Separation of uranium hexafluoride from plutonium hexafluoride b

Details Separation of uranium hexafluoride from plutonium hexafluoride b Separation of uranium hexafluoride from plutonium hexafluoride b

1976-11-18

1978-06-20

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423251, 423258, C01G 4206, C01G 5600

Patent

active

040962318

ABSTRACT:
A method is disclosed for the selective separation and sequestering of plutonium from uranium which comprises contacting a gas stream containing uranium hexafluoride [at a partial pressure of 26 torr or less] and plutonium hexafluoride at any pressure with graphite whereby PuF.sub.6 is selectively intercalated into the graphite while UF.sub.6 is left unreacted in the gas stream. Preferably, the contacting of UF.sub.6 and PuF.sub.6 with graphite is conducted in the presence of excess fluorine.
In another embodiment the graphite is first reacted with a chemical oxidant. Such pretreatment of the graphite renders it inert to UF.sub.6 intercalation at partial pressures over 26 torr, the pressure above which UF.sub.6 normally intercalates with graphite. Such pretreatment will have less effect on PuF.sub.6 intercalation into the prereacted graphite compound and therefore will permit the separation of UF.sub.6 -PuF.sub.6 by differential intercalation into the prereacted graphite compound to be conducted at higher partial pressures of UF.sub.6.

REFERENCES:
patent: 3536532 (1970-10-01), Watanabe et al.
patent: 3708568 (1973-01-01), Golliher et al.
patent: 3925536 (1975-12-01), Schuman
Maire, Proc. Second U.N. Intern. Conf. Peaceful Uses Atomic Energy, 28, United Nations, (1958), Geneva, pp. 394-395.
Binenboym et al., J. Inorg. Nucl. Chem., 38, (12), 2313-2314.

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