A process of preparing an alkylated benzene or mixture of alkylated benzenes involving contacting a benzene feedstock with a solid acid, such as an acidic clay or acid zeolite, in a pretreatment zone at a temperature greater than about 130° C. but less than about 300° C. to form a pretreated benzene feedstock, and thereafter contacting the pretreated benzene feedstock with (a) an alkylating agent in an alkylation zone or (b) a transalkylating agent in a transalkylation zone, in the presence of an alkylation/transalkylation catalyst so as to prepare the alkylated benzene or mixture of alkylated benzenes. The pretreatment step improves the lifetime of the alkylation/transalkylation catalyst. Preferred products are ethylbenzene and cumene.
申请公布号
EP0922020(B1)
申请公布日期
2002.05.08
申请号
EP19970938460
申请日期
1997.08.20
申请人
THE DOW CHEMICAL COMPANY
发明人
SAMSON, MOHAMMED, S., U.;MEIMA, GARMT, R.;VAN DER AALST, MATHEUS, J., M.;LEE, GUO-SHUH, JOHN;GARCES, JUAN, M.