Verfahren zur Gewinnung von Styrol aus einem bei der katalytischen Dehydrierung von AEthylbenzol anfallenden Reaktionsgemischen

摘要

In the dehydrogenation of ethylbenzene to styrene, ethylbenzene is separated from the product stream also containing steam by passing said stream to a heat exchange zone, condensing the steam in said stream and generating steam in said heat exchange zone, compressing said generated steam so that the minimum condensation temperature of said steam is 210-240 DEG F., using the compressed generated steam to heat the reboiler of an ethylbenzene distillation column, and recovering ethylbenzene as a distillate. The compression is preferably effected by a steam turbine driven by high-pressure steam which is then superheated and mixed with feed ethylbenzene for the dehydrogenation.