Process for preparing dinitrobenzophenones

Details Process for preparing dinitrobenzophenones Process for preparing dinitrobenzophenones

1982-07-01

1984-10-02

Trousof, Natalie

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

Organic compounds

Oxygen containing

528353, 564423, 585446, 585451, 585459, 585461, C07C 4500, C07C 49786

Patent

active

044749899

ABSTRACT:
A process for preparing dinitrobenzophenones which comprises reacting benzene with ethylene in the presence of an alkylation catalyst to obtain an alkylation product containing unreacted benzene, ethylbenzene, polyethylbenzenes, 1,1-diphenylethane and heavier products, separating benzene, ethylbenzene and polyethylbenzenes from said alkylation product, recovering from the remainder of said alkylation product a fraction whose boiling points fall within the temperature range of about 260.degree. to about 290.degree. C., reacting said fraction with nitric acid at a temperature within the range of about 130.degree. to about 210.degree. C., wherein the molar ratio of nitric acid to said fraction is in the range of about 3:1 to about 8:1, and thereafter reacting the total resulting reaction product with nitric acid in oleum to obtain a nitration product predominating in dinitrobenzophenones.

REFERENCES:
patent: 3280200 (1966-10-01), Greer
patent: 3452047 (1969-06-01), Frye
patent: 3542862 (1970-11-01), Chemerda et al.
patent: 3641132 (1972-02-01), Schulz et al.
patent: 3721713 (1973-03-01), Bloom

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