Patent ID: 6727394
Filing Date: 2004-04-27
Classification: C07C

Abstract:
A process for producing bisphenol A by continuously supplying phenol to a first-stage reactor in a continuous multi-stage fixed-bed reaction system composed of at least two reactors that are connected in series and are each filled in with a cation exchange resin as a catalyst and at the same time, continuously supplying acetone separately to each of the reactors, characterized by arranging a reactor which is filled in with a fresh or regenerated cation exchange resin on the final stage of the reaction system in replacing the most seriously deteriorated cation exchange resin in catalytic activity with the fresh or regenerated cation exchange resin, and operating the final stage reactor so that the ratio R of the feed rate of acetone to the consumption rate thereof falls within the range of more than one to less than 3.