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8163063 |
Method of leaching copper sulfide ore with the use of iodine
An object of the present invention is to provide a method of efficiently leaching copper from a copper sulfide ore containing chalcopyrite or enargite as a main constituent under versatile...
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8158102 |
System, device, and method for mixing a substance with a liquid
A system, device, and method for mixing a substance with a liquid pumps the liquid into a container of the substance to produce a solution. The container may be part of a container assembly...
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8114371 |
Process for production of precipitated silica from olivine
Process for the production of precipitated silica from olivine including the following steps: providing olivine particles with a particle size preferably below 1 mm in diameter,preferably mixing...
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8029751 |
Reduction of lime consumption when treating refractory gold ores or concentrates
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by a number of mechanisms, including control of the oxidation...
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8020710 |
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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7959730 |
Method for processing silicon powder to obtain silicon crystals
Embodiments of the present invention relate to a process for obtaining silicon crystals from silicon. The method includes contacting silicon powder with a solvent metal to provide a mixture...
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7837760 |
Process to increase the bioleaching speed of ores or concentrates of sulfide metal species, by means of continuous inoculation with leaching solution that contains isolated microorganisms, with or without presence of native microorganisms
The invention publishes a process to increase the bioleaching speed of ores or concentrates of sulfide metal species in heaps, tailing dams, dumps, or other on-site operations. The process is...
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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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7785560 |
Purification of finely divided, pyrogenically prepared metal oxide particles
Process for removing halide compounds adhering to finely divided metal oxide particles by means of steam, wherein the metal oxide particles are applied to the upper part of an upright column and...
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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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7754186 |
Oxides extracted from vegetal matter and process therefor
The invention concerns a process for the extraction of acid or basic oxides contained in a vegetal matter, more specifically it concerns the extraction of silica from rice husks. The invention also...
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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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7727510 |
Method of and apparatus for simulating a biological heap leaching process
A microbiological heap leaching simulation process wherein material, representative of ore in a heap, is microbiologically leached in a housing and the temperature of the material at a plurality of...
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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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7635424 |
Method of capturing mercaptans contained in a natural gas by concentration
The mercaptan-laden natural gas is contacted with a mercaptan-adsorbing sieve T1. The mercaptan-rich gaseous effluent obtained upon regeneration of sieve T2 is then contacted with an...
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7572433 |
Oxides extracted from vegetal matter and process therefor
The invention concerns a process for the extraction of acid or basic oxides contained in a vegetal matter, more specifically it concerns the extraction of silica from rice husks. The invention also...
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7556095 |
Solution mining dawsonite from hydrocarbon containing formations with a chelating agent
A method for treating an oil shale formation comprising dawsonite includes providing heat from one or more heaters to the formation to heat the formation. Hydrocarbon fluids are produced from the...
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7549470 |
Solution mining and heating by oxidation for treating hydrocarbon containing formations
A method for treating an oil shale formation comprising nahcolite includes providing a first fluid to a portion of the formation. A second fluid is produced from the portion. The second fluid...
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7527771 |
Dissolving metal particles from supported catalyst using ultrasonic energy, solvent and etchant
A sample preparation method for characterization of nanoparticles embedded in the supports of heterogeneous catalysts, with improved particle dispersion, is introduced. The supported catalyst is...
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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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7494641 |
Extraction process for removal of impurities from an oxidizer purge stream in the synthesis of carboxylic acid
Disclosed is a process that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid. The process involves...
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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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7449591 |
Process of removing transition metals
A process of diminishing the concentration of a transition metal complex from a first solution by adding a solubility-enhancing compound that enhances the solubility of said complex in a second...
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7410632 |
Extraction process for removal of impurities from mother liquor in the synthesis of carboxylic acid
A method for removing impurities from a mother liquor comprising a carboxylic acid, a metal catalyst, impurities by (a) evaporating the mother liquor comprising a carboxylic acid, the metal...
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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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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;...
