Patent ID: 7129382
Filing Date: 2006-10-31
Classification: C07C,Y02P

Abstract:
1. A process for producing bisphenol A comprising condensing phenol and acetone in the presence of, as a catalyst, an acid type of ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin which has different modification rate is used in accordance with the concentration of methanol in acetone as a starting raw material and: (i) said condensing is performed in reaction equipment which comprises at least two reactors in series, (ii) said ion exchange resin has a modification rate in the range of 26 to 65 mol %, (iii) the methanol concentration in acetone is in the range of 700 to 8000 ppm by weight, and (iv) the water content of the starting raw material for condensing is maintained to be less than 0.4% by weight.