Method for preparing 3-ethylbenzophenone

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

1986-09-08

1988-03-29

Reamer, James H.

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

Organic compounds

Oxygen containing

568321, 585459, C07C 4528

Patent

active

047345284

ABSTRACT:
The present invention provides a method for preparing 3-ethylbenzophenone in a high purity which comprises the steps of alkylating benzene with ethylene in the presence of an alkylating catalyst to obtain an alkylated product composed mainly of unreacted benzene, ethylbenzene, polyethylbenzenes and heavier substances; subjecting the alkylated product to rectification 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); heating the recovered fraction together with a mixture of nitric acid and water; carrying out purification, if necessary; and performing distillation to recover therefrom 3-ethylbenzophenone represented by the formula (I): ##STR1##

REFERENCES:
patent: 3898288 (1975-08-01), d'Ostrowick et al.
patent: 4086277 (1978-08-01), Onopchenko et al.

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