Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hy

Details Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hy Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hy

1989-12-27

1991-02-05

Lone, Werren B.

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

Organic compounds

Oxygen containing

568722, 568727, C07C 3784

Patent

active

049906860

ABSTRACT:
Crude 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)propane (=tetramethyl-bisphenol A=TMBPA) can be purified by recrystallization, if C.sub.1 -C.sub.4 -monoalcohols with a water content of 2 to 40% by weight relative to the total weight of alcohol and water are used in an amount of 70 to 250% by weight, relative to the amount of TMBPA and the recrystallization is carried out at a temperature of 65.degree. to 150.degree. C.

REFERENCES:
patent: 4242527 (1980-12-01), Mark et al.
patent: 4320234 (1982-03-01), Mark et al.
patent: 4414422 (1983-11-01), Ash et al.

Affiliated with

Also associated with

Rating

Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-11429