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WO/2001/048252A1 |
The present invention relates generally to a method of extracting cobalt and other impurity metals from a concentrated nickel sulphate solution by a solvent extraction process whereby a cationic solvent extractant is separately pre-equil...
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WO/2001/046482A1 |
A method of producing an iron-nickel alloy, with a nickel content of from 5% to 20%, which includes the step of reducing the iron oxide content of a slag in a DC arc furnace to less than 10%.
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WO/2001/034857A1 |
The invention relates to a method for the precipitation of nickel from an aqueous solution containing its sulphate as a metallic powder suitable as an alloying element for refined steel. In this method, nickel reduction takes place conti...
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WO/2001/034859A1 |
The invention relates to a method for the precipitation of nickel from its aqueous solution as a metal powder using hydrogen. The aqueous solution containing nickel compounds is neutralised first with an earth alkali or alkali compound s...
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WO/2001/032945A1 |
A process and apparatus for desulfurisation of nickel powder is disclosed in which the nickel powder is heated in a hydrogen-containing atmosphere to promote the formation of hydrogen sulfide gas. The hydrogen sulfide gas is then removed...
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WO/2001/032943A2 |
A process is provided for leaching nickeliferous laterite ores by hydrometallurgical methods at temperatures below the boiling point of the pulp and at atmospheric pressure from which high overall nickel and cobalt extractions are obtain...
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WO/2001/029276A1 |
A process is provided for the direct recovery of nickel and cobalt from a nickeliferous oxide ore leach slurry by ion exchange. A nickeliferous ore is leached with mineral acid to solubilize the metals. The resulting leach slurry is cont...
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WO/2001/023067A1 |
Compositions and methods for selectively binding metal ions from source solutions are disclosed. The compositions include 1) polyamide-containing ligands covalently bonded to a particulate solid support, and 2) polyamide-containing polym...
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WO/2001/016384A1 |
The invention provides a hydrometallurgical process for treating metal-containing sulfide ores and concentrates, comprising reacting said metal-containing sulfide with concentrated sulfuric acid at a temperature of between about 300 °C ...
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WO/2001/012288A1 |
A process for the recovery of nickel from a nickel containing orein which the ore, particularly a laterite ore, is initially leached with an aqueous acid solution, after which the nickel is precipitated as nickel hydroxide by adding a hy...
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WO/2000/074856A1 |
The invention relates to a method for preparing nickel concentrate from pyrrhotitepentlandite ore. The method comprises grinding the ore to the maximum grain size at which the major portion of the sulphide minerals is worked off from the...
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WO/2000/073520A1 |
A process for selectively extracting a value metal from a ferrous solid, the value metal being selected from the group consisting of cobalt, nickel and copper, and the ferrous solid being selected from mattes and alloys containing iron a...
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WO/2000/070104A1 |
The present invention relates to a method, whereby the non-ferrous metal content of the slag generated in the production of non-ferrous metals such as copper or nickel in a suspension smelting furnace is reduced by charging metallurgical...
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WO/2000/065114A1 |
The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated $i(in situ) by adding a reducing agent such as a carbonaceous material in th...
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WO/2000/056943A1 |
Disclosed herein is a process for selectively removing an iron constituent and a manganese constituent from a cobalt-bearing composition, in particular for removing iron and manganese impurities from cobalt-bearing leach solutions and el...
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WO/2000/056942A1 |
A process for the recovery of one or more metal values from a metal containing feed material, the process including the steps of: (a) subjecting said feed material to a pyrometallurgical treatment in which the feed material is smelted to...
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WO/2000/053820A1 |
A process is provided for the selective recovery from an impure solution of pure nickel and cobalt solutions, suitable for electrolysis of the respective metals. The impure solution may be that obtained from acid leaching of nickel/cobal...
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WO/2000/053825A1 |
The present invention pertains to the field of metallurgy and essentially relates to methods for producing cathodic nickel from copper- and nickel-containing sulphide raw materials. The method involves separating the fine matte by flotat...
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WO/2000/053819A1 |
The present invention pertains to the field of hydrometallurgy and essentially relates to methods for producing sulphate solutions that contain nickel and cobalt. The method involves processing the material using a solution of sulphuric ...
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WO/2000/048944A1 |
Disclosed and claimed are efficient methods for leaching minerals from ores using an acidic solution such as sulfuric acid. Additional factors which can improve mineral recovery include the use of an alkali metal halide, grinding the ore...
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WO/2000/039350A1 |
The invention relates to a method for extracting anions based on metals of the V group to the VII group of the periodic table from the aqueous solution thereof. To this end, compounds or general formula (I) are used as an extracting agen...
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WO/2000/036167A1 |
A solvent extraction composition is provided which comprises one or more orthohydroxyarylaldoximes or orthohydroxyarylketoximes and one or more esters substituted with a hydroxyl group, and preferably a water immiscible organic solvent. ...
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WO/2000/028093A1 |
The invention relates to recovering metals, such as nickel and cobalt, by phytomining or phytoextracting soils rich in metals wherein the desired metal is selectively accumulated in hyperaccumulator plants by adjusting the soil pH. The m...
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WO/2000/026432A1 |
A closed loop, carbon monoxide self-contained preferably continuous process and apparatus for the production of nickel or nickel coated objects by nickel vapour deposition (NVD), comprising placing an object (34) to be treated with nicke...
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WO/2000/025382A1 |
A method of recovering valuable metal from waste storage batteries includes the steps of physically classifying waste storage batteries to separate them into materials of positive and negative plates, and recovering valuable metal from t...
