Patent ID: 7868215
Filing Date: 2011-01-11
Classification: C07C,Y02P

Abstract:
1. A process for producing cumene which comprises the steps of: i) contacting benzene and propylene with a particulate molecular sieve alkylation catalyst having catalytic activity under at least partial liquid phase alkylating conditions to provide a product containing cumene and a polyisopropylbenzene fraction, said molecular sieve of said alkylation catalyst is selected from the group consisting of zeolite beta; ii) separating the polyisopropylbenzene fraction from the product; and iii) contacting the polyisopropylbenzene fraction and benzene with a particulate molecular sieve transalkylation catalyst under at least partial liquid phase transalkylating conditions to produce additional cumene; wherein said particulate molecular sieve transalkylation catalyst having a surface to volume ratio of about 80 to less than 200 inch