Distillation process for purification of triaryl phosphate ester

Details Distillation process for purification of triaryl phosphate ester Distillation process for purification of triaryl phosphate ester

1974-06-20

1976-03-23

Sofer, Jack

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 88, 203 91, 260990, B01D 300, B01D 310

Patent

active

039458911

ABSTRACT:
Crude phosphate ester products resulting from the phosphorylation of phenol, lower alkyl phenols and mixtures of same are purified to prepare triaryl phosphates substantially free of unreacted phenols by the sequential steps of flash distillation and fractional distillation under controlled conditions with removal of the phosphate ester product as a liquid underflow.

REFERENCES:
patent: 2272193 (1942-02-01), Fisher et al.
patent: 2805240 (1957-09-01), Prahl
patent: 3219547 (1965-11-01), Wheeler

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