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7351396 |
Extraction process for removal of impurities from an aqueous mixture
A method for removing impurities from an aqueous mixture or purified aqueous by extracting the aqueous mixture or purified aqueous mixture with an extraction solvent in an extraction zone to form...
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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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7282187 |
Recovery of metal values
A process for selectively extracting metal values, including, uranium, thorium, scandium and zirconium, from starting materials which include the metal values. The process is particularly well...
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7250185 |
Process for reducing the concentration of undesired compounds in a composition
A process for treating a composition comprising one or more undesired compounds and one or more desired compounds so as to reduce the concentration of the one or more undesired compounds is...
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7217400 |
Preparation of iron compounds by hydrothermal conversion
An apparatus and continuous process for the conversion of one solid iron compound to another solid iron compound in a heterogeneous suspension wherein the suspension is formed by dispersing a solid...
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7100994 |
Producing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation
A method for treating a hydrocarbon containing formation is provided. In one embodiment, heat from one or more heaters may be provided to at least a portion of the formation. Heat may be allowed to...
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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...
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7037482 |
Solvent extraction of a halide from a aqueous sulphate solution
A method of extracting a halide and sulphate from an aqueous sulphate solution, such as a zinc sulphate solution, comprises subjecting the solution to solvent extraction to extract halide and...
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6997518 |
In situ thermal processing and solution mining of an oil shale formation
An oil shale formation may be treated using an in situ thermal process. Heat may be provided to the treatment area. Fluids may be injected into the formation to remove a component within the...
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6884911 |
Material processing by repeated solvent expansion-contraction
A method for repeatedly converting a solvent from a state of solvent to a state of antisolvent with relatively little loss of solvent. The method is used to allow for processing of large amounts of...
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6852495 |
Process of extracting nucleic acid and process of simultaneously carrying out extraction and purification of nucleic acid
The present invention provides a process of extracting nucleic acid in a simple manner at a high efficiency with no use of any hazardous reagent from biological materials having required specific...
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6843976 |
Reduction of zinc oxide from complex sulfide concentrates using chloride processing
An apparatus and a process for producing zinc oxide from a zinc-bearing material are provided. The process comprises the steps of leaching the complex sulfide material with hydrochloric acid,...
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6773668 |
Detergent dispenser
A solid detergent dispenser for use with a dishwashing machine includes a chamber and a lid. The chamber is configured and arranged to receive a solid detergent having a particular composition. A...
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6649205 |
Solvent extraction
There is described a process for the extraction of at least one relatively polar component from a material which may be naturally occuring or a synthetic mixture, the process comprising the steps...
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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...
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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 20....
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6504077 |
Method for the decontamination of metallic surfaces
A method of decontaminating a radioactively contaminated oxide on a surface. The radioactively contaminated oxide is contacted with a diphosphonic acid solution for a time sufficient to dissolve...
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6497849 |
Synthesis of heteropolyacids
This invention relates to a process for purifying a heteropolyacid which comprises: subjecting an aqueous solution comprising (i) the heteropolyacid and (ii) salt impurities to at least one...
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6491892 |
Method for the extraction of a substance from a starting material
The starting material is conveyed in an extruder through zones of high and low pressure formed by different screw elements of opposing pitch. An extractant is fed in the high pressure zones located...
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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...
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6379919 |
Method for isolating thiocyanate resistant bacteria
The present invention relates to microbiological processes for the oxidative treatment of refractory gold and base metal ores and concentrates, and specifically, to bacterial inoculums for use in...
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6375923 |
Processing titaniferous ore to titanium dioxide pigment
A hydrometallurgical process is provided for producing pigment grade TiO2 from titaniferous mineral ores, and in particular from ilmenite ore. The ore is leached with a hydrochloric acid,...
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6333012 |
Process for producing ammonium metavanadate
A process is provided for preparing ammonium metavanadate from the combustion ashes resulting from the combustion of petroleum fuels in a boiler by using the ammonium sulfate and vanadium...
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