Method of making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcycloh

Details Method of making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcycloh Method of making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcycloh

1994-09-16

1996-02-20

Lone, Werren B.

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

Organic compounds

Oxygen containing

568718, C07C 3917, C07C 3700

Patent

active

054930600

ABSTRACT:
This invention provides a unique method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane ("BPTMC"). The disclosed method manufactures BPTMC from ketals and hemithioketals of 3,3,5-trimethylcyclohexanone ("TMC"). The reaction takes place in the presence of an acid catalyst, and optionally added co-catalysts. Additionally, applicants have disclosed a particularly useful method of manufacturing BPTMC from TMC and alcohol and/or thiol starting materials. These starting materials react to form the TMC ketal or thioketal materials. This method is particularly useful in that it allows recovery and recycling of the alcohol and/or thiol.

REFERENCES:
patent: 2602821 (1952-07-01), Luten, Jr. et al.
patent: 3437637 (1969-04-01), Matzner
patent: 3919330 (1975-11-01), Kwantes et al.
patent: 4201878 (1980-05-01), Mark et al.
patent: 4964890 (1990-10-01), Reuter et al.
patent: 4982014 (1991-01-01), Freitag et al.

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