Patent ID: 6479721
Filing Date: 2002-11-12
Classification: C07C

Abstract:
A process for producing a monoalkyl aromatic, said process comprising:a) passing an aromatic feed stream comprising a feed aromatic and an olefinic feed stream comprising an olefin to an alkylation catalyst bed in an alkylation reaction zone, wherein said alkylation catalyst bed contains a solid crystalline catalyst and wherein the ratio of the weight of said olefin entering said alkylation catalyst bed in said olefinic feed stream per unit time to the sum of the weights of compounds entering said alkylation catalyst bed per said unit time, multiplied by 100, is less than 1.88, wherein said solid crystalline catalyst comprises a zeolite selected from the group consisting of zeolite beta, ZSM-5, PSH-3, MCM-22, MCM-36, MCM-49, MCM-56, mordenite, and omega; b) alkylating said feed aromatic with said olefin in said alkylation catalyst bed at alkylation conditions and in the presence of said solid crystalline catalyst to form a monoalkyl aromatic, wherein said monoalkyl aromatic has one more alkyl group corresponding to said olefin than said feed aromatic; c) withdrawing an effluent stream comprising said monoalkyl aromatic and containing less than 1.0 wt-% diarylalkane relative to said monoalkyl aromatic from said alkylation reaction zone; and d) recovering said monoalkyl aromatic from said effluent stream.