Patent ID: 6753453
Filing Date: 2004-06-22
Classification: C07C

Abstract:
A process for the selective production of meta-diisopropylbenzene, said process comprising the steps of containing cumene under disproportionation conditions and in the absence of added benzene with a catalyst comprising a porous crystalline inorganic oxide material having an X-ray diffraction pattern including d-spacing maxima at 12.4Â±0.25, 6.9Â±0.15, 3.57Â±0.07 and 3.42Â±0.07 Angstrom, wherein said porous crystalline inorganic oxide material is selected from the group consisting of MCM-22, PSH-3, SSZ-25, MCM-36, MCM-56, ITQ-1, and ITQ-2 to produce a disproportionation effluent containing benzene and a mixture of diisopropylbenzene isomers, and then recovering from said disproportionation effluent a meta-diisopropylbenzene boiling range fraction in which the ratio of meta-diisopropylbenzene to ortho-diisopropylbenzene is in excess of 50 and the total amount of meta-diisopropylbenzene co-boilers excluding ortho-diisopropylbenzene is less than 1 wt % of said fraction.