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Title:
METHOD FOR PRODUCING BISPHENOL A
Document Type and Number:
WIPO Patent Application WO/2002/072516
Kind Code:
A1
Abstract:
A method for producing bisphenol A through condensing phenol and acetone using a sulfonic acid based ion exchange resin as a catalyst and a mercaptan as an auxiliary catalyst, characterized in that use is made of a sulfonic acid based ion exchange having a washability such that, when it is washed with ion-exchanged water in a volume 5 to 20 times its volume swollen with water and then is agitated in a phenol in a volume 1 to 3 times its volume swollen with water at a temperature of 50 to 80°C for 2 to 5 hr, the phenol after solid-liquid separation has a sulfur content of 1 ppm by weight or less. The method can be used for producing bisphenol A advantageously from an economical view point, since the above washing method is easy and simple to operate and a sulfonic acid based ion exchange resin which does not need a long time can be easily selected using the above washing method.

Inventors:
SARUWATARI TETSUYA (JP)
KAWANO NAOYA (JP)
Application Number:
PCT/JP2002/001924
Publication Date:
September 19, 2002
Filing Date:
March 01, 2002
Export Citation:
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Assignee:
IDEMITSU PETROCHEMICAL CO (JP)
SARUWATARI TETSUYA (JP)
KAWANO NAOYA (JP)
International Classes:
B01J31/10; B01J37/06; C07B61/00; C07C37/20; C07C39/16; (IPC1-7): C07C37/20; C07C39/16
Foreign References:
JP2000143565A2000-05-23
JPH09176069A1997-07-08
JPH0910598A1997-01-14
Attorney, Agent or Firm:
Ohtani, Tamotsu (Toranomon 3-chome Minato-ku, Tokyo, JP)
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