NEW TWO-STAGE PROCESS CONVERTS BUTADIENE TO ETHYLBENZENE

In recent years, there has been a growing surplus of butadiene. DSM Research B.V. has developed to a semitechnical scale, a two-stage process to produce ethylbenzene from butadiene (Fig. 1). Process engineer Harrie A.M. Duisters and research chemist Johan G.D. Haenen recently described the process. The first step is the liquid-phase dimerization of butadiene to vinylcyclohexene. This step is carried out using an iron dinitrosyl-on-zinc catalyst. Butadiene conversion is more than 95% and

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