Recovery of anhydrous hydrogen fluoride from depleted uranium hexafluoride
Patent 5346684 Issued on September 13, 1994. Estimated Expiration Date: 
January 21, 2013. 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.
January 21, 2013. 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 3168369 3333930 3765844 3845193 3906081 Method of recovering HF from mixtures containing C1 -C3 halocarbon compounds Production of sized particles of uranium oxides and uranium oxyfluorides Production of uranium dioxide Production of uranium dioxide Conversion of uranium hexafluoride to oxides of uranium InventorAssigneeApplicationNo. 007016 filed on 01/21/1993US Classes:423/488, Recovery or purification423/472, Ternary compound423/483, Hydrogen fluoride423/484, From impure starting material423/489Binary fluorine containing compoundExaminersPrimary: Fuller, Benjamin R.Assistant: Lund, Valerie Attorney, Agent or FirmInternational ClassesC01B 007/19C01B 009/08 AbstractA method is provided for recovering an anhydrous hydrogen fluoride product from uranium hexafluoride gas by initially reacting the uranium hexafluoride in a primary reactor with steam to produce a uranyl fluoride intermediate and a gaseous mixture of hydrogen fluoride and water. The uranyl fluoride intermediate is fed to a secondary reactor and reacted with water to produce a triuranium octoxide product for disposal, and a gaseous mixture of water, hydrogen fluoride and oxygen. The two mixtures from the primary and secondary reactors are combined and subsequently separated in a distillation column to obtain an anhydrous hydrogen fluoride product stream and an aqueous azeotropic recycle stream containing water and hydrogen fluoride which is vaporized and returned to the primary reactor as the steam feed. |
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