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Synthesis Of Uranium Fluorides From Uranium Dioxide With Ammonium Bifluoride And Ammonolysis Of Uranium Fluorides To Uranium Nitrides
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Book Synopsis Synthesis of Uranium Fluorides from Uranium Dioxide with Ammonium Bifluoride and Ammonolysis of Uranium Fluorides to Uranium Nitrides by : Charles Burnett Yeamans
Download or read book Synthesis of Uranium Fluorides from Uranium Dioxide with Ammonium Bifluoride and Ammonolysis of Uranium Fluorides to Uranium Nitrides written by Charles Burnett Yeamans and published by . This book was released on 2008 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Ammonium Bifluoride in the Preparation of Fluorides from Oxides by : John Reed Long
Download or read book The Use of Ammonium Bifluoride in the Preparation of Fluorides from Oxides written by John Reed Long and published by . This book was released on 1948 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dry Process Fluorination of Uranium Dioxide Using Ammonium Bifluoride by : Charles Burnett Yeamans
Download or read book Dry Process Fluorination of Uranium Dioxide Using Ammonium Bifluoride written by Charles Burnett Yeamans and published by . This book was released on 2003 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was conducted to determine the practicality of various unit operations for fluorination of uranium dioxide. The objective was to prepare ammonium uranium fluoride double salts from uranium dioxide and ammonium bifluoride, then decompose these salts to uranium tetrafluoride through heating to temperatures near 425 °C in either a fluidized bed or a stirred bed. Fluorination in the stirred bed was attempted without pretreatment of the reagents. For the fluidized bed experiments, reagents were ball-milled prior to being heated in the bed. Experiments were conducted in either argon or 4% hydrogen in argon. The ball mill appeared to be an effective technique for fluorinating uranium dioxide with ammonium bifluoride. Samples changed color from brown to bright green, and no oxides could be detected in the x-ray diffraction pattern of the product. It was found that stainless steel is a suitable material of construction for reaction vessels, whereas mild steel parts corroded quickly. Only a small degree of fluidization provided adequate mixing in fluidized beds, but a paddle mixing the stirred beds left an unmixed region around the bed perimeter. Results from the stirred beds showed the initial fluorination reaction completed only when the reagents were heated to 110 °C for at least three hours under argon. Decomposition took place under argon with a temperature ramp up to 425 °C. The product UF4 contained less than 1% oxide as an impurity, and the decomposition appeared to be complete. Fluidized beds were run with both argon and 4% hydrogen in argon as carrier gases. Experiments with 4% hydrogen in argon produced uranium tetrafluoride, with ammonium uranium pentafluoride and uranium dioxide as impurties. Experiments in argon produced uranium tetrafluoride, with uranyl difluoride, ammonium diuranyl pentafluoride and triuranium octoxide as impurities. Minimum temperatures and times needed to decompose the double salt in the fluidized beds were 200 minutes at 115 °C, a 500-minute ramp to 425 °C, and 200 minutes at 425 °C. The intermediate double salt produced at 110 °C appeared to be triammonium uranium septafluoride.
