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Matches 601 - 650 out of 3,388

Document Document Title
WO/2008/155451A1
The invention relates to a method for recovering cobalt and copper from a cobalt-containing copper concentrate in a pyrometallurgical treatment process. Blister copper is formed in a suspension smelter and/or converter, and is conveyed t...  
WO/2008/138039A1
A process for the recovery of nickel and/or cobalt from laterite or partially oxidised lateritic ores having a substantial proportion of the iron present in the ferrous state, said process including the steps of : a) providing a laterite...  
WO/2008/138038A1
A process for leaching nickel and/or cobalt containing laterite or partially oxidised laterite ore including the steps of : a) providing a laterite or partially oxidised laterite ore; b) leaching the ore in a leach step with an acid in t...  
WO/2008/137022A1
An improved method for processing of nickel bearing saprolite and limonite ores to recover the valuable minerals contained therein, comprising leaching the ore with nitric acid to form a slurry; separating the iron values by precipitatio...  
WO/2008/128278A2
A method for the separation of nickel and iron from an acidic iron-containing nickel solution containing at least some dissolved iron in the ferric [Fe(III)] state comprises conducting a crude precipitation to precipitate some of the iro...  
WO/2008/124904A1
The present invention relates to a process which comprises the following stages: (a) beneficiation or preparation of ores containing nickel and/or cobalt and other base metals; (b) ore leaching: can be performed in various ways and combi...  
WO/2008/122526A1
In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution contain...  
WO/2008/119695A1
The invention describes a method for recovering molybdenum, nickel, cobalt or their mixtures from used or regenerated catalysts in an electric arc furnace containing a heel of liquid cast iron, surmounted with a fluid slag, comprising th...  
WO/2008/101414A1
A process for extracting metals from laterite containing Ni and Co comprises (1) mixing laterite with a sulphur-containing material selected from elemental sulphur and metallic sulphide, calcining the obtained mixture in an oxidizing atm...  
WO/2008/102240A1
An electrode of a secondary battery is treated to remove an electrode material adhering to the current collector of the electrode. The electrode is treated by exposing to a stripping agent, which is constituted as an aqueous solution con...  
WO/2008/080209A1
The present invention relates to a process for obtaining nickel, cobalt, and other metals from ores containing them, as well as from the product obtained at any of its stages, as follows: (a) preparation or pre-treatment of the ore for i...  
WO/2008/059439A1
A method of treating value bearing material comprising oxidised or surface oxidised mineral values includes the steps of crushing the value bearing material, contacting the crushed material! with a sulfide solution to sulfide the oxidise...  
WO/2008/055335A1
The process, according to the invention, comprises the following stages: (a) processing (1) of the laterite ore (O) by crushing, scrubbing, attrition, separation, and high-intensity magnetic separation; (b) Leaching (2) of the non-magnet...  
WO/2008/057670A2
The invention is a process for treating an iron-containing waste stream. The process comprises dividing the waste steam into a first and a second stream, then adding a neutralization agent (e.g., calcium hydroxide) to the first stream to...  
WO/2008/049177A2
"Method for production of metallic cobalt from the raffinate from solvent extraction of nickel". Said method comprises the following stages: (A) obtaining the raffinate from solvent extraction of nickel, for production of cobalt; (B) add...  
WO/2008/034189A1
A method for recovering nickel, a nickel compound or a mixed nickel and cobalt compound comprising: (a) providing a nickel-containing leach solution in which nickel is dissolved in a solvent; (b) subjecting the leach solution to nano-fil...  
WO/2008/034198A1
The present invention relates to a resin which is a copolymer of a polystyrene and a non-styrenic polymer, wherein the non-styrenic polymer includes the following subunit: Formula (I) wherein Rb is a divalent linking group, preferably al...  
WO/2008/031897A1
The invention relates to a process for recovering Group VIB metals from a catalyst, in particular a spent bulk catalyst, comprising one or more Group VIB metals and one or more Group VIII metals. Further, the invention relates to a solid...  
WO/2008/031203A1
Nickel entrained in the sulphide mineral pyrrhotite is engineered to dissolve in leaching acid in a two step procedure. First, a slurry of the mineral and the acid is activated by oxidation. This is done in a time Tl by electrolysis; or ...  
WO/2008/029009A1
Process for the treatment of a lateritic nickel/cobalt ore consisting of a mixture (2) of limonite and saprolite, characterized in that: the mixture (2) in the presence of an iron-precipitating agent is made into a pulp (1), having a sol...  
WO/2008/022381A1
A process for producing a metallic nickel product with a low iron content, including the steps of: (i) providing an acidic product liquor containing at least nickel and iron; (ii) subjecting said acidic product liquor to an ion exchange ...  
WO/2008/022395A1
An improved hydrometallurgical method (10) for the extraction of nickel from laterite ores, the method comprising the method steps of: i) Forming at least one primary heap (20) from nickel laterite ore material; ii) Leaching the primary ...  
WO/2008/019633A1
This invention relates to non-ferrous hydrometallurgy and, in particular, to the thickening of aqueous lateritic-ore pulps in pressurized acid technology. A novel process has been developed with a view to increasing the percentage of sol...  
WO/2008/009433A2
The present invention relates to a method for reducing metalliferous material to a reduction product. The invention also relates to an apparatus for reducing metalliferous material to a reduction product.  
