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8153087 |
Method for the purification of radium from different sources
The present application is directed to a method for the purification of Radium, in particular 226Ra, for target preparation for an essentially pure 225Ac production from available radioactive...
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8137644 |
Method for the elimination of uranium (VI) species in the form of uranyl complexes from waters
The invention relates to a method for the removal of uranium(VI) species from waters by means of weakly basic, polyacrylic-based anion exchangers, said uranium(VI) species being present in the form...
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7988937 |
Decontamination of radioactive metals
The present invention relates to a method for the volumetric decontamination of radioactive metals. The method includes the step of precipitating out radioactive gamma and beta emitting nucleotides...
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7704468 |
Method for forming an extraction agent for the separation of actinides from lanthanides
An extraction agent for the separation of trivalent actinides from lanthanides in an acidic media and a method for forming same are described, and wherein the methodology produces a stable...
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7655199 |
Process for uranium recovery using anion exchange resin
The present invention relates to a process for the recovery of uranium in high silica environments comprising the use of a strong base macroreticular ion exchange resin.
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7214318 |
Method for separation of actinide elements
A method for separation of actinide elements comprising feeding a solution containing actinide elements such as americium, curium, californium and the like, into a resin column in which a weakly...
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7157061 |
Process for radioisotope recovery and system for implementing same
A method of recovering daughter isotopes from a radioisotope mixture. The method comprises providing a radioisotope mixture solution comprising at least one parent isotope. The at least one parent...
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7157022 |
Multivalent metal ion extraction using diglycolamide-coated particles
A separation medium, a method for using that separation medium and an apparatus for selectively extracting multivalent cations such as pseudo-lanthanide, prelanthanide, lanthanide, preactinide or...
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7148393 |
Ion-specific radiodecontamination method and treatment for radiation patients
A surface contaminated by a radioactive isotope is cleaned by applying to it a solution that contains an ion-specific resin that is weakly bonded to an ion and a weak anion solution including a...
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7087206 |
Multicolumn selectivity inversion generator for production of high purity actinium for use in therapeutic nuclear medicine
A multicolumn selectivity inversion generator separation method has been developed in which actinium ions, a desired daughter radionuclide, are selectively extracted from a solution of the thorium...
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6485695 |
Method and apparatus for preparing Bi-213 for human therapeutic use
This invention relates to a method and an apparatus for preparing Bi-213 to be integrated in a radioimmunocojugate for human therapeutic use. According to the invention the method comprises the...
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6153154 |
Method for sequential injection of liquid samples for radioisotope separations
The present invention is a method of separating a short-lived daughter isotope from a longer lived parent isotope, with recovery of the parent isotope for further use. Using a system with a...
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5966584 |
Method of separating trivalent actinides from trivalent lanthanides
Trivalent actinides can be separated from trivalent lanthanides in aqueous solutions at H+ concentrations of 2 mol/l to 0.001 mol/liter by extraction with bis(aryl)dithiophosphinic acid and a...
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5945342 |
Method for digesting spent ion exchange resins and recovering actinides therefrom using microwave radiation
The present invention relates to methods for digesting diphosphonic acid substituted cation exchange resins that have become loaded with actinides, rare earth metals, or heavy metals, in a way that...
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5476641 |
Method of separating and recovering plutonium and neptunium from plutonium- and neptunium-containing nitric acid solution
A method of separating and recovering Pu and Np from a Pu- and Np-containing nitric acid solution. The method comprises the steps of subjecting a nitric acid solution containing Pu and Np to...
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5437848 |
Recovery of metal values from process residues
A process for recovering metal and acid values from a source material containing metallic fluorides comprises digesting the source material in sulfuric acid to form a slurry, separating a fluoride...
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5419887 |
Separation of the isotopes of boron by chemical exchange reactions
The isotopes of boron, 10 B and 11 B, are separated by means of a gas-liquid chemical exchange reaction involving the isotopic equilibrium between gaseous BF3 and a liquid BF3 . donor molecular...
