Production of sized particles of uranium oxides and uranium oxyfluorides
Patent 3978194 Issued on August 31, 1976. Estimated Expiration Date: 
August 31, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 31, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3160471 3168369 3260575 3297411 3547598 3765844 InventorsAssigneeApplicationNo. 05/155079 filed on 06/21/1971US Classes:423/261, Dioxide252/636, Nuclear reactor fuel422/159, For radioactive reactant or product423/253, Uranium compound423/260Oxygen containingExaminersPrimary: Padgett, Benjamin R.Assistant: Miller, J. D. Attorney, Agent or FirmInternational ClassesC01B 13/20 (20060101)C01G 43/00 (20060101) C01G 43/01 (20060101) C01G 43/025 (20060101) AbstractA process for converting uranium hexafluoride (UF6) to uranium dioxide (UO2) of a relatively large particle size in a fluidized bed reactor by mixing uranium hexafluoride with a mixture of steam and hydrogen and by preliminary reacting in an ejector gaseous uranium hexafluoride with steam and hydrogen to form a mixture of uranium and oxide and uranium oxyfluoride seed particles of varying sizes, separating the larger particles from the smaller particles in a cyclone separator, recycling the smaller seed particles through the ejector to increase their size, and introducing the larger seed particles from the cyclone separator into a fluidized bed reactor where the seed particles serve as nuclei on which coarser particles of uranium dioxide are formed.Other References
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