Selective alkylation process

Details Selective alkylation process Selective alkylation process

1990-02-20

1991-10-15

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

502152, C07C 4500

Patent

active

050576259

ABSTRACT:
Mono-ar-tert-butyl toluenediamine is selectively made by heating a mixture of toluenediamine and an aluminum halide of the formula R.sub.n AlX.sub.3-n or R.sub.3 Al.sub.2 X.sub.3 wherein n is 0, 1 or 2 and R is an alkyl containing 1-10 carbon atoms to 150.degree.-225.degree. C. and reacting the mixture with isobutylene at 500-300 psig until the yield of mono-ar-tert-butyl toluene is at or near maximum. Minor amounts of di-tert-butyl toluenediamines which form and are difficult to separate can then be lowered by venting the reaction and continuing to heat at about 130.degree.-200.degree. C. until the di-tert-butyl components are decreased to the desired level forming additional mono-ar-tert-butyl toluenediamine.

REFERENCES:
patent: 3123644 (1964-03-01), Olin
patent: 3759997 (1973-09-01), Napolitano
patent: 3923892 (1975-12-01), Klopfer

Affiliated with

Also associated with

Rating

Selective alkylation process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selective alkylation process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective alkylation process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-992324