Process for preparing bisphenol-A

Details Process for preparing bisphenol-A Process for preparing bisphenol-A

1991-06-17

1992-09-08

Lone, Werren B.

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

Organic compounds

Oxygen containing

568722, 568728, C07C 3720, C07C 3914

Patent

active

051460076

ABSTRACT:
In the preparation of bisphenol-A by condensation of phenol with acetone in the presence of an acidic ion-exchange resin catalyst, pretreatment of the catalyst to render it anhydrous comprises two steps to minimize resin degradation. In the first step, from 25 to 90 percent by weight of the resin associated water is removed by vaporization, and in the second step dehydration is completed by saturating the partially dehydrated catalyst with phenol. The advantage of the improvement in the process resides in a more efficient drying, requiring less time and minimal degradation of the resin structure.

REFERENCES:
patent: 4191843 (1980-03-01), Kwantes et al.

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