WO/2008/003152A1
The present invention concerns a process for the instantaneous control of the precipitation of nickel and cobalt present in a leach liquor by adjustment of the pH-value. Said leach liquor is obtained by pressurized acidic leaching of lat...  
WO/2008/000810A1
The invention relates to a method for decomposing superalloys, especially superalloy scraps in an alkali metal salt bath and then recovering the precious metals, very precious metals such as tungsten, tantalum, and rhenium being recovered.  
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...  
WO2006069416A9
A process for the recovery of nickel and cobalt from an acidic resin eluate containing at least nickel and cobalt, said process including the steps of : (a) treating the eluate with an immiscible organic reagent (18) to selectively absor...  
WO/2007/117169A1
The invention relates to methods for extracting nickel and cobalt from ores and can be used for processing oxidised nickel and cobalt ores. The inventive method makes it possible to reduce the iron content in a produced nickel-cobalt con...  
WO/2007/112562A1
The invention provides hydrometallurgical processes by which dissolved nickel may be removed from water at ambient temperature and low system pressure The continuous process for precipitating nickel ions from a pregnant aqueous solution ...  
WO/2007/109976A1
A process for recycling Ni and Co from nickel oxide ore or nickel silicate ore, comprises the following steps: grinding nickel oxide or nickel silicate raw ore so that 80-90wt% of the ore has a grain size of -200 mesh; adding coke powder...  
WO/2007/106969A1
An essentially open-circuit process for recovering value metal species from a laterite-type feedstock, the process comprising the sequential or unsequential steps of separating the laterite-type feedstock into a first and a second fracti...  
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...  
WO/2007/099315A1
A process for reducing a metal-containing material, the process comprising: providing a metal-containing material (5), heating said metal-containing material by convective and/or conductive and/or radiative means (2), exposing said metal...  
WO/2007/095866A1
The invention relates to the processing of lateritic, nontronitic, limonitic, smectic and argillaceous minerals through the hydrometallurgical route specifically using pressurised acid technology, comprising the direct preparation of the...  
WO/2007/095865A1
The invention relates to the processing of lateritic minerals through the hydrometallurgical route specifically using pressurised acid technology, comprising treatment with H2SO4 of the tails from the pressurised acid leaching process at...  
WO/2007/092994A1
A process for the leaching of metals from highly oxidised laterite ores. The ore is admixed with an acidic aqueous medium, preferably a solution of sulfuric acid and the resulting mixture is treated with a sulfur reducing agent so as to ...  
WO/2007/092219A1
A method for refining non-ferrous metal wherein a stream of oxygen containing gas is provided from a lance (10) into the headspace (3) of a refining vessel (1) for passage to the molten metal bath (2) within the refining vessel, and a fl...  
WO/2007/087698A1
The present invention is directed to a hybrid process using ion ex- change resins in the selective recovery of nickel and cobalt of leaching effluents that is comprised of the steps of processing (1 ) the laterite ore (M), which is then ...  
WO/2007/088010A1
The present invention relates to the use of monodisperse, macroporous chelating resins in metal winning in hydrometallurgical processes, in particular in resin-in-pulp processes. According to the invention, the monodisperse, macroporous ...  
WO/2007/079531A1
A method (10) for the recovery of nickel and cobalt from leach solutions in the presence of iron and/or chrome, the method comprising the steps of: i) adding a reductant (13) to a leach solution containing nickel, cobalt and iron, such t...  
WO/2007/079532A1
A hydrometallurgical method for precipitating iron in the form of hematite from leach solutions containing nickel, cobalt and iron, characterised by the steps of: i) pre-neutralising (12) the leach solution by the addition of a neutralis...  
WO/2007/074360A2
A process is described for leaching a value metal from an ore containing said value metal, the process including the steps of leaching the ore in the presence of hydrochloric acid so as to form a soluble metal-chloride salt in a leach so...  
WO/2007/071108A1
A process of producing superfine cobalt powder with circulation technology is provided, which synthesizes Co-compound precursor by means of twice extracting and atomization hydrolyzing, then the Co-compound precursor is subjected to expl...  
WO/2007/053919A1
The combined leaching process comprises a dissolution process of the soluble constituents of an ore by means of the combined execution of two or more serial leaching phases with the first phase comprising atmospheric leaching (AL) and th...  
WO/2007/042604A1
The invention relates to a method for the sulphate-based leaching of metal sulphide minerals, such as chalcopyrite, CuFeS2, containing ore in atmospheric conditions. It is beneficial for the leaching of metal sulphides that the sulphide ...  
WO/2007/039664A1
The present invention relates to a new hydrometallurgical method for recovering nickel from nickel sulphide bearing raw materials, such as sulphide concentrate or ore. In general, the process involves the oxidative atmospheric pressure l...  
WO/2007/039663A1
The present invention relates to a new hydrometallurgical process for recovering nickel from nickel bearing raw materials, such as sulphide flotation concentrates. In general, the process involves the oxidative atmospheric pressure leach...  
WO/2007/039665A1
The invention relates to a method for processing a nickel product from nickel- bearing sulphidic raw materials, such as nickel sulphide concentrate or ore. According to the invention, the raw material is leached in atmospheric conditions...  
WO/2007/039938A1
A method of roasting in which both the C content and S content of roasted ore can be lowered to 0.5% or below and in which an Mo yield of 90% or higher can be ensured. For recovery of the valuable metals of V, Mo and Ni by reducing of a ...  

Matches 601 - 650 out of 3,388