WERKWIJZE VOOR HET BEREIDEN C.Q. VERVAARDIGEN VAN EEN KATALYSATOR VOOR DE BEREIDING VAN BISFENOLEN DOOR CONDENSATIE VAN FENOLEN EN KETONEN, ALSMEDE WERKWIJZE VOOR HET BEREIDEN VAN BISFENOLEN ONDER TOEPASSING VAN EEN ALDUS BEREIDE KATALYSATOR.

摘要

1361430 Bisphenols DOW CHEMICAL CO 14 Dec 1971 58051/71 Heading C2C [Also in Division C3] A bisphenol is obtained by the condensation of a phenol which is unsubstitutedin the p-position with a ketone in the presence of, as a catalyst, an acidic cation exchange resin which has been partially neutralized with a thiazolidine of the formula wherein each R is independently H, -CH 3 or -C 2 H 5 , R1 is H, alkyl, hydroxyalkyl, cyanoalkyl, aminoalkyl, cycloalkyl, phenylalkyl, phenyl or alkylphenyl of 1-10 carbon atoms, and each R11 is independently H, alkyl, cycloalkyl, phenylalkyl, phenyl or alkylphenyl of 1-10 carbon atoms or together form a C 4-6 alkylene group. In the Example (2), phenoland acetone are condensed to produce bisphenol A in the presence of a catalyst which is a sulphonic acid derivative of a styrene/divinyl benzene copolymer, partially neutralized with 2,2-dimethylthiazolidine.