METHOD FOR PURIFYING TRIARYLPHOSPHATES Russian patent published in 1994 - IPC

Abstract RU 2019545 C1

FIELD: chemistry of triarylphosphates. SUBSTANCE: the purification operation is effected by distillation of triarylphosphates in the presence of 1-3 wt % oxyethylidenediphosphonic acid based on acid raw material impurities at 200-300 C and 1-20 mm Hg. EFFECT: improved purification method. 1 tbl

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RU 2 019 545 C1

Authors

Вogach Е.V.

Вryzgalin А.А.

Еfanov V.А.

Оlenin V.I.

Rubezhanskij V.I.

Dates

1994-09-15—Published

1992-11-24—Filed