Patent ID: 6933419
Filing Date: 2005-08-23
Classification: C07C

Abstract:
1. A process for the selective production of meta-diisopropylbenzene and para-diisopropylbenzene, said process comprising the step of contacting a feed containing cumene under disproportionation conditions with a catalyst comprising a molecular sieve having pores with a minimum cross-sectional dimension of at least 6 Angstrom to produce a disproportionation effluent containing benzene and a mixture of diisopropylbenzene isomers, said mixture of diisopropylbenzene isomers having a ratio of meta to ortho-diisopropylbenzene greater than 100, wherein the feed is substantially free of benzene and is free of added sulfide; and wherein part of the diisopropylbenzene in the disproportionation effluent is recycled to the contacting step.