Book Synopsis Dry process fluorination of uranium dioxide using ammonium bifluoride : thesis by : Charles Burnett Yeamans
Download or read book Dry process fluorination of uranium dioxide using ammonium bifluoride : thesis written by Charles Burnett Yeamans and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Preparation of Uranium Hexafluoride from Uranium Ores and Concentrates by Fluoride Volatility Processes by : Earl W. Mautz
Download or read book The Preparation of Uranium Hexafluoride from Uranium Ores and Concentrates by Fluoride Volatility Processes written by Earl W. Mautz and published by . This book was released on 1958 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation of Yttrium Fluoride Using Ammonium Bifluoride by : John Walker
Download or read book Preparation of Yttrium Fluoride Using Ammonium Bifluoride written by John Walker and published by . This book was released on 1959 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation of Uranium Pentafluoride by : Homer F. Priest
Download or read book Preparation of Uranium Pentafluoride written by Homer F. Priest and published by . This book was released on 1946 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis French Process - Fundamental. The Precipitation of Ammonium Uranium Fluoride : Bench-scale Kinetic Tests by :
Download or read book French Process - Fundamental. The Precipitation of Ammonium Uranium Fluoride : Bench-scale Kinetic Tests written by and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical and infra-red spectrophotometric methods were used to analyse the off-gas from the reaction in which sulphur dioxide is bubbled into a heated solution containing ammonium fluoride and formic acid with or without the presence of uranyl ions. It was found that carbon dioxide is evolved for a relatively short period at a constant rate during the lengthy reaction between sulphur dioxide and formic acid. It is believed that the accompanying constant production of a reducing agent that is capable of reducing uranyl ions is responsible for the zero-order characteristics that have been found when precipitating ammonium uranous fluoride from such a system. From the qualitative observations made when studying off-gas evolution by infra-red spectrophotometric methods, several suggestions have been made that might make the process more attractive economically.
Book Synopsis Precipitation of Uranium Ammonium Fluoride from UNH Solutions as an Intermediate in the Preparation of Uranium Tetrafluoride by : W. B. Tolley
Download or read book Precipitation of Uranium Ammonium Fluoride from UNH Solutions as an Intermediate in the Preparation of Uranium Tetrafluoride written by W. B. Tolley and published by . This book was released on 1955 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Continuous Process for Converting Uranium Dioxide to Uranium Tetrafluoride Using Aqueous Hydrogen Fluoride by : S. D. Schiffman
Download or read book A Continuous Process for Converting Uranium Dioxide to Uranium Tetrafluoride Using Aqueous Hydrogen Fluoride written by S. D. Schiffman and published by . This book was released on 1953 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Processing of Uranium-magnesium Fluoride Slag by : U.S. Atomic Energy Commission
Download or read book Processing of Uranium-magnesium Fluoride Slag written by U.S. Atomic Energy Commission and published by . This book was released on 1956 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sodium Uranium (IV) Fluoride by : W. B. Tolley
Download or read book Sodium Uranium (IV) Fluoride written by W. B. Tolley and published by . This book was released on 1955 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Reaction of Uranium Tetrafluoride with Dry Oxygen by : S. S. Kirslis
Download or read book The Reaction of Uranium Tetrafluoride with Dry Oxygen written by S. S. Kirslis and published by . This book was released on 1950 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reaction of dry oxygen with dry uranium tetrafluoride has been studied over a range of elevated temperatures under various conditions of oxygen flow.
Book Synopsis UF5, a New Fluoride of Uranium by : Aristid V. Grosse
Download or read book UF5, a New Fluoride of Uranium written by Aristid V. Grosse and published by . This book was released on 1944 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Production of Yellow Cake and Uranium Fluorides by : International Atomic Energy Agency
Download or read book Production of Yellow Cake and Uranium Fluorides written by International Atomic Energy Agency and published by . This book was released on 1980 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Note on the Separation of Hydrogen Fluoride from Uranium Hexafluoride by : Aristid V. Grosse
Download or read book Note on the Separation of Hydrogen Fluoride from Uranium Hexafluoride written by Aristid V. Grosse and published by . This book was released on 1947 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Fluorination of Uranium from Dried Solids and Its Application to the Fluoride Volatility Process by : Carl E. Johnson
Download or read book The Fluorination of Uranium from Dried Solids and Its Application to the Fluoride Volatility Process written by Carl E. Johnson and published by . This book was released on 1960 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ADF fluoride volatility process employs the unit processes of dissolution, fluidized bed drying and fluorination to recover fissile material from reactor fuels. Variables that affect the removal from dried solids representative of those obtained from dissolver solutions of high zirconium alloy fuels were studied. Variables investigated were particle size, additives, temperature, time, hydrofluorination and pyrolysis. Application of the study of Dresden and APPR type fuels was also considered.