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5419880 |
Controlled acid-strong acid strip process
A controlled multi-stage process for the stripping of uranium includes the introduction at one end of a solvent extraction device a uranium loaded organic solution. A concentrated stripping acidic...
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5306399 |
Electrochemical exchange anions in decontamination solutions
Spent nuclear reactor coolant system decontamination solutions are first processed to remove the radioactive burden and to separate metallic impurities using cation exchange resins. The...
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5219540 |
Method of removing ruthenium contained in uranium-containing solutions
A method for removing ruthenium from a uranium-containing solution comprising adding a nitrite to the solution and passing the solution over a quaternary ammonium or tertiary amine resin to...
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5180526 |
Cleaning of solutions of alkylphosphates
A process for cleaning solutions of an alkylphosphate in a hydrophobic organic solvent. The process involves the steps of washing the solution with aqueous sulphuric acid, and contacting the washed...
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5158711 |
Insoluble tannin preparation process, waste treatment process employing insoluble tannin and adsorption process using tannin
There is disclosed an insoluble tannin preparation process, in which a tannin is first dissolved in an aldehyde aqueous solution. Then, ammonia is added to the solution to produce a precipitate,...
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5156824 |
Application of diphosphonic derivatives to cation exchange, new diphosphonic derivatives and production process therefor
New diphosphonic derivatives are capable of extracting the uranium in phosphoric acid with a P205 content ranging from 10 to 50 per unit.The new diphosphonic derivatives have the following formula:...
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5130001 |
Uranium isotope separation by continuous anion exchange chromatography
A simple, low temperature process for separating uranium isotopes and producing substantially pure uranium isotope fractions from a crude uranium isotope-containing aqueous feed stock is provided....
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4968504 |
Recovery of scandium and uranium
The separation of uranium, iron and scandium is achieved by the following process wherein a material containing these values is dissolved in mineral acid to form an aqueous solution, thereafter, an...
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4876036 |
Process for the extraction of cations and application thereof to the treatment of aqueous effluents
A process for the extraction of cations from an aqueous effluent. An effective quantity of at least one polymer or copolymer, which is physically or chemically crosslinked, is introduced into the...
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4832924 |
Process for producing uranium oxides
The present invention provides a process for producing a uranium oxide by dissolving a yellow cake in sulfuric acid or hydrochloric acid, bringing the obtained solution into contact with a...
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4808316 |
Process for treating waste water containing uranium and fluorine
A process for treating a waste water containing uranium and fluorine comprises a neutralizing precipitation step wherein slaked lime is added to the waste water containing uranium and fluorine and...
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4803057 |
Continuous chromatographic separation of uranium isotopes
A process for continuously separating uranium isotopes by an oxidation-reduction reaction using an anion exchanger comprising the steps of feeding an eluant containing a deactivated oxidizing agent...
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4797264 |
Recovery of metals adsorbed on chelating agents
Chelating agents on which metals such as uranium have been adsorbed are brought into contact with an eluent of aqueous solution containing reducing agents and basic compounds, until the metals are...
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4786481 |
Method for eluting a metal adsorbed on a chelating agent
A method for eluting a metal adsorbed on a chelating agent with an eluent, which comprises using as the eluent an aqueous solution containing a water-soluble inorganic sulfide and a basic compound...
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4769180 |
Process for separately recovering uranium and hydrofluoric acid from waste liquor containing uranium and fluorine
A process for separately recovering uranium and hydrofluoric acid from a waste liquor containing uranium and fluorine comprises a neutralizing precipitation step wherein a magnesium compound is...
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4765909 |
Ion exchange method for separation of scandium and thorium
A method for a quantitative separation of scandium from thorium comprises adsorption of both metals on a cation exchange resin followed by selective elution of scandium with an acidic solution of a...
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4748008 |
Process for separating uranium isotopes by oxidation-reduction chromatography
In a process for continuously separating uranium isotopes, 235 U and 238 U, by oxidation-reduction chromatography using a column of an anion exchanger, the separation of uranium isotopes and the...
