Process for preparing bisphenol A

Details Process for preparing bisphenol A Process for preparing bisphenol A

1995-07-11

1997-05-20

Dean, Ralph H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

556428, 556429, 568727, C08G 7728

Patent

active

056313381

ABSTRACT:
The present invention provides a process for preparing bisphenol A with a high conversion and selectivity by reacting phenol with acetone in the presence of both a polyorganosiloxane having a mercapto group-containing hydrocarbon group and an acid. It is preferable that the polyorganosiloxane having a mercapto group-containing hydrocarbon group and the acid is a polyorganosiloxane having both a mercapto group-containing hydrocarbon group and a sulfonic acid group.

REFERENCES:
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patent: 4045379 (1977-08-01), Kwantes et al.
patent: 4191843 (1980-03-01), Kwantes et al.
patent: 4294995 (1981-10-01), Faler et al.
patent: 4859803 (1989-08-01), Shaw
patent: 5075511 (1991-12-01), Li
patent: 5463140 (1995-10-01), Wehmeyer et al.
Patent Abstracts of Japan, vol. 018, No. 236, (C-1196), May 6, 1994, JP-A-08 025420, Feb. 1994--Abstract .

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