Patent ID: 9150464
Filing Date: 2015-10-06
Classification: C07C

Abstract:
1. A method for treating a hydrocarbon stream comprising benzene, a nitrogen compound, an unsaturated aliphatic compound, and water, the method comprising: a) contacting the hydrocarbon stream with a water selective adsorbent comprising a zeolite selected from the group consisting of zeolite A, zeolite X, and zeolite Y to remove at least a portion of the water from the hydrocarbon stream to form a stream reduced with water; b) contacting the stream reduced with water from step (a) with a nitrogen selective adsorbent comprising a basic zeolite at contacting conditions to remove said nitrogen compound from the stream of step (a) to form a stream reduced with nitrogen compound; c) contacting the stream reduced with nitrogen compound of from step (b) with an unsaturated aliphatic compound removal material to remove an unsaturated aliphatic compound from the hydrocarbon stream to produce a treated hydrocarbon stream; d) contacting the treated hydrocarbon stream with an alkylation catalyst and ethylene under alkylation conditions to convert at least a portion of the benzene to ethylbenzene to form an ethylbenzene hydrocarbon stream; e) contacting the ethylbenzene hydrocarbon stream including ethylbenzene with a dehydrogenation catalyst under dehydrogenation conditions to convert at least a portion of the ethylbenzene to styrene to form a styrene stream; separating a benzene recycle stream from the styrene stream; and introducing the benzene recycle stream as at least a portion of the hydrocarbon stream for treating thereof according to steps a-c.