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7578868 |
Metal recovery from a tank bioleaching solution with the use of coated magnetic particles
Small magnetic particles are introduced into a solution which is subjected to a bioleaching process. The particles are coated with a substance which has a selective affinity for, and 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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7250072 |
Removal of sulfur-containing impurities from volatile metal hydrides
Method for the purification of a volatile metal hydride comprising obtaining a volatile metal hydride feed containing one or more acidic impurities, one of which is a sulfur-containing impurity;...
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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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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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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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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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6818042 |
Method of mineral concentrate redress
A slurry of particulate ore material is concentrated to form a smeltable concentrate on a re-concentrator table arranged to separate concentrate ore at a concentrate discharge from middlings and...
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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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6656247 |
Selective precipitation of manganese from magnesium-containing solutions
A process is provided for selectively precipitating and removing manganese relative to magnesium from an acidic solution, preferably barren of one or more of cobalt, nickel, copper and zinc, but...
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6458183 |
Method for purifying ruthenium and related processes
The present invention provides a method for purifying ruthenium sources to obtain high purity ruthenium metal without the need for high temperature processing, expensive reagents, complex series of...
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6432166 |
Dust control
Process for the control of dust on ore handling points comprising applying to the ore an aqueous solution of an alkyl polyglucoside having an average of from 8 to 12 carbon atoms and a degree of...
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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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6372156 |
Methods of chemically converting first materials to second materials utilizing hybrid-plasma systems
In one aspect, the invention encompasses a method of chemically converting a first material to a second material. A first plasma and a second plasma are formed, and the first plasma is in fluid...
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6368381 |
Autoclave using agitator and sparge tube to provide high oxygen transfer rate to metal-containing solutions
The autoclave of the present invention includes an impeller having a conduit to recirculate or introduce a molecular oxygen-containing gas into the slurry. The outlets for the gas can be located in...
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6358895 |
Fluid treatment process
Non-aqueous functional fluids are treated to avoid degradation or to recondition degraded fluids by a process which comprises contacting the fluid with an anionic ion-exchange resin and...
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6302940 |
Chemical synthesis of monodisperse and magnetic alloy nanocrystal containing thin films
A method and structure for forming magnetic alloy nanoparticles includes forming a metal salt solution with a reducing agent and stabilizing ligands, introducing an organometallic compound into the...
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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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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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6207443 |
Method for initiating heap bioleaching of sulfidic ores
The process of the present invention "jump starts" heap biooxidation of sulfides by incorporating a previously biooxidized material into the heap. The process can be used to recover precious 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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6107065 |
Nonstirred bioreactor for processing refractory sulfide concentrates and method for operating same
A method of biooxidizing sulfide minerals in a nonstirred bioreactor is provided. According to the disclosed method, a concentrate of sulfide minerals is coated onto a plurality of substrates, such...
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5968229 |
Purification of metal containing solutions
A process for the purification of solutions containing metals comprising neutralization of the solution, reduction of Fe(III) present, and elimination of ingoing dissolved zinc, whereby the ingoing...
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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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5904783 |
Method for reducing lead leaching in fixtures
A method for treating a brass fixture having a fluid-contacting surface with lead dispersoids exposed thereon to reduce lead leaching into a fluid supply by contacting the brass fixture with a...
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5885327 |
Process for the recovery of gold
Recovery of gold from alkaline cyanide leach solutions using ion exchange adsorbents, comprising (a) contacting the cyanide leach solution containing the gold with an extraction reagent comprised...
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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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5873927 |
Integrated, tank/heap biooxidation process
A metal-containing refractory sulfide ore is split into a first portion and a second portion. The first portion is partially biodigested by a sulfide-digesting microorganism in a biooxidation...
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5829192 |
Method for focusing the growth of a vegetative root system to target a contaminated area
Root growth and development of vegetation used to remediate contaminated soil and/or groundwater is directed to targeted zones by a casing lining the hole in which the vegetation is planted. A...
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5829191 |
Method of growing and harvesting vegetation for use in remediating contaminated soil and/or groundwater
A method of growing trees for transplantation develops a long and narrow root system for ready rooting activity when transplanted at a remediation site. The trees can be grown in a lined hole with...
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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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5772730 |
Process for separating contaminants from organic phases during hydrometallurgical extraction of metals
A method of removing aqueous phase residues and other contaminants from the organic phase used in hydrometallurgical extraction processes comprises passing the organic phase through a column or...
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5769925 |
Process for the elution of precious metals absorbed on active carbon
A powerful reducing agent such as hydrazine monohydrate is added to the standard eluent solutions such as NsOH-NaCN with or without alcohol. The kinetics of elution of gold or of silver are thus...
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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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5728197 |
Reclamation process for tungsten carbide/cobalt using acid digestion
Tungsten carbide cobalt and tungsten-containing materials are recycled using a single high-temperature oxidation with standard dilution chemistry. The scrap material is ground, oxidized, and...
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5661117 |
Regeneration of phosphate ester lubricating fluids
A method of removing contaminated phosphate ester materials is provided. The method involves the use of an anionic resin and a polymeric sorbent. The contaminated phosphate ester material is passed...
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5623725 |
Process for producing very pure platinum materials, semi-finished parts and foils dispersion-reinforced with Y203
Process for producing very pure platinum materials dispersion-reinforced with Y 2 O 3 and having high strength and extensibility, even in the temperature range >800° C., from platinum powder...
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5468281 |
Process for the separation of cobalt from nickel
A process is disclosed for separating cobalt in the form of cobalt (III) hexammine sulphate from an aqueous solution containing cobalt (III) hexammine sulphate and nickel (II) hexammine sulphate...
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5352266 |
Nanocrystalline metals and process of producing the same
A process for producing nanocrystalline materials, and in particular nanocrystalline nickel having an average grain size of less than about 11 nanometers is described. The nanocrystalline material...
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5258167 |
Extractant for rare earth metal and method for extracting the same
An extractant for extracting rare earth metal ions comprises, for instance, di-(3-methylcyclohexyl)phosphoric acid, di-1-ethylpentylphosphoric acid, docosyl-(2 isopropyl-5-methylcyclohexyl)...
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5250102 |
Process for ther microbial oxidation of sulphidic wastes
A process for treating optionally oxidized sulphidic material containing one or more heavy metals, by aerobic microbial oxidation of the optionally oxidized sulphidic material in an aqueous...
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5093090 |
Process for separating antimony from acidic solutions containing same with an organic diluent containing a polyol
There is disclosed a method for the separation of antimony from acidic solutions which contain antimony, alone, or together with other metallic ions, by extracting antimony with an organic,...
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5019158 |
Process for the separation of calcium and nitrogen from lithium
A process is disclosed for separating calcium and nitrogen from lithium, in which alumina is added to molten lithium and reacts to produce aluminum and lithium oxide. The aluminum reacts with the...
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4976781 |
Mineral recovery process
Noble metal or diamond values are recovered from ore slurries by contact with pellets of oil, coal and bitumen as a secondary binder. The pellets are of a size above 0.75 mm and contain 2% bitumen...
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4389247 |
Metal recovery process
A process for recovering a metal in its elemental state from an oxide or salt of the metal comprising passing the metal oxide or salt and a reducing gas concurrently downward through a packed bed...
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4339302 |
Semiconductor materials
A Group III element Q selected from gallium, indium and thallium containing a Group VI element X selected from oxygen, sulphur, selenium and tellurium as an impurity can be purified by adding, to...
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