Production of uranium dioxide

Details Production of uranium dioxide Production of uranium dioxide

1973-07-05

1977-04-26

Padgett, Benjamin R.

Chemistry of inorganic compounds

Radioactive

Uranium compound

2523011R, 423 19, 423253, 423258, C01G 4302, G21C 300

Patent

active

040201465

ABSTRACT:
A three stage fluidized bed process for converting uranium hexafluoride (UF.sub.6) to a ceramic-grade uranium dioxide (UO.sub.2) powder by first, reacting hydrogen and steam with UF.sub.6 in a first fluidized bed in a temperature range of from about 475.degree. to 600.degree. C to form solid intermediate products UO.sub.2 F.sub.2 and U.sub.3 O.sub.8 ; second, reacting hydrogen and steam with the intermediate products in a second fluidized bed at a temperature ranging from about 575.degree. to about 675.degree. C to produce a second group of intermediate products including UO.sub.2 F.sub.2, U.sub.3 O.sub.8, and UO.sub.2 ; and, third, reacting hydrogen and steam with the second group of intermediate products in a third fluidized bed at a temperature of 575.degree. to 675.degree. C to produce ceramic grade UO.sub.2 powder having low residual content of fluorides and other foreign materials.

REFERENCES:
patent: 3160471 (1964-12-01), Knudsen
patent: 3235327 (1966-02-01), Blundell et al.
patent: 3547598 (1970-12-01), Knudsen
patent: 3765844 (1973-10-01), Rode

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