Title:
PRODUCTION OF BISPHENOL COMPOUNDS
Document Type and Number:
Japanese Patent JP3172576
Kind Code:
B2
Abstract:
PURPOSE: To improve the yield, reaction rate, selectivity, etc., of the bisphenol compound by modifying an acidic cation exchange resin charged into a reactor and used for the reaction with a nitrogen-containing sulfur compound so as to give an uniform modification degree over the whole packed bed.
CONSTITUTION: A method for producing the bisphenol compound such as bisphenol A by charging raw materials containing a carbonyl compound such as acetone and a phenol compound into a reactor filled in with an acidic cation exchange resin and reacting the raw materials with each other comprises once intermitting the reaction, charging a solution into the reactor for modifying the acidic cation exchange resin with a nitrogen-containing sulfur compound, and then restarting the reaction. The solution is produced by dissolving the nitrogen-containing sulfur compound in the mixed solvent of the phenol and/or the carbonyl compound with an organic compound having a specific dielectric constant of 1.8-5.0. The method enables to readily improve the performance of the acidic cation exchange resin, to improve the yield, selectivity, etc., of the bisphenol compound, and further to reduce or eliminate a mercaptan to be added to the raw materials.
Inventors:
Masafumi Furumoto
Kazuyoshi Jimi
Kazuyoshi Jimi
Application Number:
JP12677592A
Publication Date:
June 04, 2001
Filing Date:
April 20, 1992
Export Citation:
Assignee:
Nippon Steel Chemical Co., Ltd.
International Classes:
B01J31/10; C07B61/00; C07C37/20; C07C37/88; C07C39/16; (IPC1-7): C07C39/16; B01J31/10; C07C37/20
Domestic Patent References:
| JP5732240A | ||||
| JP5735533A | ||||
| JP6470151A | ||||
| JP62148440A |
Attorney, Agent or Firm:
Katsuo Naruse (2 outside)