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WO/2000/009782A1 |
Invention relates to a method for the removal of sulfur from the leaching cycle of nickel processes such as leaching of nickel matte. According to the method, anolyte generated in nickel electrowinning is neutralized with the aid of a ca...
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WO/2000/006328A1 |
A process for manufacturing of metal powder from a halogen containing chemical compound of the metal. The process involves thermal treatment of the compound (A) within a closed reactor and in a non-oxidizing atmosphere so as to induce de...
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WO/1999/063121A1 |
The invention relates to a method for recovering non-ferrous metals, particularly nickel, cobalt, copper, zinc, manganese and magnesium, from materials containing said metals by converting said non-ferrous metals into sulphates by means ...
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WO/1999/047715A1 |
The invention relates to a method for transforming slag derived from non-iron metallurgy, especially of primary and secondary Ni and Cu foamed slags while recovering and/or enriching the non-iron metals and constructing synthetic puzzola...
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WO/1999/010546A1 |
A process for the solvent extraction of metals, particularly copper, from aqueous ammoniacal solutions is provided. The extractant is an orthohydroxyarylketoxime of Formula (1), wherein R?1¿ is a hydrocarbyl group, and R?2¿ is an ortho...
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WO/1999/009226A1 |
A process for the extraction of metal from an ore or concentrate which contains nickel and/or cobalt values and other metals, comprises subjecting the ore or concentrate to acid leaching under pressure at pH $m(F) 2 to obtain a liquor co...
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WO/1999/009225A1 |
A process for the extraction of copper from a sulphide ore or concentrate comprises the steps of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halide and sulphate ions...
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WO/1999/006603A1 |
A method for precipitating nickel and cobalt from an acid aqueous solution containing at least dissolved nickel, cobalt and manganese, the method including: adding solid caustic calcined magnesium oxide or freshly slurried caustic calcin...
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WO/1998/059080A1 |
Nickel/cobalt, as well as platinum and palladium metal family members are recovered from soil by growing $i(Brassicaceae) plants, specifically $i(Alyssum) in soil containing nickel/cobalt as well as other metals. The soil is conditioned ...
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WO/1998/038934A1 |
This invention is a cryoplasty catheter and method for preventing or slowing re-closure of a lesion following angioplasty. The cryoplasty catheter (10) includes a shaft (12) having proximal and distal ends and a dilatation balloon (14) d...
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WO/1998/037247A1 |
The present is a hydrometallurgical process for nickel and cobalt recovery, which involves leaching with ammonia-ammonium carbonate solution of the nickel and cobalt bearing mineral material, using a tubular reactor (4) with air or oxyge...
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WO/1998/026100A1 |
A bioleaching method is provided for recovering a nickel from an ore selected from the group consisting nickel-containing lateritic ores and nickel-containing sulfidic ores or concentrates thereof. Where the ore selected is a nickel-cont...
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WO/1998/022216A1 |
Cobalt and/or manganese is recovered from the ash obtained following incineration of the catalyst containing residue arising from the liquid phase oxidation of an aromatic carboxylic acid such as terephthalic acid. Recovery is effected b...
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WO/1998/014741A1 |
The invention relates to a method for adjusting the flow velocity of reaction gas and the dispersion air of pulverous solids when feeding reaction gas and finely divided solids to the reaction shaft (6) of a suspension smelting furnace f...
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WO/1998/008991A1 |
The recovery of nickel, cobalt and other metals by phytomining is described. Plants of the $i(Alyssum) genus are grown in nickel rich soil. The uptake of nickel is enhanced by maintaining specific soil conditions, including a concentrati...
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WO/1997/043023A1 |
A process for the recovery of nickel from a nickel containing ore in which the ore, particularly a laterite ore, is initially leached with an aqueous acid solution, after which the nickel is precipitated as nickel hydroxide by adding a h...
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WO/1997/028288A1 |
Copper and/or nickel sulphide ore concentrate of high intrinsic energy is smelted by exothermically reacting the ore concentrate with oxygen in an oxidation station (29) to produce the metal, or a low-iron matte, and sulphur dioxide. The...
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WO/1997/020958A1 |
The process for the recovery of cobalt product from a molten slag having cobalt- and iron-containing constituents, uses a top-submerged lancing injection furnace system. The slag is smelted in a furnace of the system by: (i) charging car...
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WO/1997/020954A1 |
Traditionally, processes to produce ferronickel, nickel iron and stainless steel are excessively multistepped, energy consuming, have refining difficulties and result in the formation of a slag, which cannot be usefully exploited as an a...
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WO/1997/007917A1 |
A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound...
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WO/1997/007248A1 |
The invention relates to a method for recovering nickel in one and the same process from two pyrometallurgically produced nickel mattes, one of which contains a remarkable percentage of iron. The leaching of iron-bearing nickel matte is ...
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WO/1997/004139A1 |
A method is provided for recovering nickel from high magnesium-containing lateritic ores which also contain iron. The ores which are referred to as saprolitic ores are subjected to leaching (2) with a mineral acid from the group consisti...
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WO/1996/041029A2 |
A process for the extraction of Ni/Co values from an ore or concentrate comprises the steps of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halide, copper and sulphat...
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WO/1996/041026A1 |
A process for the extraction of a metal from an ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containig halogen ions and a source of bisulphate or su...
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WO/1996/041025A1 |
A process for the extraction of nickel and cobalt from a laterite ore comprises the step of reacting the ore, in slurry form, with sulphur dioxide to convert the iron, nickel and cobalt in the ore to soluble sulphates and bisulphites in ...
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