Method for preparing bisphenol a

Details Method for preparing bisphenol a Method for preparing bisphenol a

C - Chemistry, Metallurgy

07

C

260/617.7

C07C 37/20 (2006.01) C07C 39/16 (2006.01) C07C 219/06 (2006.01) C07C 311/09 (2006.01) C07C 317/18 (2006.01) C07C 323/12 (2006.01) C07C 323/25 (2006.01) D06M 13/217 (2006.01) D06M 13/252 (2006.01) D06M 13/268 (2006.01) D06M 13/372 (2006.01) D06M 13/438 (2006.01)

Patent

CA 2032950

ABSTRACT OF THE DISCLOSURE A method for preparing 2,2-bis(4-hydroxyphenyl)propane comprises reacting acetone and phenol in the presence of an acidic ion-exchange resin as a catalyst wherein the reaction of acetone and phenol is performed while removing a part of the water generated during the reaction from a mixed solution containing acetone and phenol by a pervaporation method. According to the method, the water generated through the reaction can rapidly be removed simultaneously with or alternatively to the reaction by a pervaporation operation and, therefore, the catalytic activity of the ion-exchange resin is not impaired at all. Moreover, any complicated operations associated with the dehydration are not required. Thus, the acidic ion-exchange resin catalyst can continuously be used over a long time period without any treatment for the regeneration thereof. Further, according to the method, bisphenol A can be economically prepared from acetone and phenol in a high conversion rate and high yield.

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