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Matches 701 - 750 out of 3,911

Document Document Title
WO/2007/118257
Small magnetic particles are introduced into a solution which is subjected to a bioleaching process. The suspended particles are coated with a substance which has a selective affinity for, and which interacts with, a metal in the solutio...  
WO/2007/115377
A process for recovery of antimony and metal values from antimony- and metal value-bearing materials is provided. A coarse (typically >250-┬Ám) concentrate of the antimony- and metal value-bearing materials is provided. The coarse concen...  
WO/2007/115399
A method for recovering precious metals such as gold and silver from aqueous solution as solid is described The method includes mixing an aqueous solution (e.g, thiosulfate or thiocyanate lixiviant) containing precious metals with ferrou...  
WO/2007/118257
Small magnetic particles are introduced into a solution which is subjected to a bioleaching process. The suspended particles are coated with a substance which has a selective affinity for, and which interacts with, a metal in the solutio...  
WO/2007/117169
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/2007/112562
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/2007/109841
The present invention relates to an improved method for the recovery of metal values, in particular copper and gold, from a metal value-bearing material containing arsenic and/or antimony and a source of sulphate ions, by means of a high...  
WO/2007/106969
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/2007/105714
A method of recovering rare earth elements from a composition containing rare earth fluorides, characterized in that (1) hydrochloric acid, silicon oxide and a composition containing rare earth fluorides are mixed together, (2) the mixtu...  
WO/2007/104106
A trench leaching system (10, 10') including a tank (14) containing a charge of ore (50) flooded with a liquid solvent (94) up to the level of a gutter (90). A pump (42) recirculates the liquid solvent (94) upwardly through the charge of...  
WO/2007/102207
A process for recovering indium from an indium-containing solution obtained by collecting indium-containing matter having scattered during the production of ITO thin film to thereby produce an indium-containing metal, which process compr...  
WO/2007/103421
Wet-chemical methods involving the use of water-soluble hydrolytically stable metal-ion chelate precursors and the use of a nonmetal-ion-containing strong base can be used in a coprecipitation procedure for the preparation of ceramic pow...  
WO/2007/103083
In a method of extracting lithium from a lithium bearing mineral, the mineral is reacted with a basic material of sufficient strength to dissolve the mineral, in order to produce a product mixture containing lithium. The lithium is then ...  
WO/2007/103083
In a method of extracting lithium from a lithium bearing mineral, the mineral is reacted with a basic material of sufficient strength to dissolve the mineral, in order to produce a product mixture containing lithium. The lithium is then ...  
WO/2007/099536
An efficient process for purification of palladium from a palladium and rhodium mixture is described, which is based on the difference in uptake of the two metals into a strong anion exchanger polymer, e.g., a copolymer of polystyrene an...  
WO/2007/099536
An efficient process for purification of palladium from a palladium and rhodium mixture is described, which is based on the difference in uptake of the two metals into a strong anion exchanger polymer, e.g., a copolymer of polystyrene an...  
WO/2007/098603
A process for extracting gold from a gold-bearing ore. The process includes, first, providing a leaching liquor with thiosulfate anion and ethylenediamine. Next, the leaching liquor is contacted with the gold-bearing ore to form a pregna...  
WO/2007/099119
The present invention relates to a process for the acid digestion of metal-containing compounds by leaching by means of an aqueous leachant, wherein the aqueous leachant i) contains an alkanesulphonic acid and, if appropriate, sulphuric ...  
WO/2007/100847
The present invention provides a method for improving the recovery of cesium-131 (Cs-131) from neutron-irradiated barium (Ba) carbonate. The recovery process includes dissolution, precipitation and separation steps, wherein the separated...  
WO/2007/100847
The present invention provides a method for improving the recovery of cesium-131 (Cs-131) from neutron-irradiated barium (Ba) carbonate. The recovery process includes dissolution, precipitation and separation steps, wherein the separated...  
WO/2007/098613
A recovery process for at least one precious metal contained in an ore, includes: comminuting the ore to obtain particles smaller than a predetermined particle size; separating the particles into at least two groups, each group being cha...  
WO/2007/095689
A hydrometallurgical method (10) for precipitating iron as hematite at elevated temperature and pressure from a pregnant leach solution ("PLS") (12) containing nickel, cobalt and iron, the method comprising the steps of: (i) leaching a l...  
