|
Match
|
Document |
Document Title |
|
|
7615199 |
Method for the recovery of valuable metals and arsenic from a solution
The invention relates to a method for the treatment of material containing at least one valuable metal and arsenic to form a valuable metal-depleted scorodite sediment and a pure aqueous solution...
|
|
|
7534285 |
Method and apparatus for the recovery of refractory mineral ores
A method for extraction a metal from a mineral ore including a refractory ore contained in a metal. The method includes concentration of refractory ore followed by micronization of the concentrate...
|
|
|
7514050 |
Processing of acid-consuming mineral materials involving treatment with acidic biooxidation effluent
In one aspect the present invention provides a method of recovering gold from each of at least two different refractory gold-bearing sulfidic mineral materials. A first mineral material is...
|
|
|
7510593 |
Method for producing concentrates
The invention relates to a method for processing concentrates, particularly concentrates produced from copper sulfide-based ores. According to the method, the concentrate ( 4 ) to be processed,...
|
|
|
7491372 |
Procedure to leach copper concentrates, under pressure and at ambient temperature, by forming a reactive gel in a sulfate-chloride medium
A chemical process to leach copper concentrates in the presence of a concentrated solution of sulfates and chlorides. The process includes forming a high reactivity chemical paste containing a high...
|
|
|
7438874 |
Pressure oxidation leaching in the presence of an acidic solution of halide and sulfate ions from copper and base metal containing ore/concentrate
A process for the extraction of a base metal such as Ni, Co or Zn, from suiphide ore or concentrate containing copper and the base metal comprises the step of subjecting the ore or concentrate to...
|
|
|
7435405 |
Anti-oxidation method for sulfide minerals in sulfide ore
By suppressing oxidation of sulfide minerals in sulfide ore due to bacteria or the like, this invention prevents the elution of heavy metals from the sulfide ore, and reduces the decrease in...
|
|
|
7404937 |
Production of synthetic rutile by continuous leaching
A reactor 20 has a plurality of tubular downcomers 32, 34, 36, 38, 40 and risers 42, 44, 46, 48, 50 , joined by sections 86, 88 in a continuous serpentine path the tubes dimensioned to...
|
|
|
7374732 |
Leaching process
A process for the oxidative leaching of sulphide mineral species, the method characterised by the method steps of: leaching a slurry containing the mineral species in one or more reaction vessels;...
|
|
|
7351343 |
Copper metal recovery system
The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a...
|
|
|
7264781 |
Calcining plant and method
Particulate material to be calcined is conditioned and then introduced into a stream of flue gases which transport the material along a sloping drying duct while drying the material. The dried...
|
|
|
7219804 |
Flotation processing including recovery of soluble nonferrous base metal values
A method of flotation processing ores and other mineral materials containing soluble nonferrous base metal and sulfide minerals involves dissolving the soluble nonferrous base metal and...
|
|
|
7169371 |
Process for the treatment of molybdenum concentrate
A method of treatment or purification of a molybdenum concentrate also containing copper, comprises the step of subjecting the molybdenum concentrate to pressure oxidation in the presence of oxygen...
|
|
|
7157062 |
Inhibition of the depletion of metal values from pregnant lixiviant solutions
Methods for inhibiting depletion of mineral values from pregnant lixiviant solutions comprise contacting the requisite metal ore with a preg-robbing inhibition agent (PRIA) comprising (I) alkyl...
|
|
|
7066983 |
Method for thiosulfate leaching of precious metal-containing materials
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper...
|
|
|
7041152 |
Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
The present invention relates generally to a process for the production of sulfuric acid and liberation of precious metal values from materials containing sulfur through pressure leaching...
|
|
|
6969499 |
Bacterially assisted heap leach
A bacterially assisted heap leach characterized by the steps of: providing an ore heap to oxidize sulphide minerals therein; providing a biological contactor inoculated with ferrous iron oxidizing...
|
|
|
6896808 |
Recovery of metal values from aqueous solutions and slurries
The invention generally relates to a process for the recovery or removal of metal species from a solution or slurry comprising the steps of: a) contacting the solution or slurry with a polymeric...
|
|
|
6875254 |
Methods for detecting and extracting gold
Methods for detecting gold and quantitating gold in ore samples utilizing a gold-specific protein are provided, including methods for multiple sample handling. Also provided are methods for...
|
|
|
6833021 |
Method for treating precious metal bearing minerals
A method of processing a mineral composition comprising a refractory material the method comprising milling the composition to a particle size of P 80 of less than 25 microns and leaching said...
|
|
|
6818191 |
Autoclave control mechanisms for pressure oxidation of molybdenite
The process chemistry during the oxidation of molybdenite concentrates in an oxygen pressure leach can be controlled by regulating the amount of ferric iron and excess sulfuric acid recycled as...
|
|
|
6777511 |
Process for producing poly (meth) acrylates having reduced metal content
An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an...
|
|
|
6773487 |
Process for refining silver bullion with gold separation
A process is disclosed for refining silver bullion, i.e. raw silver containing generally more than 90% silver besides Se, Pb, Au, Cu and platinum group metals (PGM) as main impurities. The process...
|
|
|
6767522 |
Method for leaching sulfide-containing materials with microorganisms and use of sulphur-containing amino acids in leaching with microorganisms
The invention relates to an effective and environmentally safe process for the microbial leaching of sulfidic materials, particularly of sulfide ores such as pyrite, marcasite, chalcopyrite,...
|
|
|
6755891 |
Process for the treatment or removal of impurities in a hydrometallurgical extraction process
A Process for the treatment or removal of impurities, such as arsenic, antimony or bismuth, generated as by-products during smelting and refining of copper concentrates, comprises subjecting the...
