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7455716 |
High temperature heap bioleaching process
A heap is constructed with hypogenic copper sulfide bearing ore to include exposed sulfide mineral particles at least 25 weight % of which are hypogenic copper sulfides. The concentration of the...
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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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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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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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6926753 |
Non-biochemical method to heap leach copper concentrates
A procedure to agglutinate ore concentrations, which can be of copper, on a gravel heap, to be leached on a non-flooded bed which comprises: artificially adhering the concentrate to the surface of...
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6921426 |
Process of recovering copper from ore
A copper concentrate obtained by flotation of a high grade copper ore containing chalcopyrite as a main mineral constituent is leached at a temperature of 100° C. or higher, and under a pressure...
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6884280 |
Heat transfer in heap leaching of sulphide ores
A method of leaching sulphide mineral concentrates wherein heat generated by bioleaching of sulphide mineral concentrates in at least one reactor is transferred into a heap in which bio-assisted...
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6833020 |
Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed
A method of recovering copper from a copper bearing sulphide mineral which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21%...
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6792336 |
Learning-based controller for biotechnology processing, and method of using
The present invention relates to process control where some of the controllable parameters are difficult or impossible to characterize. The present invention relates to process control in...
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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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6743276 |
Method and apparatus for solar heating a mining leach solution
A method and apparatus for solar heating a leach solution prior to its distribution over an ore heap. The apparatus includes a heat absorbing mat having a series of individual heat absorbing tubes...
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6733567 |
Recovery of nickel from nickel bearing sulphide minerals by bioleaching
A method of recovering nickel from a nickel bearing sulphide mineral slurry which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess...
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6719822 |
Process for decontamination
Material is decontaminated of a pollutant by using perennial woody plants with the ability to accumulate the pollutant in the leaves in high concentrations. The decontamination is based on a...
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6458184 |
Recovery of zinc from geothermal brines
Improved methods are disclosed for the efficient and cost-effective recovery of zinc metal from zinc-containing brines. Zinc is first bound to an anionic ion exchange resin (IX) which has been...
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6428597 |
Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery
Methods and compositions for increasing the recovery of precious metals from ore during heap leaching operations are disclosed. The methods add polypropylene glycol and alkylphenol ethoxylate in a...
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6395061 |
Process for organic acid bioleaching of ore
A process for leaching an ore that contains nickel and magnesium includes mixing a microorganism that is capable of producing an organic acid, a nutrient, and an ore that contains nickel and...
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6375907 |
Hydrogen sulfide abatement with scale control and/or well acidizing
The emissions of hydrogen sulfide during the production of natural gas, oil or geothermal fluids from subterranean formations and the subsequent processing of these fluids is reduced by converting...
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6325840 |
Process for treating by-products from zinc smelting and the like
A process for treating zinc mine tailings wherein a series of wave tables and cone separators are utilized to remove various components from the zinc mine tailings, such as carbon, zinc, lead,...
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6312500 |
Heap leaching of nickel containing ore
A process is provided for heap leaching ore to recover nickel. The process is particularly effective for ores that have a tangible clay component (i.e., greater than about 10% by weight). 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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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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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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6149711 |
Method and apparatus for solar heating and distributing a mining leach solution
A method and apparatus for solar heating a leach solution prior to its distribution over an ore heap. The apparatus includes a distribution mat having a series of individual emitter tubes joined by...
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6146444 |
Method for recovering metal value from concentrates of sulfide minerals
A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from a crushed refractory sulfide ore, forming a...
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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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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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6096113 |
Integrated, closed tank biooxidation/heap bioleach/precious metal leach processes for treating refractory sulfide ores
A metal-containing refractory ore, such as refractory sulfide ore, is split into a first portion and a second portion. The first portion is partially biodigested by a sulfide-digesting...
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6086656 |
Method for improving the heap biooxidation rate of refractory sulfide ore particles that are biooxidized using recycled bioleachate solution
A method for improving the heap biooxidation rate of refractory sulfide ore particles that are at least partially biooxidized using a recycled bioleachate off solution is provided. The method...
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6053964 |
Apparatus and method for applying a leaching solution to ore
An apparatus for applying a leaching solution to a mass of ore includes a plurality of first tubes which are connected to a supply of leaching solution. Each of the first tubes is fitted with...
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5972073 |
Recovery of the components of group III-V material aqueous wastes
The present invention is directed to a method for separating the group III element component of a group III-V material from an aqueous waste containing a group III-V material to allow for their...
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5928406 |
Conversion of metal oxidation states by phytoreduction
The present invention provides a method for remediating soil contaminated with Cr(VI) by reducing the Cr(VI) to Cr(III) in the soil. The method involves contacting the contaminated soil with a...
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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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5914441 |
Biocatalyzed anaerobic oxidation of metal sulfides for recovery of metal values
A method and apparatus for anaerobic oxidation of metal sulfides in ores and concentrates. Base-metal and precious-metal ores and concentrates often contain metal sulfides, such iron sulfides...
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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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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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5800593 |
Method for rendering refractory sulfide ores more susceptible to biooxidation
A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from a crushed refractory sulfide ore, forming a...
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5709731 |
Slurry pipeline leaching method
A method for concurrently transporting and leaching metal values from an ore or concentrate containing said metal values from an originating site such as an elevated site to a delivery site...
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5683490 |
Solution mining of precious metals using aqueous, sulfur-bearing solutions at elevated temperatures
Metallic forms of gold and other precious metals can be dissolved and transported (mined) using an aqueous sulfide-bearing leach solution. Maximum sulfur fugacities are achieved in sulfide-bearing...
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5672194 |
Method and apparatus for extracting precious metals from their ores and the product thereof
A method and apparatus for extraction of precious metals from their ores and the product thereof. Oxidized ore comprising a precious metal is exposed to a leaching solution (lixiviant) comprising a...
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5632963 |
Process for the removal of impurity elements from solutions of valuable metals
A process is disclosed for removing impurity elements, such as arsenic, and if necessary antimony, iron or bismuth, from valuable metal containing, such as copper containing, strongly mineral acid...
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5626648 |
Recovery of nickel from bioleach solution
A bioleaching method is provided for recovering nickel from an ore selected from the group consisting nickel-containing lateritic ores and nickel-containing sulfidic ores or concentrates thereof....
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5571308 |
Method for recovering nickel from high magnesium-containing Ni-Fe-Mg lateritic ore
A method is provided for recovering nickel from high magnesium-containing lateritic ores which also contain iron. The ores which are referred to as saprolitic ores are subjected to leaching with a...
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5527382 |
Hydrometallurgical process for the treatment of copper bearing ore
A hydrometallurgical process for recovering copper from copper bearing ores or fractions, by a process of first wetting and sulfatizing the ore with controlled amounts of H 2 SO 4 and water,...
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5523066 |
Treatment of lead sulphide bearing minerals
A process is described for solubilizing lead contained in ores mineralized with sulphidic minerals by in-situ leaching with an acetic acid and acetate containing solution in presence of an oxidant....
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5503656 |
Metal recovery and recycling method and system
A system and method for recovering metal contaminants from soil, including a leaching subsystem and a metal recovery system.
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