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Matches 51 - 100 out of 3,997

Document Document Title
WO/2014/047728
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/2014/047759
Disclosed is a method for producing a high-purity nanometer zinc oxide from electrolytic zinc acid-leaching residues by an ammonia process. The method comprises: adding slaked lime being 1-5% of the mass of electrolytic zinc acid-leachin...  
WO/2014/047672
A two stage method (10) for the recovery of nickel and other metals from nickel bearing laterite ore, sulphide ore, oxide ore or concentrate (14), and nickel sulphide ore or tailings (24) is described. The method (10) in a first stage le...  
WO/2014/048385
Provided is a method for comprehensively recovering rare earth and fluorine in the bastnaesite treatment process, the method comprising: oxidizing and roasting the bastnaesite, using hydrochloric acid to leach the roasted mixture, adding...  
WO/2014/047762
Disclosed is a method for producing a nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization. The method comprises: taking ammonia water-ammonium bicarbonate solution as a leaching agent; adding 0.3-0.5 kg sodium f...  
WO/2014/047763
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/2014/047764
Disclosed is a method for producing a high-purity nanometer zinc oxide from steel plant smoke and dust by ammonia decarburization. The method comprises: leaching with an ammonia water-ammonium carbonate solution as a leaching agent, addi...  
WO/2014/043771
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/2014/043771
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/2014/042549
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/2014/042131
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/2014/042136
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/2014/041178
The present invention provides an enzymatic method for dissolving sulfide minerals in an aqueous composition.  
WO/2014/042948
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/2014/040138
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/2014/041178
The present invention provides an enzymatic method for dissolving sulfide minerals in an aqueous composition.  
WO/2014/040136
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/2014/037335
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/2014/037433
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/2014/038236
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/2014/038762
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/2014/037336
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/2014/032095
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/2014/034296
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/2014/036270
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/2014/030878
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/2014/030048
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/2014/031382
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/2014/030395
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/2014/029031
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/2014/030877
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/2014/030396
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/2014/030218
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/2014/029017
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/2014/030394
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/2014/026217
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/2014/022946
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/2014/023755
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/2014/022882
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/2014/025568
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/2014/023092
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/2014/023464
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/2014/021119
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/2014/021062
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/2014/021523
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/2014/013929
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/2014/014379
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/2014/014380
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/2014/013092
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/2014/008586
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...  

Matches 51 - 100 out of 3,997