Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presenc

Details Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presenc Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presenc

1996-09-20

1998-08-04

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

528 30, C07C 3912

Patent

active

057896283

ABSTRACT:
A process for the production of 2,2'-bis(4-hydroxyphenyl)propanes by reacting the corresponding phenols and carbonyl compounds in the presence of organopolysiloxanes containing sulphonate and mercapto groups and acting as a catalyst, consisting of units of the formula
wherein R.sup.1 is a linear or branched alkylene group having 1 to 12 C atoms, a cycloalkylene group having 5 to 8 C atoms or a unit of the formulae ##STR1## and units of the formula

REFERENCES:
patent: 5075511 (1991-12-01), Li

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