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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...
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7585475 |
Highly-conductive copper extractant formulations
A method of creating solvent extraction reagent formulations that have high conductivity by combining (a) phenolic oxime extraction reagent(s) or other extraction reagent(s) in the organic phase of...
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7531149 |
Synthetic control of metal oxide nanocrystal sizes and shapes
A general, reproducible, and simple synthetic method that employs readily available chemicals permits control of the size, shape, and size distribution of metal oxide nanocrystals. The synthesis...
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7494630 |
Method of stripping metals from organic solvents
A new method to strip metals from organic solvents in a manner that allows for the recycle of the stripping agent. The method utilizes carbonate solutions of organic amines with complexants, in low...
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7473413 |
Method for recovering metal values from metal-containing materials using high temperature pressure leaching
The present invention relates generally to a process for recovering copper and other metal values from metal-containing materials through pressure leaching operations. In accordance with the...
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7449160 |
Process of solvent extraction of copper
A process for efficient separation/recovery of copper involving selective extraction of the copper ion with the aid of an organic extractant from an aqueous chloride solution containing copper and...
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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...
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7390468 |
Extraction process
The invention relates to a method for the stabilization of the production capacity of an extraction plant extracting metals in a process, where the metal content of the feed solution varies. For...
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7309474 |
Composition and process
A solvent extraction composition is comprised of one or more orthohydroxyarylaldoximes and one or more othohydroxyarylketoximes, and one or more equilibrium modifiers in an amount providing a...
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7189380 |
Extraction of metals with diquaternary amines
Selective extraction of one or more metal anions from an aqueous solution, by contacting the aqueous solution with an organic solution including a diquaternary amine, wherein the diquaternary amine...
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7175818 |
Extraction of metals with diquaternary ammonium salts
Selective extraction of a metal anion complex, such as a platinum-group metal halide, from an aqueous solution containing other metal anions or anion complexes, by contacting the solution with a...
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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...
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7160525 |
Monodisperse noble metal nanocrystals
Nanoparticle compositions of noble metals, and methods of making them, are described. The nanoparticle compositions are made by reacting a salt or complex of a noble metal, such as Au, Ag, Cu or...
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7157022 |
Multivalent metal ion extraction using diglycolamide-coated particles
A separation medium, a method for using that separation medium and an apparatus for selectively extracting multivalent cations such as pseudo-lanthanide, prelanthanide, lanthanide, preactinide or...
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7147782 |
Method and apparatus for metal removal by ion exchange
The present invention provides a method for selectively removing metal ions of interest from a solution ( 12 ), such as the wastewater from a chemical mechanical polishing process. The method...
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7091525 |
Apparatus for producing a display unit
A display device is formed by burying at least part of a light emitting device in an insulating material, wherein a drive electrode for the light emitting device is formed so as to be extracted on...
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7048857 |
Method and apparatus for metal removal ion exchange
The present invention provides a method for selectively removing metal ions of interest from a solution ( 12 ), such as the wastewater from a chemical mechanical polishing process. The method...
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7025899 |
Concentrated solutions of oxime metal extractants and method of formulating extractant compositions therefrom
The preparation of concentrated solutions of oxime metal extractants, such as aldoximes and ketoximes, or mixtures of aldoxime and ketoxime, and the use thereof in formulating or preparing...
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7018593 |
Base metal recovery from a tailings dump by bacterial oxidation
A method of recovering base metal from a tailings dump which includes the steps of: aerating a surface layer of the dump; adjusting the pH and the moisture content of the surface layer to provide...
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7008601 |
Materials and methods for the separation of copper ions and ferric iron in liquid solutions
A silica-polyamine based extraction material removes selected transition metal ions from solution in the presence of iron ions. The silica-polyamine base is a reaction product of a polyamine and a...
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6919030 |
Process for recovering cyanide from copper-containing feed material
A process for recovering cyanide from feed material containing cyanide and copper involves the steps of: (a) contacting the feed material with a strong base anion exchange resin whereby copper and...
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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...
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6866833 |
Substituted thiourea complexing agent and a method for extracting a noble metal from a matrix using the complexing agent
A substituted thiourea having the general formula
characterized in that each of R 1 and R 2 independently comprises an alkyl, alkaryl or aryl group or a substituted derivative thereof, and...
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6846470 |
Methods for producing indium-containing aqueous solutions containing reduced amounts of metal impurities
A method for producing an indium-containing aqueous solution having a reduced amount of metal impurities is provided. A method for producing an indium-containing aqueous solution having a reduced...
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6736958 |
Ion sensing method
The present invention allows the determination of trace levels of ionic substances in a sample solution (ions, metal ions, and other electrically charged molecules) by coupling a separation method,...
