Method of separating trivalent actinides and rare earth elements

Details Method of separating trivalent actinides and rare earth elements Method of separating trivalent actinides and rare earth elements

1996-08-12

1998-01-13

Mai, Ngoclan

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 10, 423 215, B01D 1104

Patent

active

057089582

ABSTRACT:
A method is provided for separating trivalent actinides and rare earth elements in the TRUEX method using a CMPO-TBP mixed solvent. The method of separating trivalent actinides and rare earth elements comprises a trivalent actinide/rare earth extraction step wherein trivalent actinides and rare earth elements are extracted by a solvent from highly acid waste generated by reprocessing of spent nuclear fuel, a nitric acid removal step wherein the nitric acid concentration of the solvent used to extract the trivalent actinides and rare earth elements is reduced, and a separation step wherein the trivalent actinides and rare earth elements contained in the solvent of low nitric acid concentration, are separated from each other.

REFERENCES:
patent: 3230036 (1966-01-01), Kappelmann et al.
patent: 3294494 (1966-12-01), Moore
patent: 4574072 (1986-03-01), Horwitz et al.
patent: 4938871 (1990-07-01), Musikas et al.
Kasting, G.B., et al., Separation of Trivalent Actinides From Lanthanides by Solvent Extraction, J. inorg, Nucl. Chem. vol. 41, pp. 745-747, 1979.

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