Preparation of substituted phenols

Details Preparation of substituted phenols Preparation of substituted phenols

1984-04-12

1985-08-27

Lone, Werren B.

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

Organic compounds

Oxygen containing

568740, 568772, C07C 3706

Patent

active

045380090

ABSTRACT:
Substituted phenols of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are each hydrogen or an aliphatic or aromatic hydrocarbon radical, are prepared by dehydrogenating a cyclic alcohol of the general formula II ##STR2## or a cyclic ketone of the general formula III ##STR3## where one of the broken lines can be an additional C-C bond, in the gas phase at from 150.degree. to 380.degree. C. over a supported noble metal catalyst, by a process in which the dehydrogenation catalyst used is palladium or platinum on an aluminum spinel carrier, in particular an aluminum spinel which has a BET specific surface area of from 5 to 150 m.sup.2 /g or, for the dehydrogenation of cyclohexenones, preferably from 10 to 50 m.sup.2 /g. Particularly suitable aluminum spinels are those which, in addition to aluminum, contain magnesium, zinc, cobalt or nickel.
In the novel process, substituted phenols are obtained in high yields and selectivities, and the catalyst has an extremely long life without a significant decrease in activity.

REFERENCES:
patent: 3534110 (1970-10-01), Juguin et al.
patent: 3801651 (1974-04-01), Adolphen et al.
patent: 4160113 (1979-07-01), Muller et al.
patent: 4161615 (1979-07-01), Muller

Affiliated with

Also associated with

Rating

Preparation of substituted phenols does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2002944