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6733688 |
Composition and process for the solvent extraction of metals using aldoxime or ketoxime extractants
A solvent extraction composition is provided which comprises one or more orthohydroxyarylaldoxime or orthohydroxyarylketoxime and at least one dialkyl ester of an optionally substituted ethylene or...
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6726887 |
Composition of oxime and hydroxy-ester for the solvent extraction of metals
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...
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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...
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6702872 |
Processes for the recovery of copper from aqueous solutions containing nitrate ions
A process for the recovery of copper from a copper-containing aqueous acid leach solution containing nitrate ions, in which the leach solution is contacted with a solution of an oxime extractant in...
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6632410 |
Solvent extraction process
Copper is preferentially extracted from iron in an aqueous feedstock solution containing dissolved copper and iron values by contacting the feedstock solution with a water-immiscible organic...
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6632264 |
Gold recovery from thiosulfate leaching
Processes for recovering gold from copper-gold ores thiosulfate leaching or gold ores copper catalyzed thiosulfate leaching using ion exchange technology are disclosed. The processes include...
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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...
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6551378 |
Recovery of precious metals from low concentration sources
A process for the recovery of gold and the platinum group metals from sources that contain relatively low amounts of the metals is described. The process is environmentally acceptable and uses no...
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6521117 |
Method for metal recovery from aqueous solutions
The present invention is directed to an improved process for the recovery of metal ions from metal-containing aqueous solutions using a supported liquid membrane (SLM) whereby the pH of the...
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6471849 |
Process for the recovery of zinc from a zinc sulphide ore or concentrate
A processs for the recovery of zinc from a zinc sulphide ore or concentrate comprises the steps of subjecting the concentrate to pressure leaching with an acidic solution containing at least about...
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6455019 |
Process for the extraction of copper from a sulphide copper ore or concentrate
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...
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6364931 |
Separation of platinum group metals
A hydrochloric acid solution containing platinum group metals has its acidity adjusted to 5.5 to 6.5M HCl and its redox potential adjusted to at least 500 mV, before being treated by...
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6344068 |
Process for recovering gold from thiosulfate leach solutions and slurries with ion exchange resin
A process for recovering gold from thiosulfate leach solutions and slurries in which gold is loaded into an ion exchange resin. Gold is recovered from the resin by elution with polythionate ions...
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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...
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6277300 |
Composition and use of composition for the extraction of metal values
A composition for use in extracting metals from aqueous solutions of metals salts comprises at least one o-hydroxyaryloxime containing at least 5 aliphatic or alicyclic carbon atoms and at least...
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6274104 |
Non-ferrous metal recovery method utilizing a melt sulphation reaction
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...
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6242625 |
Process for extracting copper values from copper containing ores
In an acid leach copper extraction circuit for leaching copper values from copper ores using a water-immiscible organic solvent solution containing a copper extractant and an acid strip solution,...
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6231784 |
Water insoluble composition of an aldoxime extractant and an equilibrium modifier
Alternative equilibrium modifiers for use with aldoxime extractants, such as hydroxyl aryl aldoxime extractants, employed in the process for extraction of metal values, particularly copper values,...
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6210647 |
Process of recovery of metals from aqueous ammoniacal solutions employing an ammonia antagonist having only hydrogen bond acceptor properties
An improved process for the extraction of a metal from an aqueous ammoniacal solution comprising: (i) contacting the aqueous ammoniacal solution with an extraction reagent comprised of a water...
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6203708 |
Ion exchange resin
An ion exchange resin comprising an ion exchange material dispersed or distributed throughout a polyurethane matrix. The ion exchange material is typically a second polymer which has been...
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6200545 |
Cyanide recovery by solvent extraction
The invention provides a process for recovering hydrogen cyanide from an aqueous solution by extracting the hydrogen cyanide into an organic solvent phase. The organic solvent may comprise a...
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6200364 |
Process for eluting precious metals from activated carbon
A process is disclosed for the recovery of gold and/or silver values from activated carbon, wherein they are adsorbed as cyanide complexes. The process uses an eluant containing sugar. The process...
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6179898 |
Aluminosilicate organic-inorganic polymer
An organic-inorganic polymer comprising aluminosilicate having grafted thereon an organic radical having a --SH or --S(--CH 2 ) n --S-- group wherein n is from 0 to 4.
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6177055 |
Process for extracting and recovering copper
A process for extracting and recovering copper from an aqueous solution containing copper values comprising: (a) contacting the aqueous copper bearing solution with an organic phase comprising a...
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6171564 |
Process for extraction of metal from an ore or concentrate containing nickel and/or cobalt
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...
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