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Patent Searching and Data


Matches 101 - 150 out of 1,215

Document Document Title
WO/2007/084116A3
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...  
WO/2006/136948A2
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...  
WO/2006/136948A3
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...  
WO/2006/123051A3
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...  
WO2006007265A3
An apparatus and method to remove uranium from a body of material wherein the method includes the steps of depositing the body of solid material in an ultrasonic extractor and depositing an amount of acid in the ultrasonic extractor. The...  
WO2006016892A3
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 solven...  
WO/2006/016892A2
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...  
WO/2006/008378A1
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...  
WO/2005/108303A1
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.  
WO/2005/021810A1
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...  
WO/2005/018771A3
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...  
WO2004029279A3  
WO2004076509A3
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...  
WO/2004/087971A1
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...  
WO/2004/076509A2
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...  
WO/2004/029279A2
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 ...  
WO/2003/102250A1
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...  
WO/2003/095687A1
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...  
WO/2003/022798A1
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 ...  
WO/2002/052050A1
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...  
WO/2002/022895A1
A method for producing a metal or a metal compound, such as niobium or tantalum, from a raw material containing the metal through a process of treating with fluorine using a solution containing hydrofluoric acid, characterized in that an...  
WO2001075138A3
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...  
WO2001041151A3
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...  
WO/2001/075138A2
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...  
WO2000042229A3
The invention provides a series of techniques for processing uranium containing feed materials such as uranium ores, reprocessed uranium, uranium containing residues and uranium containing spent fuel. The processes described involve fluo...  
WO/2001/062669A1
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.  
WO/2001/057285A1
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.  
WO/2001/041151A2
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...  
WO/2001/016386A1
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 melter (14) along with a material (16) th...  
WO/2001/013379A1
A method for separating a metal from a composition including the metal involves forming an electrolytic cell in which the anode comprises a composition including the metal. The electrolyte is an ionic liquid. A sufficient potential diffe...  
WO/2000/042229A2
The invention provides a series of techniques for processing uranium containing feed materials such as uranium ores, reprocessed uranium, uranium containing residues and uranium containing spent fuel. The processes described involve fluo...  
WO/2000/034538A1
A process is provided for separating uranium ions from other metal ions by contacting an aqueous solution containing uranium and other metal ions with a polymeric material prepared using at least one monomer selected from diallylamine, $...  
WO/2000/031747A1
The invention concerns a method comprising a step which consists in passing the powder through a unit for reducing (24) the average size of the powder particles, bringing about a modification in the general appearance of the spectrum of ...  
WO/1999/066086A1
The invention concerns a method for dissolving plutonium or a plutonium alloy by contacting with an aqueous dissolving mixture, wherein said dissolving mixture comprises nitric acid, a carboxylic acid with complex-forming properties with...  
WO/1999/062824A1
There is described a method for treating or reprocessing spent nuclear fuel in which an organic phase is contacted with an aqueous nitric acid phase containing zirconium, technetium and at least one extractable actinide metal such that t...  
WO1999024396A8
The invention pertains to compounds for binding lanthanide ions and actinide ions. The invention further pertains to compounds for binding radionuclides, and to methods of making radionuclide complexes. Also, the invention pertains to me...  
WO/1999/028514A1
The invention provides a method for extracting one or more selected species from a sample, the selected species comprising one or more metallic elements, preferably of pentavalent or higher valency form such as Neptunium v, or one or mor...  
WO/1999/024396A1
The invention pertains to compounds for binding lanthanide ions and actinide ions. The invention further pertains to compounds for binding radionuclides, and to methods of making radionuclide complexes. Also, the invention pertains to me...  
WO/1999/023263A1
The present invention is directed to a process for removing various contaminants (e.g., organic collectors, contaminant metals or spectator ions, and/or suspended and colloidal solids) from process streams in leaching processes. The cont...  
WO/1999/015707A1
The invention provides incorporating techniques, detector techniques and extraction techniques. A method for producing a system adapted to interact with a dissolved species, the method comprising providing a first component incorporating...  
WO/1999/014386A1
The invention relates to a method for separating trivalent actinides from at least trivalent lanthanides, whereby said trivalent actinides are extracted from an aqueous solution containing a H?+¿ concentration of 0.01 to 2 mol/1 by usin...  
WO/1999/011575A1
The invention relates to a method for treating uranium compounds from mining water in uranium mines where the rock has been lixiviated with sulfuric acid during a groundwater sanitation process, while the mining waste can be recycled in ...  
WO/1999/010087A1
The invention concerns a method for separating actinides and lanthanides by membrane transport using a calixarene which consists in introducing in compartment (3) a first aqueous solution containing at least one metal to be separated fro...  
WO/1999/010545A1
The invention concerns a method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes. Said calixarenes correspond to formula (II) with R?1¿ and R?2¿ being alkyl or o-nitrophenoxyalkyl groups and R?3¿ ...  
WO/1999/005330A1
The invention concerns metallothermal process and continuous drawing of a metal product consisting of at least one metal, comprising: a step for melting the metal in a first cold crucible (1) heated by induction where the reduction of sa...  
WO/1998/055201A1
A process for preconcentrating and separating radium from a contaminated solution containing at least water and radium includes the steps of adding a quantity of a water-soluble macrocyclic polyether to the contaminated solution to form ...  
WO/1998/019779A1
A process for oxidation of ferrous ions in solution, and more particularly a process for improved base metal and/or uranium leaching from ores, concentrates or tailings using ferric ion as an oxidising agent. A reaction vessel (10) holds...  
WO/1998/018929A1
The invention relates to nucleic acids that encode a secondary transporter that transports citrate or the complex of citrate and metal ions or metal salt ions. These nucleic acids can be functionally expressed in host cells such as $i(E....  
WO/1998/008994A1
Apparatus for the solidification by desublimation of a sublimed gaseous substance and the subsequent trapping and liquidation of said desublimed substance is described, the apparatus comprising: means for the supply of a coolant fluid to...  
WO/1998/004754A1
A method of extracting metal and metalloid species from a solid or liquid substrate using a supercritical fluid solvent containing one or more chelating agents followed by back-extracting the metal and metalloid species from the metal an...  

Matches 101 - 150 out of 1,215