provides an enzymatic method for dissolving sulfide minerals in an aqueous composition.  
WO/2014/037336A1
We propose a method for leaching nickel, cobalt and iron from a nickel laterite ore, characterized in that the nickel laterite ore is brought into contact with a solution of sulphuric acid and urea mixture. In this way, there is provided...  
WO/2014/037433A1
A method of dissolution of minerals in acid is disclosed. The method comprises providing minerals to be leached in an aqueous solution, supplying acid or an acid precursor to the aqueous solution, thereby forming a reaction mixture compr...  
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...  
WO/2014/037335A1
A method for recovery of iron in the form of an iron oxide as useful product, such as hematite, from a leach solution obtained from leaching of a nickel laterite ore, is proposed which comprises an oxidation and a hydrolysis of a ferric ...  
WO/2014/038762A1
Disclosed is a method for effectively leaching valuable metals such as vanadium and tungsten contained in a waste denitrification catalyst by using roasting and water leaching. According to the present invention, the method for leaching ...  
WO/2014/036270A1
Described herein are methods of recovering silver from solution to produce metallic (i.e., elemental) silver. These methods generally include a step of providing a silver-containing aqueous solution that includes cationic silver species,...  
WO/2014/032095A1
A method for recovering scandium comprises the steps of providing an aqueous solution containing one or more dissolved EDTA salts, contacting the solution with a scandium-containing material so that scandium and at least one other impuri...  
WO/2014/034296A1
In the present invention, n iterations of a separation step (n≥2) are performed, the separation step including a step for forming an aggregate by adding an organic compound having an amino group and a polymer having a carboxyl group to...  
WO/2014/031382A1
A method of eluting metal ions from a bed of metal-loaded chelating resin wherein the resin includes a crosslinked styrene-divinylbenzene copolymer matrix with pendent methyleneaminopyridine or phosphonic acid groups and the method inclu...  
WO/2014/030396A1
Provided is a method that selectively extracts and, at a low cost, recovers indium from an acidic solution containing indium and gallium. The present invention is a method that is for isolating a valuable metal and that, by means of subj...  
WO/2014/030394A1
Provided are an extraction agent and extraction method that selectively extract and, at a low cost, recover indium from an acidic solution containing indium and zinc. The indium extraction agent comprises an amide derivative represented ...  
WO/2014/029017A1
Nanofiltration can be used to improve a hydrometallurgical process in which valuable metal is extracted from ore or tailings by leaching with a suitable lixiviant. The process requires at least two nanofiltration subsystems in which raff...  
WO/2014/029031A1
It is described a process for extracting magnesium from magnesium-bearing materials comprising the steps of leaching the magnesium-bearing material with HCl as to obtain a leachate comprising the magnesium in solution and a solid form; p...  
WO/2014/030048A1
A process of extracting copper from copper sulphide minerals which is enhanced at solution potentials exceeding 700 mV SHE, in the absence of any microorganism, by contacting the minerals in a pre-treatment phase using an acid solution a...  
WO/2014/030218A1
The purpose of the present invention is to improve the separation rate for specific transition metals. Provided is a flocculant that forms transition metal ions into aggregates by coordinate bonding, wherein the flocculant has a polymer ...  
WO/2014/030878A1
Disclosed is a method for separating and collecting useful metals from a waste lead-free solder. The method for separating and collecting useful metals in the waste lead-free solder according to the present invention, comprises: a leachi...  
WO/2014/030877A1
Disclosed is a method for separating tin from a variety of combined metals and collecting same. The method for separating and collecting tin from the variety of combined metals according to the present invention, comprises: a leaching st...  
WO/2014/030395A1
Provided are an extraction agent and extraction method that selectively extract and, at a low cost, recover gallium from an acidic solution containing gallium and zinc. The gallium extraction agent comprises an amide derivative represent...  
WO/2014/026217A1
A process (10) for the treatment of a lithium containing material, the process comprising the steps of: (i) Preparing a process solution from the lithium containing material (12); (ii) Passing the process solution from step (i) to a seri...  
