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Title: Method for converting uranium oxides to uranium metal

Abstract

A process is described for converting scrap and waste uranium oxide to uranium metal. The uranium oxide is sequentially reduced with a suitable reducing agent to a mixture of uranium metal and oxide products. The uranium metal is then converted to uranium hydride and the uranium hydride-containing mixture is then cooled to a temperature less than -100.degree. C. in an inert liquid which renders the uranium hydride ferromagnetic. The uranium hydride is then magnetically separated from the cooled mixture. The separated uranium hydride is readily converted to uranium metal by heating in an inert atmosphere. This process is environmentally acceptable and eliminates the use of hydrogen fluoride as well as the explosive conditions encountered in the previously employed bomb-reduction processes utilized for converting uranium oxides to uranium metal.

Inventors:
 [1]
  1. (Norris, TN)
Publication Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
866463
Patent Number(s):
US 4717420
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; converting; uranium; oxides; metal; process; described; scrap; waste; oxide; sequentially; reduced; suitable; reducing; agent; mixture; products; converted; hydride; hydride-containing; cooled; temperature; -100; degree; inert; liquid; renders; ferromagnetic; magnetically; separated; readily; heating; atmosphere; environmentally; acceptable; eliminates; hydrogen; fluoride; explosive; conditions; encountered; previously; employed; bomb-reduction; processes; utilized; inert liquid; uranium oxide; inert atmosphere; reducing agent; uranium metal; reduction process; readily converted; uranium oxides; environmentally acceptable; converting uranium; hydrogen fluoride; sequentially reduce; oxide product; /75/

Citation Formats

Duerksen, Walter K. Method for converting uranium oxides to uranium metal. United States: N. p., 1988. Web.
Duerksen, Walter K. Method for converting uranium oxides to uranium metal. United States.
Duerksen, Walter K. Fri . "Method for converting uranium oxides to uranium metal". United States. doi:. https://www.osti.gov/servlets/purl/866463.
@article{osti_866463,
title = {Method for converting uranium oxides to uranium metal},
author = {Duerksen, Walter K.},
abstractNote = {A process is described for converting scrap and waste uranium oxide to uranium metal. The uranium oxide is sequentially reduced with a suitable reducing agent to a mixture of uranium metal and oxide products. The uranium metal is then converted to uranium hydride and the uranium hydride-containing mixture is then cooled to a temperature less than -100.degree. C. in an inert liquid which renders the uranium hydride ferromagnetic. The uranium hydride is then magnetically separated from the cooled mixture. The separated uranium hydride is readily converted to uranium metal by heating in an inert atmosphere. This process is environmentally acceptable and eliminates the use of hydrogen fluoride as well as the explosive conditions encountered in the previously employed bomb-reduction processes utilized for converting uranium oxides to uranium metal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}

Patent:

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  • A method for converting uranium oxide to uranium metal is described comprising the steps of heating uranium oxide in the presence of a reducing agent to a temperature sufficient to reduce the uranium oxide to uranium metal and form a heterogeneous mixture of a uranium metal product and oxide by-products, heating the mixture in a hydrogen atmosphere at a temperature sufficient to convert uranium metal in the mixture to uranium hydride, cooling the resulting uranium hydride-containing mixture to a temperature sufficient to produce a ferromagnetic transition in the uranium hydride, magnetically separating the cooled uranium hydride from the mixture, andmore » thereafter heating the separated uranium hydride in an inert atmosphere to a temperature sufficient to convert the uranium hydride to uranium metal.« less
  • A process is described for converting scrap and waste uranium oxide to uranium metal. The uranium oxide is sequentially reduced with a suitable reducing agent to a mixture of uranium metal and oxide products. The uranium metal is then converted to uranium hydride and the uranium hydride-containing mixtures is then cooled to a temperature less than -100/sup 0/C in an inert liquid which renders the uranium hydride ferromagnetic. The uranium hydride is then magnetically separated from the cooled mixture. The separated uranium hydride is readily converted to uranium metal by heating in an inert atmosphere. This process is environmentally acceptablemore » and eliminates the use of hydrogen fluoride as well as the explosive conditions encountered in the previously employed bomb-reduction processes utilized for converting uranium oxides to uranium metal.« less
  • A catalyst for catalytically reducing nitrogen oxides present in an exhaust gas in the presence of a reducing gas to convert the nitrogen oxides to harmless substances, which comprises a mixture consisting essentially of the oxides of V and Nb is disclosed.
  • A catalytic composite suitable for use in the continuous and simultaneous conversion of carbon monoxide, hydrocarbons, and nitrogen oxides contained in hot gases particularly from hot gases from an internal combustion engine is disclosed. The catalytic composite comprises uranium and a metal selected from the group consisting of platinum, palladium, rhodium, or mixtures thereof.