Method of separating and purifying spent solvent generated in nu

Details Method of separating and purifying spent solvent generated in nu Method of separating and purifying spent solvent generated in nu

1994-07-26

1996-06-04

Mai, Ngoclan

Hazardous or toxic waste destruction or containment

Destruction or containment of radioactive waste

Treating radioactive liquid

210808, 203 48, G21F 900

Patent

active

055235158

ABSTRACT:
A method of separating and purifying a spent solvent generated in a nuclear fuel cycle and containing a higher hydrocarbon and a phosphate. This method comprises applying to the spent solvent a pressure high enough for allowing the crystallization of the higher hydrocarbon to thereby crystallize the higher hydrocarbon, and separating under pressure a resulting solid mainly composed of the higher hydrocarbon from a remaining solution containing the phosphate in a higher concentration. The remaining solution may further be subjected to low-temperature vacuum distillation to separate the solution into the phosphate and a deterioration product thereof contained in the solution.

REFERENCES:
patent: 4784766 (1988-11-01), Moritoki et al.
patent: 5019658 (1991-05-01), Cahn
patent: 5082635 (1992-01-01), Wakatsuki et al.
patent: 5110507 (1992-05-01), Ohtsuka et al.

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