WO/2007/093666
The invention relates to a method for recovering gold in connection with the hydrometallurgical production of copper from a waste or intermediate product containing sulphur and iron that is generated in the leaching of the copper raw mat...  
WO/2007/092994
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/2007/093667
The invention relates to a method whereby copper is recovered from a copper sulphide ore containing pyrite. According to the method the ore is ground and leached into a solution containing sulphuric acid in atmospheric conditions by mean...  
WO/2007/090725
The present invention relates to solutions comprising water and at least one metal cyanide, with at least part of the water being obtained from wastewater which arises as depleted wastewater in a process for the winning of noble metals f...  
WO/2007/087698
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/2007/088010
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/2007/087675
A process for the recovery of base metals from an oxide ore, comprising the steps of: e) forming at least one heap (40) of the oxide ore containing the base metals to be recovered; f) irrigating the at least one heap (40) of oxide ore wi...  
WO/2007/085039
A method for the biodegradation of organic compounds in a Bayer circuit, the method including the steps of: treating a portion of the Bayer circuit to provide a pH of between about 8 and about 12 wherein the portion of the Bayer circuit ...  
WO/2007/079531
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/2007/079532
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/2007/080963
A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by...  
WO/2007/077290
The invention relates to a method for improving the leaching of a sulphidic concentrate that contains valuable metals in a hydrometallurgical fabrication process of said valuable metal. The purpose is to accelerate the oxidation of sulph...  
WO/2007/074360
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/2007/074360
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/2007/074129
The invention relates to a method for recovering ruthenium from a used ruthenium-containing catalyst which contains ruthenium as ruthenium oxide on a carrier material that is difficult to dissolve in mineral acid. Said method comprises t...  
WO/2007/074207
Sulphidic zinc concentrate usually also includes small amounts of rare metals such as indium and gallium. If the content of these metals in the raw material is sufficiently high, their recovery may be economically worthwhile. In the meth...  
WO/2007/071028
There is provided compounds of formula (I): wherein R1, R2, R3, X1, X2, X3, can represent various substituents and m, n, p can be of various different values. These compounds can be useful for forming complexes. These compounds can in fa...  
WO/2007/071021
The present invention relates generally to processes for mineral extraction and ore processing and more specifically, to processes for recovering iron as hematite from a sulfide ore material and to processes for recovering base metals fr...  
WO/2007/070974
A process for recovering solid magnesium sulfate hydrate from a source of magnesium sulfate in solution said process including the steps of: (a) providing a source of magnesium sulfate in solution that is derived from part of a process a...  
WO/2007/070973
A process of recovering magnesium oxide from a source of magnesium sulfate, said process including the steps of: (a) providing a source of magnesium sulfate in solution that is derived from part of a process that is associated with the l...  
WO/2007/071020
The present invention relates generally to processes for mineral extraction and ore processing and more specifically, to processes for recovering iron as a hematite product of high purity from a base metal containing ore material and to ...  
WO/2007/065198
A cover (10) for a mineral processing tank (12), the cover (10) comprising a plurality of segments (14) made of lightweight material connected together in a generally circular configuration, so as to be able to float on, and cover substa...  
WO/2007/053947
Precious metal recovery by thiosulfate leaching where thiosulfate lixiviant is generated in situ employing elemental sulfur generated from partial oxidation of sulfidic precious metal-bearing feed and/or employing reactants from processi...  
WO/2007/053919
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/2007/052801
The invention relates to production of lutile, which has high added value as refining raw material for metallic titanium, white pigment, photocatalyst, or functional coating material, with remarkably reduced energy and resource consumpti...  
WO/2007/045154
An alumina digesting apparatus, comprises the following devices: high pressure diaphragm pumps, double-pipe preheaters, pulse buffers, autoclaves with heating tube bundles, autoclaves and flash evaporators. The devices are connected succ...  
WO/2007/045034
A method for the recovery of metal values from a metal value-bearing material containing arsenic and/or antimony and a source of sulphate ions such as sulphide ore or concentrate is disclosed. In one form the method comprises the steps o...  
WO/2007/043657
It is intended to provide a technique whereby an organic material contained in polluted water or polluted soil, which contains a heavy metal together with the organic material, is biologically decomposed. Namely, a method of decomposing ...  

Matches 701 - 750 out of 3,911