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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 ...
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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 TiO 2 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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6306195 |
Process for the preparation of high grade synthetic rutile and pig iron
The present invention relates to an improved process for the preparation of high grade synthetic rutile from ilmenite with pig iron as a by-product. The process comprises subjecting ilmenite to...
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6284207 |
Process for producing high surface area material by controlled leaching of blast furnace slag
A material with high surface area can be obtained through the partial or total removal of CaO and MgO by acid leaching of blast furnace slag. This is accomplished by an improved process for...
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6224847 |
Process for the extraction of a compound by a fluorocarbon compound
A process for extracting a compound or composition of matter from a raw material containing that compound or composition as a constituent part is disclosed. The process comprises the steps of (1)...
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6214088 |
Immobilized bioreactor method for sulphidic minerals and other particulate solids
A method and apparatus for bioprocessing particles wherein particles are entrapped a porous material and have biologically active microorganisms on their surfaces. A liquid (carrying oxygen and/or...
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6197210 |
Process for treating brass components to substantially eliminate leachabale lead
A process for the treatment of brass components to reduce leachable lead therefrom when the components are exposed to water which includes the steps of first cleaning the brass components with a...
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6183720 |
Process and apparatus for producing high-purity chemicals for the microelectronics industry
A process for producing a high-purity liquid chemical is provided. A chemical gas is successively purified over first and second purification columns by passing, countercurrently, a scrubbing...
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6183710 |
Sodium cyanide paste composition
A sodium cyanide composition having a paste-like consistency is provided which comprises sodium cyanide, a base, water, and a rheology modifier. Also provided are processes for producing and using...
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6153535 |
Method for removing a thin film for a window glass
A method for removing a thin film, which comprises applying a powder or solution of a salt to a thin film formed on a substrate, followed by heating to remove the thin film at the applied portion,...
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6126720 |
Method for smelting noble metal
A method for refining noble metals has a silver treating process including a nitric acid leaching step of silver, a purification step of the leaching solution, an electrolytic decomposition step of...
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6042794 |
Process for producing anhydrous MgCl.sub.2
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6033637 |
Method for treating combustion ashes
A method is provided for treating ashes from the combustion of petroleum fuels by mixing the combustion ashes with water to produce a slurry; injecting either calcium oxide or calcium hydroxide...
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6022991 |
Hydrogen-free regeneration of dithiophosphorus metal extractants
This is a method of regenerating dithiophosphorus acids from disulfides containing sulfur--sulfur bonds, formed by oxidation of dithiophosphorus acids, such as sulfur--sulfur bonding of...
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6001327 |
Sealed-bladdered chemical processing method and apparatus
A method and apparatus which enables a complete multi-stepped chemical treatment process to occur within a single, sealed-bladdered vessel 31. The entire chemical process occurs without...
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5997833 |
Apparatus and process for purifying highly impure calcium hydroxide and for producing high-value precipitated calcium carbonate and other calcium products
A solution process for the purification of calcium hydroxide, particularly from hydrated carbide lime, which is subsequently used as a feed stock for a high-value calcium product, preferably...
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5989508 |
Liquid medium extraction purification method
Method of purification by extraction of at least one substance to be isolated from a liquid medium, comprising an addition to the latter of an organic compound, entrainable by a vapor, which has a...
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5882527 |
Method of accelerating the dissolution rate of accumulated filter cake by channeling gas bubbles through the cake
A process of dissolving solid waste material in packed beds comprises the addition to the packed bed of a solvent for the solid waste and a material which releases a gas on contact with the solvent...
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5877270 |
Water solvent extraction degreasing method and molded products produced therewith
A water solvent extraction degreasing method capable of reducing degreasing time without consideration of abrupt decomposition/vaporization and swelling caused by heat. An organic binder is removed...
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5846500 |
Process for purifying highly impure calcium hydroxide and for producing high-value precipitated calcium carbonate and other calcium products
A solution process for the purification of calcium hydroxide, particularly from hydrated carbide lime, which is subsequently used as a feed stock for a high-value calcium product, preferably...
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5830424 |
Method of extracting fluorine from minerals or mineral species
A method of extracting a mineral or mineral species comprising contacting the mineral or mineral species with a leachate solution which contains metal or metalloid ions capable of forming soluble...
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5759512 |
Regeneration of dithiophosphorus acid metal extractants
The invention provides a method of regenerating dithiophosphorus extractants such as dithiophosphoric acids, dithiophosphonic acids and dithiophosphinic acids from their sulfur-sulfur bonded...
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5744107 |
Process for removing heavy metals from soil
Heavy metals are efficiently removed from contaminated soil by a process which comprises leaching or washing the soil with a mild leachant solution. The leachant solution is comprised of an aqueous...
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5682593 |
Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate
Use of diethyl dodecylphosphonate (DEDP) for the extraction of acids and metal salts from aqueous solutions.
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5678242 |
Membrane extraction with thermodynamically unstable diphosphonic acid derivatives
Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and...
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5587142 |
Method of dissolving metal oxides with di- or polyphosphonic acid and a redundant
A method of dissolving metal oxides using a mixture of a di- or polyphosphonic acid and a reductant wherein each is present in a sufficient amount to provide a synergistic effect with respect to...
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5585086 |
Method for enhancing digestion reaction rates of chemical systems
The present invention is a method for enhancing reaction rates when digesting chemical systems which form passivating layers. Particles are introduced into a digestion fluid bath. Digestion is...
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