Alkylation catalyst and processes for preparing

摘要

A composition useful for catalyzing alkylation and transalkylation reactions comprises a molecular sieve having alkylation and/or transalkylation activity, an inorganic refractory oxide component and greater than about 250 ppmw ammonium ions, calculated as (NH4)2O on a volatiles-free basis. Such a catalyst has been found to be highly selective for the production of cumene in an intergrated process in which benzene is alkylated with propylene and transalkylated with diisopropylbenzene. The catalyst can also be used to selectively produce ethylbenzene via an intergrated process in which benzene is alkylated with ethylene and transalkylated with diethylbenzene.