Process for producing bisphenol a
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsMasahiro Iwahara, Tetsuya Saruwatari
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Abstract
There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.
Claims7
A process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of, as a catalyst, an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, characterized in that said ion exchange resin having a modification rate in the range of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and said ion exchange resin having a modification rate in the range of 20 to 65 mol % is used for a methanol concentration in acetone being in the range of 250 to 8000 ppm by weight.
Dependencies are inferred from the claim text.