Method for preparing and purifying 1,1,1-tris(4-hydroxyphenyl)et

Details Method for preparing and purifying 1,1,1-tris(4-hydroxyphenyl)et Method for preparing and purifying 1,1,1-tris(4-hydroxyphenyl)et

1996-12-04

1998-05-26

Geist, Gary

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

Organic compounds

Oxygen containing

C07C 3912

Patent

active

057568596

ABSTRACT:
1,1,1-Tris(4-hydroxyphenyl)ethane in admixture with bisphenol A is obtained by the reaction of 2,4-pentanedione with excess phenol under acidic conditions and in the presence of a mercapto compound as promoter. The products may be separated by extracting bisphenol A with a chlorinated alkane. Purification of the resulting 1,1,1-tris(4-hydroxyphenyl)ethane is achieved by slurrying in and/or recrystallization from methanol-water, optionally with addition of an alkali metal borohydride or dithionite.

REFERENCES:
patent: 5463140 (1995-10-01), Wehmeyer

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