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4740359 |
Process for the recovery of uranium values in an extractive reprocessing process for irradiated nuclear fuels
An organic extraction phase, containing fission materials uranium and plutonium, as well as a minor amount of fission- and corrosion-products, from an extraction step or from a purification step of...
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4720422 |
Material for collecting radionuclides and heavy metals
A material is, herein disclosed for collecting radionuclides and heavy metals that comprises an acrylic fiber element having MnO2 and/or ferrocyanide compound of the formula K2 MII [Fe(CN)6 ]...
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4696768 |
Process for the separation of large amounts of uranium from small amounts of radioactive fission products, which are present in basic, aqueous carbonate containing solutions
A process for separating large amounts of uranium from small amounts of radioactive fission products, which are present in basic, aqueous carbonate containing solutions, by means of a basic,...
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4683124 |
Actinide recovery process
Process for the removal of plutonium polymer and ionic actinides from aqueous solutions by absorption onto a solid extractant loaded on a solid inert support such as polystyrenedivinylbenzene. The...
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4663086 |
Process for bituminizing radioactive waste constituted by cation and/or anion exchange resins
The invention relates to a process for bituminizing radioactive waste constituted by cation and/or anion exchange resins.This process comprises a resin pretreatment stage performed so as to replace...
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4661327 |
Recovery of mineral values using magnetically susceptible ion exchange agent
A novel ion exchange agent comprises a magnetically susceptible core or nucleus surrounded by a coating of plastic or resin ion exchange material, preferably a microreticular coating immediately...
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4655936 |
Microbiological control in uranium processing
A method of improving the recovery of U3 O8 from circulating aqueous leach fluids used to extract uranium from its ores in underground uranium fields, which fields are made up of a series of...
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4622366 |
Uranium adsorbing material and process for preparing the same
A uranium adsorbing material made of a graft polymer with a graft ratio of 20 to 100% which contains amidoxime groups and cation exchange groups in a molar ratio of 1:1 to 20:1 and a process for...
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4619744 |
Recovery of heavy metals from aqueous solutions
Process for the recovery of heavy metals from aqueous solution by reaction with soluble, functionally-substituted polymer upon which the heavy metal loads, and optionally crosslinks by interaction...
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4606894 |
Uranium recovery from carbonate leach liquors using carboxylic acid cation exchange resin
A process and apparatus for recovering uranium from a carbonate solution containing uranium ions whereby the carbonate solution containing uranium ions is brought in contact with a cation exchanger...
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4606895 |
Ion exchange loading
The present invention relates to a method for increasing the amount of uranium values loaded on an ion-exchange resin by adding an oxidant, such as hydrogen peroxide, to a uranium containing...
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4601889 |
Process for the recovery of heavy metal
A process for the recovery of a heavy metal which comprises: bringing a polymer having pendant groups of the formula: --CO--NH--NH--CO--COOMin which M is hydrogen, sodium or potassium, into contact...
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4599221 |
Recovery of uranium from wet process phosphoric acid by liquid-solid ion exchange
Recovery of uranium from crude wet process phosphoric acid (WPA) by cation exchange using as cation exchanger a resin comprising active amino phosphonic or hydroxy phosphonic groups linked to a...
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4576969 |
Spherical ion exchange resin having matrix-bound metal hydroxide, method for producing the same and method for adsorption treatment using the same
A spherical ion exchange resin composed of a phenolic resin and a metal hydroxide is disclosed. The metal hydroxide is enclosed and bound with the phenolic resin. A method for producing such an ion...
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4575154 |
In situ leach method
A method for the in situ leaching of a subterranean mineral (e.g. uranium) deposit which permits the use of downflow ion exchange columns without requiring expensive filtration equipment to remove...
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4543169 |
Gold recovery process
A method is described for precious metal recovery from acidic precious metal-cyanide solutions by means of a weakly-basic anion-exchange material comprising a polymeric felt incorporating...
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