Process for inhibiting dihydric phenol degradation and color for

Details Process for inhibiting dihydric phenol degradation and color for Process for inhibiting dihydric phenol degradation and color for

1993-10-29

1995-01-17

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568701, 568724, 568763, C07C 3700, C07C 3768, C07C 3716

Patent

active

053827082

ABSTRACT:
A process for improving the color of bisphenol-A and improving yields of bisphenol-A comprises the addition of hypophosphorus acid either prior to or concurrent with a distillation step.

REFERENCES:
patent: 2999835 (1961-09-01), Goldberg
patent: 3028365 (1962-04-01), Schnell et al.
patent: 3334154 (1967-08-01), Kim
patent: 4131575 (1978-12-01), Adelmann et al.
patent: 4847433 (1989-07-01), Kissinger
patent: 4876391 (1989-10-01), Kissinger
patent: 4902836 (1990-02-01), Kissinger
patent: 5185475 (1993-02-01), Kissinger

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