Process for the reextraction in aqueous solution of the plutoniu

Details Process for the reextraction in aqueous solution of the plutoniu Process for the reextraction in aqueous solution of the plutoniu

1988-12-16

1991-01-08

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

423 9, 423 10, B01D 1104

Patent

active

049833006

ABSTRACT:
The invention relates to a process for the reextraction in aqueous solution of the plutonium present in an organic solvent, more particularly usable for uranium-plutonium separation.
According to this process the organic solvent is contacted with an acid aqueous solution of uranous salt, e.g. uranous nitrate, and hydroxylamine salt, e.g. hydroxylamine nitrate. Under these conditions, the uranous nitrate acts as a reducing agent for plutonium at valency (III and the hydroxylamine nitrate, which is also a plutonium reducing, agent, stabilizes Pu(III) and U(IV) in aqueous phase.
Performances comparable to those of the U(IV)-hydrazone nitrate system are obtained without forming prejudicial hydrazine nitrate decomposition products. (FIG. 2).

REFERENCES:
patent: 2865705 (1958-12-01), James et al.
patent: 3092446 (1963-04-01), Morgan et al.
patent: 3981961 (1976-09-01), Bathellier et al.
patent: 3987145 (1976-10-01), Bruns et al.
patent: 4229421 (1980-10-01), Chapman et al.
patent: 4764352 (1988-08-01), Bathellier et al.
Hydrometallurgy 4, 1-20 (1979) I. L. Jenkins, "Solvent Extraction Chemistry in the Atomic Energy Industry-A Review".

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