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WO/2011/161650 |
This invention relates to a froth flotation process to beneficiate uranium economically from both low grade tailings dump ores or high grade ores; by upgrading into a concentrate. The first stage is a sulphide flotation for pyrite recove...
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WO/2011/147871 |
The invention relates to a method for treating spent nuclear fuel which, among other advantages, does not require the operation of reductive back-extraction of plutonium. Said method can be used in particular in the treatment of uranium ...
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WO/2011/144937 |
The invention provides a process for the reprocessing of spent nuclear fuel, the process comprising the steps of: (a) electrorefining the metal to produce a liquid metal cathode comprising the liquid metal alloyed with actinide or fissio...
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WO/2011/132138 |
This invention relates to the integration of ammonium carbonate leach processes with established acid and alkaline uranium leach processes as multifunctional industrial processes for the extraction, high degree purification and conversio...
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WO/2011/116426 |
A process for leaching uranium from a refractory uraniferous mineral including the step of treating a slurry containing said uraniferous mineral and ferrous ions in a reactor with an acid and an oxidant to increase the ORP in the reactor...
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WO/2011/098979 |
The invention relates to novel algae of the Coccomyxa genus, in particular the algae of a novel species called Coccomyxa actinabiotis, and to the use thereof for metal uptake from aqueous media, and in particular from radioactive media.
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WO/2011/098979 |
The invention relates to novel algae of the Coccomyxa genus, in particular the algae of a novel species called Coccomyxa actinabiotis, and to the use thereof for metal uptake from aqueous media, and in particular from radioactive media.
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WO/2011/095679 |
The invention relates to a method for the selective recovery of uranium from a sulphate-based acidic aqueous solution of uranium containing iron and other metals by means of solvent extraction, in which the extractant used in the organic...
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WO/2011/082454 |
The present invention provides a process for the production of a uranium trioxide yellowcake from a uranium peroxide precipitate, the peroxide precipitate being in the form of a low solids content, uranium rich feed slurry, the process i...
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WO/2011/076739 |
The invention relates to a method making it possible to purify the uranium from a natural uranium concentrate. Said method includes: a) extracting the uranium, present in the form of uranyl nitrate, in an aqueous phase A1 resulting from ...
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WO/2011/067271 |
The invention relates to a method for chemically decontaminating the surface of a metal component of the primary circuit of a pressurized-water reactor, said surface comprising an oxide layer. The method is divided into two process stage...
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WO/2011/012579 |
The invention relates to the use of a diglycolamide to increase the separation factor between americium and curium and/or between lanthanides during an extraction operation including contacting an acidic aqueous phase, which contains ame...
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WO/2011/012563 |
The invention relates to a method for selectively recovering americium from an aqueous nitric phase containing americium, curium, and fission products including lanthanides and yttrium, but free of uranium, plutonium and neptunium, or wh...
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WO/2011/009814 |
The invention relates to novel compounds that can be used as actinide ligands, to the synthesis of said compounds and to the uses thereof. Said compounds have the following general formula (I): (formula I) in which R1 and R2, identical o...
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WO/2011/006974 |
The invention relates to a method for extracting at least one chemical element contained in a molten salt medium, comprising the following steps: a) a step consisting in bringing the molten salt medium containing the chemical element int...
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WO/2010/014562 |
A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosp...
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WO/2010/014562 |
A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosp...
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WO/2010/014745 |
Systems for treating material are provided that can include a vessel defining a volume, at least one conduit coupled to the vessel and in fluid communication with the vessel, material within the vessel, and N F3 material within the condu...
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WO/2010/014745 |
Systems for treating material are provided that can include a vessel defining a volume, at least one conduit coupled to the vessel and in fluid communication with the vessel, material within the vessel, and N F3 material within the condu...
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WO/2009/120373 |
A process and composition for extracting metal from a metal-laden ore, soil or rock is provided A liquid, three-component aqueous lixiviant comprises water, an alkali metal salt and a low pH acidic composition A four-component aqueous li...
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WO/2009/013759 |
A process for refining yellowcake to produce nuclear grade uranium using a single step precipitation route for the simultaneous removal of heavy metals, boron and other rare earth metals comprising dissolving the yellowcake in nitric aci...
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WO/2008/101296 |
A process for the drying of yellowcake, the yellowcake initially being in the form of a low solids content, uranium rich feed slurry, the process including the stages of : a. dewatering the feed slurry to produce a first dewatered solids...
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WO/2008/070195 |
A product includes actinium-225 (225Ac) and less than about 1 microgram (μg) of iron (Fe) per millicurie (mCi) of actinium-225. The product may have a radioisotopic purity of greater than about 99.99 atomic percent (at%) actinium-225 an...
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WO/2008/049807 |
The present invention relates to a method for separating together all the actinides (III), (IV), (V) and (VI) present in a highly acidic aqueous phase from the fission products, especially lanthanides, also present in said phase using a ...
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WO/2008/028664 |
The present application is directed to a method for the purification of Radium, in particular 226Ra1 for target preparation for an essentially pure 225Ac production from available radioactive sources, using an extraction chromatography i...
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WO/2008/003681 |
The invention relates to a method for very effectively separating a chemical element from uranium using an aqueous acid phase, in a uranium extraction cycle, when this chemical element is present in said phase with a concentration below ...
