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

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

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

     

Profile ID: LFUS-PAI-O-11429

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.