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Matches 401 - 450 out of 4,041

Document Document Title
WO/2012/005545
The present invention relates to a method of extracting lithium from a lithium bearing solution. More specifically, the present invention provides a method of economical extraction of lithium from a lithium bearing solution by adding a p...  
WO/2012/005548
The present invention relates to a method of economical extraction of magnesium, boron and calcium, while minimizing the loss of lithium, from a lithium bearing solution. More specifically, the present invention provides a method for eco...  
WO/2012/005182
A rare earth metal extractant containing, as the extractant component, dialkyldiglycol amide acid which is excellent in breaking down light rare earth elements is reacted in diglycolic acid (Xmol) and an esterification agent (Ymol) at a ...  
WO/2012/005183
A rare earth metal extractant containing, as the extractant component, dialkyldiglycol amide acid which is excellent in breaking down light rare earth elements is reacted in diglycolic acid (Xmol) and an esterification agent (Ymol) at a ...  
WO/2012/000090
A method of recovering copper from chalcopyrite concentrate by chemical leaching, using pyrite and silver. The catalytic properties of pyrite in the chalcopyrite leaching process are significantly enhanced by pretreating the pyrite with ...  
WO/2012/001501
A method of recovering copper wherein a copper sulphide mineral is subjected to a chloride leach cycle, and then to a bioleach cycle in which the mineral is heated with a chloride-containing solution from the chloride leach.  
WO/2011/162254
Disclosed are: a method for removing copper ions from a copper-containing nickel chloride solution, which can remove copper contained in the copper-containing nickel chloride solution with high efficiency; and a process for producing an ...  
WO/2011/160578
A method for producing electrolytic manganese metal by using two ores and apparatus thereof are disclosed. The method comprises the following steps: leaching in sulfuric acid (5), purifying to remove iron (7), deeply purifying (18) and e...  
WO/2011/160575
A manufacturing system for producing electrolytic manganese metal by two-mining method is disclosed. The system is designed to solve the problems of the conventional reduction roasting process in producing electrolytic manganese using ma...  
WO/2011/161671
An aeration system for a bed of ore that is laid upon a basal layer has a gas source located upstream for supplying gas and aeration pipes that distribute the gas downstream to the bed. Each aeration pipe has spaced-apart gas emitters th...  
WO/2011/160179
A method (10) for the pretreatment and separation of metals from cyanide containing solutions, the method characterised by the step of: directing a feed stream (12) containing cyanide, particulate matter and metal values to a pre-treatme...  
WO/2011/156861
A method of recovering a metal, such as a noble metal, from an impure source material by contacting the source material with a leach solution comprising a metal halide, an oxidant and an acid. The leach solution containing the target met...  
WO/2011/154603
The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water a...  
WO/2011/150584
A method for producing alumina from metallurgical materials containing aluminium, comprises the following steps: decomposing the metallurgical materials containing aluminium with sulphuric acid to obtain aluminum sulfate solution, purify...  
WO/2011/151521
A method and apparatus for converting an iron-bearing residue generated in the hydrometallurgical process that contains small amounts of soluble heavy metals into stable form be means of a neutralising agent. The residue is elutriated an...  
WO/2011/147868
Cementation room comprising at least one cementation cell provided in order to carry out a cementation of at least one first metal in at least one first aqueous phase in contact with at least one second metal in the solid state comprisin...  
WO/2011/147867
Hydrometallurgical reactor provided in order to carry out an extraction of at least one first metal initially present in a first oxidation state in an aqueous phase comprising: a reaction vessel, provided in order to contain the aqueous ...  
WO/2011/147871
The invention relates to a method for treating spent nuclear fuel which, among other advantages, does not require the operation of reductive back-extraction of plutonium. Said method can be used in particular in the treatment of uranium ...  
WO/2011/143764
A process for separating Co from Ni in an aqueous solution comprises subjecting the solution to extraction and using kinetic differences between Ni and Co in the extraction for achieving at least a partial separation of Co from Ni. This ...  
WO/2011/143689
A method (10) for the extraction and recovery of vanadium from its ores, the method (10) characterised by the steps of: (i) Acid leaching (12) of an ore containing vanadium and iron to extract vanadium and iron into solution; (ii) Passin...  
WO/2011/145644
Disclosed is a method that can reduce the production of substances adhering to the inner walls of reaction vessels, pipes, and the like without impairing the recovery rate of nickel, and that can reduce the frequency of performing operat...  
WO/2011/145688
Disclosed is a method for efficiently producing iron (III) ions from an acidic solution that contains iodide ions and iron (II) ions, while separating and recovering the iodine content. The method serves as a method for processing an aci...  
WO/2011/145760
In the circulation of electrolyte in a vertical-cylinder-type electrolyzer having a three-dimensional filling cathode made of active carbon granules and a fixed granular catalyst layer, the leaching and precipitation of a precious metal ...  
WO/2011/140593
There is provided a process for extracting platinum group metals from a platinum group metal-containing material, in particular spent automotive catalyst. The process involves roasting said material under oxidative conditions and further...  
WO/2011/138272
The present invention is directed to a process for obtaining titanium dioxide by the sulphate process, in which process a titanium-containing starting substance is digested with sulphuric acid in order to obtain a solids-containing diges...  
