Process for the selective separation of actinides (III) and lant

Details Process for the selective separation of actinides (III) and lant Process for the selective separation of actinides (III) and lant

1997-05-15

1998-10-20

Mai, Ngoclan

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 9, 423 215, B01D 1104

Patent

active

058261613

ABSTRACT:
The present invention relates to a process for the selective separation of actinides (III) and lanthanides (III) from a reaction medium containing them. More specifically, the invention permits a selective extraction of actinides (III) by using an aqueous reaction medium containing TcO.sub.4.sup.- pertechnetate ions. The preferred extracting agents are chosen from among picolinamides and their derivatives. A particular use of the process is in the separation of actinides (III) from high activity raffinates produced during the reprocessing of nuclear fuels according to the solvent-based extraction process known as the PUREX process.

REFERENCES:
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patent: 4770807 (1988-09-01), Musikas et al.
patent: 4938871 (1990-07-01), Musikas et al.
patent: 5510090 (1996-04-01), Cuillerdier et al.

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