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Title:
PROCESS FOR PRODUCING BISPHENOL A
Document Type and Number:
WIPO Patent Application WO/2002/085830
Kind Code:
A1
Abstract:
A process for producing bisphenol A which comprises condensing phenol with acetone using as a catalyst an acid-form ion-exchange resin partially modified with a sulfurized amine compound, characterized in that when the acetone has a methanol concentration of 400 to 7,000 weight ppm, then the modified acid-form ion-exchange resin is one having a degree of modification of 15 to 50 mol% and a mercaptan compound (preferably ethyl mercaptan) is added. Due to the addition of the mercaptan compound, the catalytic activity can be inhibited from being reduced by the methanol contained as an impurity in the acetone. Thus, bisphenol A can be produced with a high conversion and high selectivity.

Inventors:
IWAHARA MASAHIRO (JP)
Application Number:
PCT/JP2002/003540
Publication Date:
October 31, 2002
Filing Date:
April 09, 2002
Export Citation:
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Assignee:
IDEMITSU PETROCHEMICAL CO (JP)
IWAHARA MASAHIRO (JP)
International Classes:
C07B61/00; C07C37/20; C07C39/16; (IPC1-7): C07C39/16; C07B61/00; C07C37/20
Domestic Patent References:
WO2000053315A12000-09-14
Foreign References:
JPH0692889A1994-04-05
JPH08325185A1996-12-10
JPH11246458A1999-09-14
JPH0625042A1994-02-01
Attorney, Agent or Firm:
Ohtani, Tamotsu (6F. 25-2 Toranomon 3-chome Minato-ku, Tokyo, JP)
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