|
|
|
6706186 |
Method for extracting copper from an aqueous solution
The invention relates to a method for extracting copper in liquid-liquid solvent extraction from aqueous solutions with a high sulphate content, by raising the viscosity of the extraction solution...
|
|
|
6641642 |
High temperature pressure oxidation of ores and ore concentrates containing silver using controlled precipitation of sulfate species
A method for the treatment of sulfide ores containing silver by pressure oxidation. The method includes the addition of a sulfate-binding material to reduce the formation of jarosite species during...
|
|
|
6608001 |
Catalyst and method of making micrometer sized spherical particles
A method for producing small spherical particles that are especially useful as catalysts and catalyst supports employed in chemical processes is disclosed. According to some embodiments, the method...
|
|
|
6599414 |
Solvent extraction processes for metal recovery
An improvement in the solvent extraction process for recovering metal values, i.e. copper, from acidic aqueous solutions containing copper and iron which may also include chloride, and more...
|
|
|
6582494 |
Recovery of nickel and copper from sulphide concentrates by bioleaching
A process for recovering nickel and copper from a concentrate which includes the steps of subjecting the concentrate to a treatment phase to produce a first leach solution which contains...
|
|
|
6576041 |
Method and apparatus for chemical processing
A system and method are disclosed after chemical processing involving agitation and/or mixing of components. In one embodiment, the chemical processing involves pressure oxidation and in another...
|
|
|
6569224 |
Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate
A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an...
|
|
|
6537796 |
Conversion of geothermal waste to commercial products including silica
A process for the treatment of geothermal residue includes contacting the pigmented amorphous silica-containing component with a depigmenting reagent one or more times to depigment the silica and...
|
|
|
6537440 |
Processing copper sulphide ores
A method for extracting copper from a mineral feed containing copper sulphide mineral 1 , which involves crushing and blending the feed 2, 6, 10 followed by leaching of the feed in an autoclave ...
|
|
|
6500395 |
Method for removing metals from air pollution control residues
A method for the treatment of air pollution control (APC) residues comprising the steps of washing the residues at least one time in an alkaline solution maintained at a pH not lower than about...
|
|
|
6482373 |
Process for treating ore having recoverable metal values including arsenic containing components
Roasting of ores with metal values such as precious metal ores for recovery of metal values with conversion of arsenic to an insoluble form in-situ in presence of an additive such as iron and in...
|
|
|
6461577 |
Two-stage bioleaching of sulphidic material containing arsenic
A method of leaching sulphidic material that contains metals and arsenic under oxidising conditions and with the aid of microorganisms is characterised by mixing the material with an acid aqueous...
|
|
|
6455018 |
Recovery of precious metal and other values from spent compositions/materials
Precious metal values, e.g., platinum, palladium and rhodium, and, optionally, other valuable elements, e.g., one or more rare earths and cerium in particular, are recovered from a wide variety of...
|
|
|
6440376 |
Method for dissolving noble metals out of segregated ores containing noble metals
A method for dissolving noble metals out of segregated ores containing noble metals, comprising: reducing noble metal oxides present to the individual metals in finely divided form; oxidating the...
|
|
|
6432871 |
Process for manufacturing a catalyst body for generating hydrogen and a catalyst body for generating hydrogen
A process for manufacturing a catalyst body for generating hydrogen having at least one thin, large-surface catalyst layer, through which the reaction mixture can be passed includes steps of...
|
|
|
6413296 |
Recovery of gold from refractory ores and concentrates of such ores
A method of increasing the leaching yield of gold in the cyanide treatment of refractory ores or concentrates of such ores, while delivering air in an alkaline environment at atmospheric pressure,...
|
|
|
6395063 |
Method and system for pressure oxidation of sulfide gold ores involving enhanced oxygen-sulfide contact
A system and method for recovering gold using pressure oxidation is disclosed. In one embodiment, a feed slurry is introduced into multiple compartments or stages of a multi-stage autoclave. In...
|
|
|
6383458 |
Biooxidation process for recovery of metal values from sulfur-containing ore materials
A process for the recovery of one or more metal values from a metal ore material comprising those of one or more values and a matrix material having a sulfur content wherein the sulfur is present...
|
|
|
6342190 |
Process for increasing recovery of precious metals in an ore processing operation
An ore separation process is provided which begins with a specially designed primary grinding mill. The primary grinding mill grinds the ore into a fine powder which is then blown into the primary...
|
|
|
6337056 |
Process for refining noble metals from auriferous mines
A process for refining noble metals from auriferous mines, wherein the auriferous material is first milled and treated with a cyanide solution, and comprising: a step for the pretreatment of the...
|
|
|
6315812 |
Oxidative pressure leach recovery using halide ions
A method for recovering a precious metal from a host material, comprises the steps of subjecting the host material to an oxidative pressure leach process, in the presence of a halide ion...
|
|
|
H002005 |
Process for leaching low sulphur content materials
Disclosed is a process for leaching low sulphur materials for recovery of metals contained in them. The process includes leaching a first low sulphur material containing metal values with a...
|
|
|
6290749 |
Preparation of ultra-pure silver metal
A method for preparing ultra-pure silver from a crude silver mixture containing metallic and/or non-metallic impurities, said method comprising; dissolving the crude silver mixture in nitric...
|
|
|
6290747 |
Conversion of impure silver halide to ultra-pure silver metal
A method for preparing ultra-pure silver from a crude silver halide matrix containing metallic and/or non-metallic impurities, said method comprising; roasting the crude silver halide matrix to...
|
|
|
6277341 |
Process for the rapid leaching of chalcopyrite in the absence of catalysts
A process is provided for the leaching of copper from chalcopyrite using ferric sulfate in which acceptable rates of leaching are achieved by controlling the surface potential of the chalcopyrite...
|