Patents by Inventor Alan B. Rothman

Alan B. Rothman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Conversion of depleted uranium hexafluoride to a solid uranium compound
    Patent number: 6303090
    Abstract: A process for converting UF6 to a solid uranium compound such as UO2 and CaF. The UF6 vapor form is contacted with an aqueous solution of NH4OH at a pH greater than 7 to precipitate at least some solid uranium values as a solid leaving an aqueous solution containing NH4OH and NH4F and remaining uranium values. The solid uranium values are separated from the aqueous solution of NH4OH and NH4F 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)2 to precipitate CaF2 leaving dilute NH4OH.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: October 16, 2001
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Alan B. Rothman, Donald G. Graczyk, Alice M. Essling, E. Philip Horwitz