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| Number | Title | Issue Date |
| 7357910 | Method for producing metal oxide nanoparticles Method for producing metal oxide nanoparticles. The method includes generating an aerosol of solid metallic microparticles, generating plasma with a plasma hot zone at a temperature sufficiently high to vaporize the microparticles into metal vapor, and directing the... | 04/15/2008 |
| 7294291 | Ceramicrete stabilization of U-and Pu-bearing materials A method of stabilizing nuclear material is disclosed. Oxides or halides of actinides and/or transuranics (TRUs) and/or hydrocarbons and/or acids contaminated with actinides and/or TRUs are treated by adjusting the pH of the nuclear material to not less than about 5... | 11/13/2007 |
| 7291317 | Method for synthesizing extremely high-temperature melting materials The invention relates to a method of synthesizing high-temperature melting materials. More specifically the invention relates to a containerless method of synthesizing very high temperature melting materials such as carbides and transition-metal, lanthanide and acti... | 11/06/2007 |
| 7217402 | Apparatus and method for making metal chloride salt product A method of producing metal chlorides is disclosed in which chlorine gas is introduced into liquid Cd. CdCl2 salt is floating on the liquid Cd and as more liquid CdCl2 is formed it separates from the liquid Cd metal and dissolves in the salt. T... | 05/15/2007 |
| 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 basic primary, secondary or tertiary anion exchange resin obtained by r... | 05/08/2007 |
| 7195745 | Method of preparing a product based on phosphate of thorium and/or actinide(s) The invention relates to a process for the preparation of a product based on a phosphate of at least one element M(IV), for example of thorium and/or of actinide(IV)(s). This process comprises the following stages: a) mixing... | 03/27/2007 |
| 7011798 | Process for reprocessing spent nuclear fuels by utilizing phenomenon of cocrystallization A reprocessing process of spent nuclear fuels for roughly separating U and U—Pu from FP, TRU and the like in a nitric acid solution of spent nuclear fuels by utilizing phenomenon of cocrystallization of hexavalent U and Pu. For example, spent nuclear fuels are she... | 03/14/2006 |
| 6967011 | Method for synthesizing extremely high-temperature melting materials The invention relates to a method of synthesizing high-temperature melting materials. More specifically the invention relates to a containerless method of synthesizing very high temperature melting materials such as borides, carbides and transition-metal, lanthanide... | 11/22/2005 |
| 6833024 | Abatement of effluent from chemical vapor deposition processes using ligand exchange resistant metal-organic precursor solutions Apparatus and method for abatement of effluent from multi-component metal oxides deposited by CVD processes using metal source reagent liquid solutions which comprise at least one metal coordination complex including a metal to which is coordinatively bound at least... | 12/21/2004 |
| 6830738 | Low-temperature synthesis of actinide tetraborides by solid-state metathesis reactions The synthesis of actinide tetraborides including uranium tetraboride (UB4), plutonium tetraboride (PuB4) and thorium tetraboride (ThB4) by a solid-state metathesis reaction are demonstrated. The present method significantly lowers th... | 12/14/2004 |
| 6217841 | Process for the preparation of metal carbides having a large specific surface from activated carbon foams The invention relates to a silicon carbide or metal carbide foam to be used as a catalyst or catalyst support for the chemical or petrochemical industry or for silencers, as well as the process for producing the same. The foam is in the form of a three-dimensi... | 04/17/2001 |
| 6033636 | Method of recovering uranium and transuranic elements from spent nuclear fuel The steps for recovering uranium and transuranic elements are simplified, and the generation of waste solvent and waste materials is suppressed. Spent nuclear fuel is dissolved in nitric acid (S100) and the resulting solution is subjected to electrolytic ... | 03/07/2000 |
| 5640668 | Removal of dissolved actinides from alkaline solutions by the method of appearing reagents A method of reducing the concentration of neptunium and plutonium from alkaline radwastes containing plutonium and neptunium values along with other transuranic values produced during the course of plutonium production. The OH- concentration of... | 06/17/1997 |
