Method of extracting and separating spent solvent generated in n

Details Method of extracting and separating spent solvent generated in n Method of extracting and separating spent solvent generated in n

1991-07-12

1992-12-15

Spear, Frank

Liquid purification or separation

Processes

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

210907, B01D 1104

Patent

active

051714477

ABSTRACT:
A method of extracting and separating a spent solvent generated in a nuclear fuel cycle and containing a phosphate (TBP) and a higher hydrocarbon (n-dodecane). This method comprises bringing the spent solvent into contact with methanol, thereby causing the spent solvent to be separated into a phase mainly composed of the higher hydrocarbon and a methanol phase containing the phosphate. By drying the phase mainly composed of the higher hydrocarbon at a low temperature, a minor amount of methanol contained in the phase is separated through evaporation to recover the higher hydrocarbon. By drying the methanol phase at a low temperature, methanol is recovered through evaporation and the phosphate remains as a remaining solution. The remaining solution may further be subjected to low-temperature vacuum distillation to separate the solution into the phosphate (TBP) and a deterioration product thereof (DBP).

REFERENCES:
patent: 4595529 (1986-06-01), Neace

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