Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1993-10-08
1995-05-30
Walsh, Donald P.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423 7, 423 20, 423253, 210638, B01D 1100, C01G 5600, C22B 6002
Patent
active
054198801
ABSTRACT:
A controlled multi-stage process for the stripping of uranium includes the introduction at one end of a solvent extraction device a uranium loaded organic solution. A concentrated stripping acidic aqueous solution is introduced at the other end of the solvent extraction device so that the aqueous solution and the organic solution are contacted counter-currently in the solvent extraction device at a temperature not substantially exceeding 35.degree. C. Each stage of the multi-stage process includes the steps of: (a) separating partly stripped organic solution from the stripping aqueous solution; (b) adding acid to the stripping aqueous solution until the acid concentration is substantially that of the acidic aqueous solution introduced at the one end of the extraction device; (c) processing the partly stripped organic solution and the stripping aqueous solution of step (b) in the next stage, the next stage of the organic solution being in an opposite direction in the extraction device of the next stage of the aqueous solution; (d) repeating steps (a)-(c) until substantially all the uranium in the organic solution has been removed; and (e) recovering the uranium from the resulting pregnant stripping aqueous solution.
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Swider Richard C.
Webster Steven A.
Chelliah Meena
Falconbridge Ltd.
Walsh Donald P.
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