Method for increasing the lifetime of an extraction medium used

Details Method for increasing the lifetime of an extraction medium used Method for increasing the lifetime of an extraction medium used

1975-10-20

1977-11-22

Schafer, Richard E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

210 21, 252364, 260429R, B01D 1104

Patent

active

040596710

ABSTRACT:
A method is provided for increasing the lifetime of an extraction medium containing an organophosphorus acid ester and a hydrocarbon and being used for reprocessing spent nuclear fuel and/or breeder materials. Impurities resulting from chemical and/or radiolytic decomposition and interfering compounds of such impurities with radionuclides are removed from the extraction medium by bringing the extraction medium, after use, into intimate contact with an aqueous hydrazine hydrate solution having a concentration of between about 0.1 molar and about 1.0 molar at a temperature between about 20.degree. C to about 75.degree. C. The aqueous hydrazine hydrate solution is then separated from the extraction medium.

REFERENCES:
patent: 3574532 (1971-04-01), Schulz et al.
patent: 3708508 (1973-01-01), Schulz
patent: 3949049 (1976-04-01), Ochsenfeld et al.

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