Ion exchangers modified with mercapto amines

Details Ion exchangers modified with mercapto amines Ion exchangers modified with mercapto amines

C - Chemistry, Metallurgy

07

C

402/3, 260/617.7

C07C 37/20 (2006.01) B01J 47/00 (2006.01) C07C 39/16 (2006.01) C08F 8/34 (2006.01) C08F 228/02 (2006.01)

Patent

CA 1318331

23189-6532 ABSTRACT This invention relates to a process for preparing an anhydrous ion exchanger modified with a mercapto amine, which process comprises drying an acid ion exchanger resin having a total capacity of acid functions of from 0.7 to 2.1 mval/ml of ion exchanger in the water-moist form with a water content of about 75 to 85% by weight or a total capacity of acid functions of from 3.5 to 5 mval or higher when based on 1 g of dry substance of ion exchanger, and thereafter rinsing with the phenol required for preparation of the bisphenol and thereafter neutralizing with at least 0.3 mol of a mercapto amine corresponding to formula (I) per mol of acid function of the ion exchanger at a temperature above the melting point of bisphenol. (I) Image in which formula (I), R1 stands for C1-C6-alkylene, C5-C10- cycloalkylene or C6-C14-arylene and R2 and R3 denote, independently of one another, C1-C6-alkyl or hydrogen, to a catalyst modified with mercapto amines and the use of the catalyst for the preparation of bisphenols.

539071

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