Method for preparing 3-ethylbenzophenone

Details Method for preparing 3-ethylbenzophenone Method for preparing 3-ethylbenzophenone

1986-09-08

1988-03-15

Reamer, James H.

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

Organic compounds

Oxygen containing

568321, 585459, C07C 4536

Patent

active

047314834

ABSTRACT:
The present invention provides a method for preparing 3-ethylbenzophenone in a high purity which comprises the steps of alkylating benzene with ethylene with the aid of an alkylating catalyst to obtain an alkylated product composed mainly of unreacted benzene, ethylbenzene, polyethylbenzenes and heavier by-products; subjecting the alkylated product to distillation in order to recover therefrom a fraction which has a temperature range of boiling points within the range of 275.degree. to 310.degree. C. (in terms of atmospheric pressure); dehydrogenating the recovered fraction at a reaction temperature within the range of 200.degree. to 700.degree. C. in the presence of a dehydrogenating catalyst; oxidizing the dehydrogenated fraction in a liquid phase; and performing distillation to recover therefrom 3-ethylbenzophenone represented by the formula: ##STR1##

REFERENCES:
patent: 3899537 (1975-08-01), Holtz
patent: 3965185 (1976-06-01), Young
patent: 4299987 (1981-11-01), Dalhyj et al.

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