申请人:CHEVRON RESEARCH COMPANY
公开号:EP0098677A2
公开(公告)日:1984-01-18
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° to about 290°C., reacting said fraction with nitric acid at a temperature within the range of about 130° to about 210°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 the total resulting reaction product with nitric acid in oleum to obtain a nitration product predominating in dinitrobenzophenones.
一种制备二硝基苯甲酮的工艺,包括在烷基化催化剂存在下使苯与乙烯反应,得到含有未反应的苯、乙苯、多乙苯、1,1-二苯基乙烷和更重产物的烷基化产物;从所述烷基化产物中分离出苯、乙苯和多乙苯;从所述烷基化产物的剩余物中回收沸点在约260°至约290°C温度范围内的馏分;在约130°至约210°C温度范围内使所述馏分与硝酸反应,其中硝酸与所述馏分的摩尔比在约3:1至约8:1范围内、在约 130° 至约 210°C 的温度范围内,使所述馏分与硝酸反应,其中硝酸与所述馏分的摩尔比在约 3:1 至约 8:1 的范围内,然后将反应生成的总产物与硝酸在发烟硫酸中反应,以获得以二硝基二苯甲酮为主的硝化产物。