PRODUCTION OF STYRENE

摘要

In a process for producing styrene, benzene is alkylated with ethylene to produce ethylbenzene and at least some of the ethylbenzene is dehydrogenated to produce styrene, together with benzene and toluene as by-products. At least part of the benzene by-product is passed through a bed of an adsorbent comprising at least one of an acidic clay, alumina, an acidic ion exchange resin and an acidic molecular sieve to remove basic nitrogenous impurities therefrom and produce a purified benzene by-product, which is then recycled to the alkylation step.

主权项

1. A process for producing styrene, the process comprising:
(a) alkylating benzene with ethylene to produce ethylbenzene; (b) dehydrogenating at least some of the ethylbenzene from (a) to produce styrene, together with benzene and toluene as by-products; (c) passing at least part of the benzene by-product from (b) through a bed of an adsorbent comprising at least one of an acidic clay, alumina, an acidic ion exchange resin and an acidic molecular sieve to remove basic nitrogenous impurities therefrom and produce a purified benzene by-product; and (d) recycling the purified benzene by-product to the alkylating (a).