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7572418 |
Process to obtain titanium concentrates with high contents of TiO2 and low contents of radionuclide elements from anatase mechanical concentrates
A process for production of titanium concentrate with low contents of radionuclide elements from anatase mechanical concentrates. The process involves calcination in air and reduction with hydrogen...
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7559970 |
Method for producing metal nanoparticles and metal nanoparticles produced thereby
The present invention relates to a method for producing metal nanoparticles and metal nanoparticles produced thereby, in particular, to a method for producing metal nanoparticles used for inkjet...
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7501380 |
Compositions for the absorption of dissolved metals
A blended composition of hydrogel polymer granules capable of selectively removing toxic dissolved metal species from water containing abundant innocuous species, and spacer particles which...
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7268273 |
Recovering metals from soil
The invention relates to recovering metals, such as nickel and cobalt, by phytomining or phytoextracting soils rich in metals wherein the desired metal is selectively accumulated in...
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7214516 |
Bacterial effects on metal accumulation by plants
The invention includes methods for (1) extracting metals from soil by the use of plants that extract and accumulate the metal and adding bacteria to the soil that enhances the ability of the plants...
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7163570 |
Chromatographic method of separating ruthenium from platinum group metals
A chromatographic separation method separates ruthenium from other platinum group metals in a feed solution, by converting the Ru to a nitrosyl complex, retaining the nitrosyl complex temporarily...
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7078122 |
High efficiency process for treating mixed metal waste
A process for rendering hazardous materials present in multi-element waste non-hazardous, and for recovering valuable components of said waste, particularly metals, comprising contacting the waste...
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7069690 |
Compositions and methods for removing pollutants from contaminated wafer with a fern plant
Processes and materials for phytoremediating water-containing sites which have been contaminated with pollutants such as arsenic, phosphorous, or other metals. Fern plants can be used to accumulate...
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7066982 |
Contaminant removal by ferns via foliar-application and excised/ground fronds
Processes, methods, materials and compositions for phytoremediating contaminated waters, which have been contaminated with pollutants such as arsenic, phosphorous, or other metals. Fern plants can...
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7065920 |
Contaminant removal by additional ferns
Processes, methods, materials and compositions for phytoremediating contaminated waters, which have been contaminated with pollutants such as arsenic. Fern plants that include Pteris and non-...
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7049492 |
Thlaspi caerulescens subspecies for cadmium and zinc recovery
A cadmium and zinc hyperaccumulating subspecies from Thlaspi caerulescense and methods for removing or recovering cadmium and zinc from soils by cultivating the Thlaspi caerulescense subspecies...
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7044995 |
Purification of metals from mixtures thereof
A process for preparing a pure PGM (platinum group metal) from a material containing a plurality of PGM compounds, wherein the PGM is selected from the group consisting of Pt, Pd, Os, Ir, Ru, Rh...
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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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6958435 |
Methods for accumulating selenium in edible brassica
A method of producing edible Brassica plants capable of accumulating significant concentrations of selenium in edible portions of the plant. Edible Brassica plants were grown in an environment...
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6953120 |
Method of recovering metal and/or oxide thereof in a slurry and tailings obtained from said method
A method of recovering metal and/or oxide thereof from a slurry is described. The method involves magnetically separating at least a portion of any magnetic impurities from the slurry and then...
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6936090 |
Process for isolating rhenium
A process for elution of rhenium adsorbed on strongly basic ion-exchange resins by means of highly concentrated aqueous hydrochloric acid solution is described, in which the ion-exchange resin is...
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6932855 |
Method for recycling metals from swarf
A method for recycling metals from swarf includes steps of removing oil in swarf by means of surfactant having a feature of strong hydrophilicity. The steps involves repeated stirring and washing,...
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6905532 |
Process for the dissolution of copper metal
Process for producing a copper-containing aqueous solution, in which a copper mass is dissolved in the presence of an oxidant in an aqueous leach liquor containing monoethanolamine and (HMEA) 2 CO...
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6846346 |
Sulfatization process for metal extraction from sulfide ores
The invention provides a hydrometallurgical process for treating metal-containing sulfide ores and concentrates, comprising reacting said metal-containing sulfide with concentrated sulfuric acid at...
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6786948 |
Method for phytomining of nickel, cobalt and other metals from soil
The recovery of nickel, cobalt and other metals by phytomining is described. Plants of the Alyssum genus are grown in nickel rich soil. The uptake of nickel is enhanced by maintaining specific soil...
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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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6656722 |
Process for immobilizing arsenic waste
The invention provides a process for removing and immobilizing arsenic from an arsenic-containing waste. It comprises oxidizing the arsenic to pentavalent arsenic in an aqueous medium, contacting...
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6375909 |
Method for the removal of mercury and nitrogen oxides from combustion flue gas
The process is by injection of calcium chloride into the combustor and lowering the flue gas temperature in sufficient time to enhance oxidation of mercury and nitrogen oxides into more soluble...
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6324785 |
Process for harvesting organic compounds from plant roots
Organic compounds are recovered from the roots of living plants by treating said roots by an extraction with enzymes. The plant is removed from its growing medium, subjected to the extraction and...
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6280500 |
Methods for removing pollutants from contaminated soil materials with a fern plant
The subject invention provides materials and methods for remediating soil and/or water which has been contaminated with arsenic, phosphorous, or other metals. In a preferred embodiment, the subject...