| 5336450 | Process to remove rare earth from IFR electrolyte The invention is a process for the removal of rare earths from molten chloride electrolyte salts used in the reprocessing of integrated fast reactor fuel (IFR). The process can be used either continuously during normal operation of the electrorefiner or a... | 08/09/1994 |
| 5160367 | Salt transport extraction of transuranium elements from lwr fuel A process of separating transuranium actinide values from uranium values present in spent nuclear oxide fuels which contain rare earth and noble metal fission products. The oxide fuel is reduced with Ca metal in the presence of CaCl2 and a Cu--... | 11/03/1992 |
| 5147616 | Magnesium transport extraction of transuranium elements from LWR fuel A process of separating transuranium actinide values from uranium values present in spent nuclear oxide fuels which contain rare earth and noble metal fission products. The oxide fuel is reduced with Ca metal in the presence of CaCl2 and a U-Fe... | 09/15/1992 |
| 5141723 | Uranium chloride extraction of transuranium elements from LWR fuel A process of separating transuranium actinide values from uranium values present in spent nuclear oxide fuels containing rare earth and noble metal fission products as well as other fission products is disclosed. The oxide fuel is reduced with Ca metal in... | 08/25/1992 |
| 5128112 | Synthesis of actinide nitrides, phosphides, sulfides and oxides A process of preparing an actinide compound of the formula Anx Zy wherein An is an actinide metal atom selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, x is selected from the group consisti... | 07/07/1992 |
| 5098682 | Dehydration of plutonium or neptunium trichloride hydrate A process of preparing anhydrous actinide metal trichlorides of plutonium or neptunium by reacting an aqueous solution of an actinide metal trichloride selected from the group consisting of plutonium trichloride or neptunium trichloride with a reducing ag... | 03/24/1992 |
| 5096545 | Plutonium recovery from spent reactor fuel by uranium displacement A process for separating uranium values and transuranic values from fission products containing rare earth values when the values are contained together in a molten chloride salt electrolyte. A molten chloride salt electrolyte with a first ratio of pluton... | 03/17/1992 |
| 5073337 | Rare earth/iron fluoride and methods for making and using same A particulate mixture of Fe2 O3 and RE2 O3, where RE is a rare earth element, is reacted with an excess of HF acid to form an insoluble fluoride compound (salt) comprising REF3 and FeF3 pre... | 12/17/1991 |
| 4871478 | Method of improving the criticality safety in a liquid-liquid extraction process for spent nuclear fuel or breeder reactor materials A process for the extraction of uranium and plutonium from spent nuclear fuels or breeder reactor materials. The spent nuclear fuels or breeder reactor materials are dissolved in nitric acid to provide an aqueous acid solution containing uranium, plutoniu... | 10/03/1989 |
| 4814046 | Process to separate transuranic elements from nuclear waste A process for removing transuranic elements from a waste chloride electrolytic salt containing transuranic elements in addition to rare earth and other fission product elements so the salt waste may be disposed of more easily and the valuable transuranic ... | 03/21/1989 |
| 4724127 | Method for recovery of actinides from refractory oxides thereof using O.sub. F2 Method for recovery of actinides from nuclear waste material containing sintered and other oxides thereof using O2 F2 to generate the hexafluorides of the actinides present therein. The fluorinating agent, O2 F2... | 02/09/1988 |
| 4713225 | Method for removing organic reduced sulfur compounds A foraminous filter useful for removing particulates from a gas being flowed therethrough having impregnated therein a manganese dioxide absorbent active for removal of Total Reduced Sulfur compounds from the gas.... | 12/15/1987 |
| 4710222 | Method for removal of plutonium impurity from americium oxides and fluorides Method for removal of plutonium impurity from americium oxides and fluorides. AmF4 is not further oxidized to AmF6 by the application of O2 F at room temperature, while plutonium compounds present in the americium sample a... | 12/01/1987 |
