Patent ID: 6784324
Filing Date: 2004-08-31
Classification: B01J,C07C

Abstract:
A method of producing bisphenol A, in which bisphenol A is produced by condensation of phenol and acetone with the use of a cation exchange resin as a catalyst and a free mercaptan as a promoter, comprising feeding phenol and acetone to a multi-stage reactor in which at least two fixed bed-type adiabatic reactors packed with the cation exchange resin are arranged in series and a heat exchanger is provided at an inlet of each of the reactors, and condensing the phenol and acetone while the temperature within each of the reactors is controlled so as not to exceed 90Â° C., wherein the cationic exchange resin comprises at least one member selected from the group consisting of sulfonated styrene-divinylbenzene copolymer, sulfonated cross-linked styrene polymer, phenol formaldehyde-sulfonic acid resin and benzene formaldehyde-sulfonic resin.