WO/2011/135991
Disclosed is a valuable metal recovery method that has excellent valuable metal selectivity and recovery efficiency, and furthermore is capable of reusing materials that were used in the recovery of a valuable metal. The valuable metal r...  
WO/2011/137268
A method for recovering tellurium from a module comprising cadmium telluride, comprises: contacting the module comprising cadmium telluride with an electrolyte solution at a pH greater than about 9; contacting a counter electrode with th...  
WO/2011/134402
Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation; then dissolving it by using hydrochloric acid to obtain hydrochloric acid leacha...  
WO/2011/134403
Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation, then dissolving it by using hydrochloric acid (2) to obtain hydrochloric acid le...  
WO/2011/132729
Disclosed is a method for producing a crystalline iron arsenate starting material liquid that can efficiently separate copper and arsenic from smoke and ash generated by nonferrous smelting and can provide an arsenic solution that substa...  
WO/2011/132693
By means of installation improvements specifically in a liquid-storage tank from among sulfidation installations at which a sulfidation reaction is performed in the hydrometallurgy of nickel oxide ore, the present disclosures reduce the ...  
WO/2011/130866
The invention relates to a lyophilized powder product for processes of bio-lixiviation or bio-oxidation of mixed or pure minerals, which includes a microbial consortium of microorganisms selected from groups of native microorganisms and/...  
WO/2011/132705
Disclosed is a treatment agent that can efficiently remove heavy metals from contaminated water by putting a treatment agent into contact with contaminated water, wherein the treatment agent comprises a compound — that reduces the pH o...  
WO/2011/132740
Disclosed is a system and method for recycling rare metals, which separates and collects rare metals by making use of chemical actions in an efficient combination of adsorption and separation, thereby reducing work load and improving wor...  
WO/2011/132282
A lithium recovery device is provided with which, when lithium is separated and recovered, high-purity lithium can be efficiently recovered and which can be easily and cost-effectively scaled up to an industrial level. The lithium recove...  
WO/2011/128061
The invention relates to a treatment and use involving a metal scavenger, such as functionalised organic or inorganic material, and a process to selectively remove specific metal ions and complexes from a stream containing a range of met...  
WO/2011/129395
Disclosed is a plant for wet smelting of laterite nickel ore which can minimize stops of a processing facility even in the event of a serious trouble in the processing facility, the processing facility requiring a great deal of preparati...  
WO/2011/126375
This invention relates to a method for extraction of elements from carbonate-containing minerals with limited use of mineral acid and small discharges of CO2. The method comprises crushing the mineral to particles, submerging the crushed...  
WO/2011/120127
In various aspects, the invention provides processes that use relatively low levels of acid to leach lean nickel ores, including processes that provide relatively high levels of extraction of nickel and cobalt from nickel laterite ores, ...  
WO/2011/120826
The invention relates to a method for determining the quantity of magnetic or ferromagnetic particles in a suspension (3) flowing through a control chamber (2), wherein the magnetic flux is measured by means of a measuring coil (8) surro...  
WO/2011/116426
A process for leaching uranium from a refractory uraniferous mineral including the step of treating a slurry containing said uraniferous mineral and ferrous ions in a reactor with an acid and an oxidant to increase the ORP in the reactor...  
WO/2011/117524
The invention relates to a method for recycling a used surface treatment bath, containing trivalent chromium and laden with at least one polluting cation. Said method is characterized in that it includes a step (1200) of liquid-liquid ex...  
WO/2011/113080
A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidising species in ...  
WO/2011/113997
The invention relates to a method and a reactor for purifying solid matter from the process solution (2) in the fluidized bed in the reactor, into which the process solution is fed to form the fluidized bed (4) in the essentially cylindr...  
WO/2011/114000
A hydrometallurgical method of processing nickel containing raw material such is provided. The raw material is leached in chloride-based leaching media in a process integrated with chlorine-alkali electrolysis, solvent extraction and ele...  
WO/2011/114824
Tin characterized in that a melted and casted sample thereof has an α-dose less than 0.0005 cph/cm2. With the recent tendency toward high-density and high-capacity semiconductor devices, the risk of soft errors caused by α-rays emitted...  
WO/2011/111407
Disclosed is a wastewater treatment method for selectively eliminating manganese from wastewater that is acidic due to sulfuric acid and contains aluminum, magnesium and manganese. The wastewater treatment method controls the precipitati...  
WO/2011/107802
A method of recovering vanadium, nickel and molybdenum from heavy crude oil refinery residues comprises pyrolysis and combustion of the residues at temperatures up to 900°C to produce an ash, converting the ash to an aqueous slurry comp...  
WO/2011/104798
Provided is a valuable-metal recovery method for recovering metals from lithium ion batteries using comparatively simple equipment and without using a cumbersome process. In said method, a positive electrode material from lithium ion bat...  
WO/2011/104436
The invention relates to the hydrometallurgical treatment of laterite ores in order to recover valuable metals. More specifically, the invention presented relates to a method for improving precipitation and solid-liquid separation in con...  

Matches 401 - 450 out of 4,041