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8114294 |
Multi-layered macromolecules and methods for their use
Multi-layered macromolecules wherein the layers are covalently bonded together and wherein the macromolecules are covalently bonded to solid particulate substrates, methods for the preparation of...
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8062614 |
Methods for improving the recovery of metal leaching agents
Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution...
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8030055 |
Method of biotreatment for solid materials in a nonstirred surface bioreactor
A method of biotreating and recovering metal values from metal-bearing refractrory sulfide ore using a nonstirred surface bioreactor is provided. According to the method, the surface of a plurality...
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8003066 |
Method for scrubbing amine-type extractant
A method for scrubbing an amine extractant (A) containing an amine added with hydrochloric acid, and an amine binding a metal chloro complex ion, in a scrubbing stage constituting a solvent...
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8003064 |
Controlled copper leach recovery circuit
The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of...
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7993613 |
More efficient ether modifiers for copper extractant formulations
The disclosed invention provides water-insoluble, water-immiscible extraction reagent compositions comprising an extractant reagent comprising one or more aldoxime extractants, optionally including...
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7959812 |
Multi-column sequenced separation process for separating an ionic metal derivative
The subject of the present disclosure is a multi-column sequenced separation process and a drive for implementing this process. The disclosure applies particularly to the separation of metal...
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7837959 |
Synergistic solvent extraction process
A process for separating one or more metal ions forming a first group of metal ions such as copper, zinc and ferric ions, from one or more other metal ions forming a second group of metal ions such...
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7807058 |
Method and composition for sorbing toxic substances
Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides...
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7799294 |
Methods for improving the recovery of metal leaching agents
Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution...
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7794677 |
Reduction of copper content in the molybdenite concentrate
Methods and systems for removing copper minerals from a molybdenite concentrate. One embodiment provides leaching copper from the molybdenite concentrate with a leaching solution comprising ferric...
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7763566 |
Method and composition for sorbing toxic substances
Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived...
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7736487 |
Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solution extraction
The present invention relates generally to a process for recovering copper and/or other metal values from a metal-bearing ore, concentrate, or other metal-bearing material using pressure leaching...
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7731853 |
Method and equipment for purifying an extraction solution from aqueous entrainment and impurities
The invention relates to a method and equipment with which an organic solution extraction solution is purified from entrainment of aqueous solution and impurities during hydrometallurgical...
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7722841 |
Polymeric chelant and coagulant to treat metal-containing wastewater
The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing...
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7682581 |
Method for the removal of copper from a zinc sulphate solution
The purpose of the invention is to remove copper selectively from a concentrated zinc sulphate solution by ion exchange. The method enables a significant reduction in the use of zinc powder during...
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7678275 |
Method and equipment for liquid-liquid extraction
The invention relates to a method for reversing the dispersion formed in the mixing section of liquid-liquid extraction and kept condensed in the separation section and the separated solutions form...
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7635457 |
Method for heap and dump leaching coupled with solvent extraction for metal recovery
The disclosed invention provides a process for enhanced recovery of one or more metal values from heap and/or dump leaching of ores containing the metal values, the process comprising: (a)...
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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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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 R1 and R2 independently comprises an alkyl, alkaryl or aryl group or a substituted derivative thereof, and contains...
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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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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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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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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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