| 4659551 | Process for separation of neptunium from an organic phase in the recovery of irradiated fuel and/or fertile materials A process for the separation of neptunium from an organic phase, which is developed in the recovery of irradiated nuclear fuel and/or fertile material. The organic phase contains uranium-, plutonium- and neptunium ions, tritium in the form of tritiated wa... | 04/21/1987 |
| 4656011 | Process of treating nuclear fuel In the process for treating irradiated nuclear fuel to effect separation of uranium plutonium other higher actinides, and fission products, in which nitric acid treatment, followed by solvent extraction, then backwashing the reduction of tetra- and hexa-v... | 04/07/1987 |
| 4544531 | Uranium hexafluoride purification process A process for the purification of uranium hexafluoride containing traces of neptunium fluoride and/or plutonium fluoride, wherein the uranium hexafluoride to be purified is contacted with a metal fluoride chosen from the group including lead fluoride PbF | 10/01/1985 |
| 4414187 | Preparation of metal phosphates by a reaction using boron phosphate Metallic phosphates are prepared by heating mixtures of BPO4 and a metallic oxide or salt.... | 11/08/1983 |
| 4318893 | Process for the separation of americium from curium contained in an aqueous nitric solution Process for the separation of americium from curium contained in an aqueous nitric solution, wherein the initial solution undergoes oxidation at ambient temperature in the presence of phosphoric acid or phosphate ions at a concentration at the most equal ... | 03/09/1982 |
| 4229421 | Purification of plutonium During the reprocessing of irradiated nuclear fuel by solvent extraction techniques a primary separation to give a uranium containing product stream and a plutonium containing product stream occurs. The plutonium in the plutonium containing stream is sepa... | 10/21/1980 |
| 4225455 | Process for decomposing nitrates in aqueous solution This invention is a process for decomposing ammonium nitrate and/or selected metal nitrates in an aqueous solution at an elevated temperature and pressure. Where the compound to be decomposed is a metal nitrate (e.g., a nuclear-fuel metal nitrate), a hydr... | 09/30/1980 |
| 4211757 | Actinide sulfite tetrahydrate and actinide oxysulfite tetrahydrate An actinide dioxide, e.g. uranium dioxide, plutonium dioxide, neptunium dioxide, etc., is prepared by reacting the actinide nitrate hexahydrate with sodium dithionite as a first step; the reaction product from this first step is a novel composition of mat... | 07/08/1980 |
| 4105746 | Method and apparatus for providing negative ions of actinide-metal hexafluorides This invention relates to a novel method and a novel generator, or source, for providing gaseous negative ions of selected metal hexafluorides. The method is summarized as follows: in an evacuated zone, reacting gaseous fluorine with an actinide-metal bod... | 08/08/1978 |
| 4082547 | Intermetallic compounds and metal purification By thoroughly mixing a compound of a base metal with a metal of the eighth subgroup of the Periodic Table, heating the resultant to a temperature in excess of 800° C at which it is subjected to a stream of hydrogen and treating thus-obtained intermetalli... | 04/04/1978 |
| 4012489 | Process for the preparation of uranium dioxide An actinide dioxide, e.g., uranium dioxide, plutonium dioxide, neptunium dioxide, etc., is prepared by reacting the actinide nitrate hexahydrate with sodium dithionite as a first step; the reaction product from this first step is a novel composition of ma... | 03/15/1977 |
| 3996331 | Plutonium and americium separation from salts Salts or materials containing plutonium and americium are dissolved in hydrochloric acid, heated, and contacted with an alkali metal carbonate solution to precipitate plutonium and americium carbonates which are thereafter readily separable from the solut... | 12/07/1976 |
| 3979500 | Preparation of finely-divided refractory powders of groups III-V metal borides, carbides, nitrides, silicides and sulfides The preparation of metal and metalloid carbides, borides, nitrides silicides and sulfides by reaction in the vapor phase of the corresponding vaporous metal halide, e.g., metal chloride, with a source of carbon, boron, nitrogen, silicon or sulfur respecti... | 09/07/1976 |
| 3976749 | Method for producing pure monocarbides, mononitrides and carbonitrides Pure monocarbides, or pure mononitrides or carbonitrides of metals are prepared by first forming a mixture of carbon with an oxalate of the metals and thermally decomposing the metal oxalate in the presence of the carbon by a stream of hydrogen. The hydro... | 08/24/1976 |