WO/2014/023092A1
A process for decomposing waste rare earth luminescent materials by two times of acidolysis comprises the following steps: firstly, red powders (Y2O3:Eu) in the waste rare earth luminescent materials are dissolved by hydrochloric acid pr...  
WO/2014/025568A1
A system and method for recovering nickel from a mixed metal product liquor solution containing nickel and at least copper or iron including the steps of: (a) passing the product liquor solution through an ion exchange bed to load nickel...  
WO/2014/023464A1
Process and apparatus for winning at least one valuable metal oxide The invention relates to a process and an apparatus for winning at least one valuable metal oxide from a valuable ore mineral containing at least one insoluble valuable ...  
WO/2014/022946A1
The present invention relates to a hydrometallurgical method for leaching smelting dust with tricarboxylic acid solutions in four stages. The first stage includes leaching followed by a second stage of solid/liquid separation. The "liqui...  
WO/2014/022882A1
A method for recovering zinc from slag derived from lead smelting comprises subjecting the slag to a leaching step under conditions in which zinc is dissolved into solution and silica present in the slag dissolves and re-precipitates in ...  
WO/2014/023755A1
The present invention relates to a metal leach and recovery process. The process involves subjecting a metal bearing material to a reactive process by combining said metal bearing material with a leaching agent to liberate at least one m...  
WO/2014/021119A1
In the present invention, the following are included: a step for adding an inorganic salt to an aqueous solution that contains Dy and at least one of Nd and Pr, and then stirring the same (an inorganic salt addition step); a step for add...  
WO/2014/021523A1
The present invention relates to a method for extracting lithium from a solution containing lithium. The present invention provides a method for extracting lithium from a solution containing lithium, comprising the steps of: separating a...  
WO/2014/021062A1
The present invention enables low-concentration hydrogen sulfide gas generated at the time of the regular inspection and starting up of a production plant to be efficiently recovered and effectively supplied to a treatment plant in which...  
WO/2014/014379A1
The invention relates to metallurgy, in particular to acidic methods for producing alumina, and can be used in the processing of low-grade aluminium-containing stock. The method for producing alumina comprises burning the aluminium-co...  
WO/2014/014380A1
The invention relates to the metallurgical industry, specifically to the acid treatment of red mud obtained in the process of producing alumina, and can be used in technologies for recycling waste from alumina refinery holding ponds. The...  
WO/2014/013092A1
The invention is based on the recirculation of a solution containing no, or a low content of, iron, such that the final acidity conditions achieved are suitable for obtaining efficient precipitation of iron in the form of jarosite. In on...  
WO/2014/013929A1
A method for recovering a rare earth element from a rare earth element-containing alloy, the method being characterized by eluting a rare earth element by electrolysis of a metal powder of a rare earth element-containing alloy. The prese...  
WO/2014/009769A1
Method (1) of processing an iron ore (3) containing phosphorus, the iron ore having a gangue, the method comprising the steps consisting in: - mixing (A) the iron ore with at least one alkaline additive (7) able to react with the gangue ...  
WO/2014/008586A1
There are provided processes for preparing various products from various materials. For example, such processes are effective for extracting titanium and various other metals from various materials, thereby allowing for preparing product...  
WO/2014/008540A1
A method (10) for the recovery of nickel and other metals from nickel bearing sulphide ores, nickel bearing sulphide concentrates, and nickel sulphide metallurgical waste (12) is described. The method (10) comprises the steps of i) addin...  
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...  
WO/2014/005889A1
Method for centrifugal reprocessing of a solids-containing emulsion formed during the hydrometallurgical recovery of a metal, wherein the reprocessing takes place in at least one decanter (1) forming a first lighter liquid phase (5), a s...  
WO/2014/006196A1
A method for reducing hexavalent chromium in oxidic solids containing the steps: a) mixing the oxidic solid, containing Cr(VI), with a carbon-containing liquid compound in the range of 20 to 100°C; b) treating the mixture obtained accor...  

Matches 401 - 450 out of 8,157