Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1992-01-03
1992-08-04
Hunt, Brooks H.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
252626, 423251, 423 3, B01F 100
Patent
active
051357283
ABSTRACT:
A process for dissolving plutonium, and in particular, delta-phase plutonium. The process includes heating a mixture of nitric acid, hydroxylammonium nitrate (HAN) and potassium fluoride to a temperature between 40.degree. and 70.degree. C., then immersing the metal in the mixture. Preferably, the nitric acid has a concentration of not more than 2M, the HAN approximately 0.66M, and the potassium fluoride 0.1M. Additionally, a small amount of sulfamic acid, such as 0.1M can be added to assure stability of the HAN in the presence of nitric acid. The oxide layer that forms on plutonium metal may be removed with a non-oxidizing acid as a pre-treatment step.
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Cleveland, J. M. The Chemistry of Plutonium, 1970, pp. 570-575.
Constant Richard E.
Dixon Harold M.
Hunt Brooks H.
Mai Ngoclan T.
Moser William R.
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