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Conversion of depleted uranium hexafluoride to a solid uranium compound

United States Patent

6,303,090
October 16, 2001
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
A process for converting UF.sub.6 to a solid uranium compound such as UO.sub.2 and CaF. The UF.sub.6 vapor form is contacted with an aqueous solution of NH.sub.4 OH at a pH greater than 7 to precipitate at least some solid uranium values as a solid leaving an aqueous solution containing NH.sub.4 OH and NH.sub.4 F and remaining uranium values. The solid uranium values are separated from the aqueous solution of NH.sub.4 OH and NH.sub.4 F and remaining uranium values which is then diluted with additional water precipitating more uranium values as a solid leaving trace quantities of uranium in a dilute aqueous solution. The dilute aqueous solution is contacted with an ion-exchange resin to remove substantially all the uranium values from the dilute aqueous solution. The dilute solution being contacted with Ca(OH).sub.2 to precipitate CaF.sub.2 leaving dilute NH.sub.4 OH.
Rothman; Alan B. (Willowbrook, IL), Graczyk; Donald G. (Lemont, IL), Essling; Alice M. (Elmhurst, IL), Horwitz; E. Philip (Naperville, IL)
The United States of America as represented by the United States Department of Energy (Washington, DC)
09/ 580,991
May 17, 2000
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. DE-AC02-98CH10913 between the U.S. Department of Energy (DOE) and The University of Chicago representing Argonne National Laboratory.