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| Number | Title | Issue Date |
| 4402924 | Preparation of high surface area metal fluorides and metal oxyfluorides, especially aluminum fluoride extrudates A method is described for the preparation of high surface area metal fluorides and metal oxyfluorides comprising reacting high surface area metal oxides with a fluorocarbon vapor wherein the fluorocarbon is selected from the group consisting of CH4-Q... | 09/06/1983 |
| 4334883 | Isotope separation by laser means A process for separating isotopes by selective excitation of isotopic species of a volatile compound by tuned laser light. A highly cooled gas of the volatile compound is produced in which the isotopic shift is sharpened and defined. Before substantial co... | 06/15/1982 |
| 4311678 | Method for removing uranium-containing deposits in uranium hexafluoride processing equipment This invention pertains to a method for removing deposits of uranium compounds in uranium hexafluoride handling equipment. A fluorocarbon containing bromine is internally injected into the handling equipment at or below ambient pressure and this brominati... | 01/19/1982 |
| 4275046 | Preparation of high surface area metal fluorides and metal oxyfluorides, especially aluminum fluoride extrudates A method is described for the preparation of high surface area metal fluorides and metal oxyfluorides comprising reacting high surface area metal oxides with a fluorocarbon vapor wherein the fluorocarbon is selected from the group consisting of CH4-Q... | 06/23/1981 |
| 4258048 | Substituted pyridine methyl esters of tetramethyl cyclopropane carboxylic acids and their use as insecticides Substituted pyridine methyl esters of tetramethylcyclopropane carboxylic acids and the optical isomers thereof are prepared which correspond to the formula: ##STR1## wherein n represents an integer of 0 to 2; X independently represents alkyl of ... | 03/24/1981 |
| 4255404 | Isotopic separation Method and apparatus for separating isotopes in an isotopic mixture of atoms or molecules by increasing the mass differential among isotopic species. The mixture containing a particular isotope is selectively irradiated so as to selectively excite the iso... | 03/10/1981 |
| 4207294 | Process for recovering uranium from wet-process phosphoric acid A process for recovering uranium from a wet-process phosphoric acid crude solution is provided in which the phosphoric acid crude solution is contacted with an organic extractant consisting of octylphenyl phosphoric acid, di(2-ethylhexyl)phosphoric acid a... | 06/10/1980 |
| 4202861 | Method for dry reprocessing of irradiated nuclear fuels Irradiated nuclear fuels consisting primarily of plutonium compounds and/or uranium compounds such as oxides, carbides, nitrides are converted in accordance with the method to plutonium hexafluoride and/or uranium hexafluoride. In a first step, the compou... | 05/13/1980 |
| 4119559 | UO2 F2 inclusion compositions Compositions of matter are described comprising the intercalation of Lewis bases into the layer lattice structure of UO2 F2 or by formation of directed chemical bonds between an electron donor atom of the Lewis base and the uranium i... | 10/10/1978 |
| 4117083 | Process for increasing the reaction rate of UO2 F2 A process for increasing the average reaction rate of reduction of UO2 F2. The UO2 F2 is treated with an organic compound which interacts with the UO2 F2. The combination is decomposed to y... | 09/26/1978 |
| 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 |
| 4096231 | Separation of uranium hexafluoride from plutonium hexafluoride by means of selective intercalation in graphite A method is disclosed for the selective separation and sequestering of plutonium from uranium which comprises contacting a gas stream containing uranium hexafluoride [at a partial pressure of 26 torr or less] and plutonium hexafluoride at any pressure wit... | 06/20/1978 |
| 4053559 | Production of uranium dioxide A continuous, four stage fluidized bed process for converting uranium hexafluoride (UF6) to ceramic-grade uranium dioxide (UO2) powder suitable for use in the manufacture of fuel pellets for nuclear reactors is disclosed. The process... | 10/11/1977 |
| 4034070 | Process for preparing anhydrous metal fluorides A process for preparing anhydrous metal fluorides is described wherein metal is reacted with HF and halogen in the presence of a nitrile.... | 07/05/1977 |
| 4024217 | Method of isotope separation by chemi-ionization A method for separating specific isotopes present in an isotopic mixture by aerodynamically accelerating a gaseous compound to form a jet of molecules, and passing the jet through a stream of electron donor atoms whereby an electron transfer takes place, ... | 05/17/1977 |
| 4020146 | Production of uranium dioxide A three stage fluidized bed process for converting uranium hexafluoride (UF6) to a ceramic-grade uranium dioxide (UO2) powder by first, reacting hydrogen and steam with UF6 in a first fluidized bed in a temperature range o... | 04/26/1977 |
| 3991155 | Isotopic enrichment of uranium hexafluoride in 235-uranium A compound of a chemical element to be isotopically enriched is placed in a working zone with an auxiliary material and temperature and pressure conditions are controlled to cause a liquid solution to occur. The liquid solution is injected through a nozzl... | 11/09/1976 |
| 3976750 | Process for the production of uranium trifluoride A novel method is disclosed for producing a pure uranium trifluoride efficiently. Said method is characterized by heating a mixture of uranium tetrafluoride and uranium nitride in an inert gas stream or under vacuum.... | 08/24/1976 |
| 3963828 | Manufacture of uranium dioxide powder Uranium dioxide powder is prepared by the AUC (ammonium uranyl carbonate) method. Supplementing the known process steps, the AUC, after separation from the mother liquor, is washed with an ammonium hydrogen cabonate or an NH4 OH solution and is... | 06/15/1976 |
| 3956147 | Production of metal fluorides from fluosilicic acid A process which comprises reacting at a temperature above 100°C. a metal oxide, hydroxide or a mixture thereof with aqueous fluosilicic acid, said fluosilicic acid having a concentration of about 10 to 45% by weight, to form gaseous silicon tetrafluoride... | 05/11/1976 |
| 3949050 | Method of absorbing UF6 from gaseous mixtures in alkamine absorbents A method of recovering uranium hexafluoride from gaseous mixtures employing as an absorbent a liquid composition at least one of the components of which is chosen from the group consisting of ethanolamine, diethanolamine, and 3-methyl-3-amino-propane-diol... | 04/06/1976 |
| 3941870 | Process for the production of uranium hexafluoride The production of UF6 in which UF4 is reacted with air or oxygen in the presence of a catalyst at 500° to 700°C. The solid byproduct of this reaction is reduced with hydrogen in the presence of a catalyst at 400° to 600°C. Fresh ... | 03/02/1976 |
