I was asked to design a benzene production plant via a thermal toluene hydrodealkylation process, and one of the parts was to separate the benzene and toluene via distillation. I am unsure why the thermal separation is taken at 3 bar pressure. The 3 bar was assumed from the Richard Turton book - Analysis, Synthesis, and Design of Chemical Processes, Fourth Edition by Richard Turton.
Sagarkumar Lathiya
Boiling point difference between benzene and toluene increase with pressure and hence relative volatility also increases, that could be the reason of separation at 3 bar.
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