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Title:
METHOD FOR PRODUCING BISPHENOL−A
Document Type and Number:
WIPO Patent Application WO/2003/014049
Kind Code:
A1
Abstract:
A method for producing bisphenol−A through the continuous feed of phenol and acetone to a reaction unit having at least two reaction regions, wherein an acidic cation exchange resin in which 15 to 50 % of the acid points in the resin is neutralized with a sulfur−containing nitrogen compound is used as a catalyst, and an acetone having a methanol content of 3,000 ppm or less is dividedly fed to the at least two reaction regions. The method allows the elongation of the life of an acidic cation exchange resin used as a catalyst.

Inventors:
SARUWATARI TETSUYA (JP)
IWAHARA MASAHIRO (JP)
Application Number:
PCT/JP2002/007924
Publication Date:
February 20, 2003
Filing Date:
August 02, 2002
Export Citation:
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Assignee:
IDEMITSU PETROCHEMICAL CO (JP)
SARUWATARI TETSUYA (JP)
IWAHARA MASAHIRO (JP)
International Classes:
B01J31/10; C07B61/00; C07C37/20; B01J31/08; C07C39/16; (IPC1-7): C07C37/20; C07C39/16; B01J31/02
Foreign References:
US4308404A1981-12-29
JPH0840961A1996-02-13
JPH11246458A1999-09-14
JPH0692889A1994-04-05
Other References:
See also references of EP 1415967A4
Attorney, Agent or Firm:
Kataoka, Makoto c/o Idemitsu Kosan Co. LTD. (Intellectual Property Center 24-, Anesakikaigan Ichihara-shi Chiba, JP)
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