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6267800 |
Process for producing cobalt metal powder from nickel-cobalt sulphides
A process for producing cobalt metal powder from nickel-cobalt sulphides wherein said nickel-cobalt sulphides are leached in an ammoniacal ammonium sulphate solution under an elevated pressure of...
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6241803 |
Method for manufacturing reduced iron pellets
A method for manufacturing reduced iron pellets comprises the steps of heating iron oxide pellets incorporating carbonaceous material to yield reduced iron pellets having an apparent density of not...
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6241800 |
Acid fluxes for metal reclamation from contaminated solids
A method of recovering contaminating or valuable components from a solid feed material (10), includes feeding the material (10) into an optional grinder as a pretreatment (12), then into a heated...
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6231636 |
Mechanochemical processing for metals and metal alloys
A set of processes for preparing metal powders, including metal alloy powders, by ambient temperature reduction of a reducible metal compound by a reactive metal or metal hydride through...
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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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RE36990 |
Chemical process for the recovery of metal from an organic complex
A method for the recovery of a metal from an organic complex thereof, said method comprising treating the complex with a weakly acid aqueous solution of an alkali metal, an alkaline earth metal or...
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6159270 |
Phytoremediation of metals
A process for removal of metal ions from soil and methods for effecting such removal are described. The process is based on manipulating the growth of crop and crop-related members of the plant...
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6156214 |
Process for removing mercury from alkali metal alkoxide solutions
A three-stage process for removing mercury contaminants from alcoholic alkali metal alkoxide solutions is provided, in which mercury is depleted in a first filtration through inert fibrous...
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6145244 |
Methods for enhancing phytoextraction of contaminants from porous media using electrokinetic phenomena
The present invention relates to a method of remediating soil, water, and other porous media contaminated with organic and/or inorganic contaminants using plants in conjunction with an electric...
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6139602 |
Carbon catalyzed leaching of metal-containing ores
Disclosed and claimed is an efficient process for extraction of metals from ores using carbon catalyzed leaching. Specifically exemplified is the extraction of cobalt and nickel from laterite ore.
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6131836 |
Methods for treating ores
Metals are rendered analyzable, extractable or recoverable from materials, such as complex or refractory ores, by applying shear deformation forces to the materials. The shear deformation forces...
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6106589 |
Method for treating noble metal complex ions
An agent for treating metal ions in an aqueous solution, which comprises an anthrahydroquinone compound and a metal supported on a carbonaceous carrier.
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5927005 |
Phytoremediation of heavy metals with creosote plants
Methods are described for the decontamination of soil containing heavy metals. In particular, these methods rely on phytoremediation using the plants of the species Larrea tridentata, the creosote...
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5917117 |
Inducing hyperaccumulation of metals in plant shoots
The present invention provides methods by which hyperaccumulation of metals in plant shoots is induced by exposure to inducing agents. Hyperaccumulation occurs as part of a two-step process in...
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5917116 |
Method for the processing of copper minerals
A method of processing a copper mineral, the method comprising activating the copper mineral by milling the copper mineral to P80 of between 2 and 20 micron, and subsequently subjecting the...
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5912402 |
Metallurgical dust recycle process
A treatment of metallurgical dust and recovery of valuable chemical commodities, comprising the steps of: leaching salts from the dust with water to create a washed EAF dust; reacting the washed...
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5885324 |
Method for the production of synthetic rutile
Synthetic Rutile is prepared from raw ilmenite ore by a method comprising activating ilmenite and subjecting it to a multi-stage countercurrent leaching process in hot hydrochloric acid.
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RE36118 |
Chemical process of separating metals from an organic complex
A method for the recovery of a metal from an organic complex thereof, said method comprising treating the complex with a weakly acid aqueous solution of an alkali metal or alkaline earth metal...
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5850064 |
Method for photolytic liquid phase synthesis of silicon and germanium nanocrystalline materials
A method is described for the liquid phase synthesis of particles. The particles are composed of silicon or germanium and are optionally produced at sizes such that the particles exhibit quantum...
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5830258 |
Method of recovering resources in resin-molded electrical rotating device
A method of recovering resources in a resin-molded electrical rotating device (1,2) in which electromagnetic members (1a,1b,2a) are molded with resin molding (1c,2c) with fine voids so as to be...
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5814125 |
Method for introducing gas into a liquid
A method for introducing gas into a liquid wherein a gas stream is ejected from a lance spaced above the liquid surface and directed from the lance onto the liquid surface. The gas retains...
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5807421 |
Hydrometallurgical extraction process
A hydrometallurgical process for treating copper feed materials containing gold and/or silver by simultaneously leaching copper, gold and/or silver into an aqueous cyanide solution, extracting...
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5792235 |
Method for recovering gold and other precious metals from carbonaceous ores
A method for recovering precious metals from carbonaceous ore comprising leaching the ore with a lixiviant solution and then preg-robbingly concentrating the precious metal-lixiviant complexes in...
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5759410 |
Process for recovering mercapto-s-triazines from silver precipitate
There is provided a process for converting a silver-mercapto-s-triazine precipitate to a solid containing silver and a solution containing mercapto-s-triazine by contacting the...
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5749940 |
Method for producing high grade reduced silver
The known method comprises the following steps. (1) the de-copperized anode slime is chlorination-leached with HCl and H 2 O 2 . (2) Na 2 CO 3 is added to the chlorination-leach residue of (1)....
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