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WO/2007/123917 |
A system for combusting carbon-containing fuel includes a reactor 10 for simultaneously supporting oxidation of the fuel and conversion of CO2 within the reactor. A metal oxide or metal is input to the reactor to convert the CO2 to a min...
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WO/2007/096119 |
The present invention describes a method for purification of225Ac from irradiated 226Ra-targets provided on a support, comprising a leaching treatment of the 226Ra-targets for leaching essentially the entirety of 225Ac and 226Ra with nit...
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WO/2007/096119 |
The present invention describes a method for purification of225Ac from irradiated 226Ra-targets provided on a support, comprising a leaching treatment of the 226Ra-targets for leaching essentially the entirety of 225Ac and 226Ra with nit...
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WO/2007/085659 |
The invention relates to a method of separating, in an aqueous medium, at least one actinide element from one or more lanthanide elements, and employing at least one molecule which complexes the said actinide element to be separated, and...
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WO/2007/084116 |
Embodiments of a method and a system for recovering a metal, such as uranium, from a metal-containing material are disclosed. The metal-containing material is exposed to an extractant containing a liquid or supercritical-fluid solvent an...
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WO/2006/136948 |
The invention relates to a process for the chemical benef iciation of raw material containing tantalum-niobium such as wastes, scoria, concentrates and ores. The process comprises the step of decomposing the raw material with a carbonate...
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WO/2006/136948 |
The invention relates to a process for the chemical benef iciation of raw material containing tantalum-niobium such as wastes, scoria, concentrates and ores. The process comprises the step of decomposing the raw material with a carbonate...
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WO/2006/123051 |
The invention relates to novel p-tert-butylcalix[6]arenes of formulae (IA) and (IB) with carboxylic or hydroxyamino triacidic functions in positions 2,4 and 6, and other functions in positions 1, 3 and 5, supported liquid membranes and s...
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WO/2006/016892 |
A mixed extractant solvent including calix[4]arene-bis-(tert-octylbenzo)-crown-6 (“BOBCalixC6”), 4',4',(5')-di-(t-butyldicyclo-hexano)-18-crown-6 ('DtBul8C6'), and at least one modifier dissolved in a diluent. The mixed extractant so...
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WO/2006/008378 |
The invention relates to a method for processing an aqueous medium (m) containing at least one type of metal nitrate or sulphate and making it possible to convert said soluble nitrate or sulphate into an insoluble oxide and a nitric or s...
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WO/2005/108303 |
The invention relates to a method for eliminating uranium(VI) species from waters by means of slightly basic polyacryl-based anion exchangers, said uranium(VI) species being provided in the form of uranyl complexes as dissolved uranyl.
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WO/2005/021810 |
The invention relates to a method for separating trivalent americium from trivalent curium. According to the inventive method, an aqueous solution containing at least said cations is contacted, at an acid concentration of 0.01 mol/L to 1...
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WO/2005/018771 |
The present invention provides methods for separating isotopes of actinide elements such as uranium using microorganisms, e.g., metal or sulfate reducing bacteria. The microorganisms reduce the actinide element to form a precipitate, whi...
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WO/2004/087971 |
A two-cycle countercurrent extraction process for recovery of highly pure uranium from fertilizer grade weak phosphoric acid. The proposed process uses selective extraction using di-(2-ethyl hexyl) phosphoric acid (D2EHPA) and tri-n-buty...
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WO/2004/076509 |
The invention relates to novel phosphorous dendrimers comprising a core, at least one generation and an outer layer consisting wholly or partly of identical or different motifs, said motifs having formula (I), wherein: R1 and R2, which c...
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WO/2004/029279 |
The invention includes a method of separating isotopes from a mixture containing at least two isotopes in a solution. A first isotope is precipitated and is collected from the solution. A daughter isotope is generated and collected from ...
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WO/2003/102250 |
A method of treating ore particles to facilitate subsequent processing of the ore particles to recover valuable components from the ore is disclosed. The method includes exposing the ore particles to microwave energy and causing structur...
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WO/2003/095687 |
A process for treating a slurry of a mineral ore is disclosed, which includes a step of contacting the slurry with oxygen or an oxygen containing gas, causing an insoluble first species in the slurry to be at least partially converted to...
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WO/2003/022798 |
The invention relates to a heat-sensitive compound which is soluble in water below a critical temperature, Tc, and insoluble in water above temperature Tc, said property being thermoreversible. The inventive compound is characterised in ...
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WO/2002/052050 |
The inventive method consists in grinding and breaking down a loparite concentrate by nitric acid. A solution is separated by the filtration thereof on a ferrum-thorium cake and a pure nitrate solution of rare-earth elements which are pr...
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WO/2001/075138 |
The invention provides partially purified EPS that was purified from Thauera sp. Strain MZ1T. This partially purified EPS comprises rhamnose, xylose, galacturonic acid, galactose, glucose, N-acetylfucosamine. The invention further provid...
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WO/2001/062669 |
Novel stable forms of technetium and methods for their production are provided. These methods have particular application for the removal of technetium from industrial waste compositions.
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WO/2001/057285 |
Described is a process for the separation of americium metal from spent fuel or chlorinated high level waste of fuel reprocessing by using a liquid electrode whereby americium will be obtained in high yields.
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WO/2001/041151 |
The invention comprises a method for the dissolution of spent nuclear fuel pins or contaminated cladding, the method comprising contacting together the pins and both nitric and fluoroboric acids which, preferably, are present in admixtur...
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