Process for cooling the stream leaving an ethylbenzene dehydrogenation reactor
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United States of America Patent
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May 28, 2013
Grant Date -
Mar 17, 2011
app pub date -
Nov 21, 2008
filing date -
Nov 29, 2007
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Abstract
The present invention is a process for the production of styrene monomer from ethylbenzene comprising the steps of:
- a) catalytically dehydrogenating said ethylbenzene in the presence of steam thereby catalytically producing a dehydrogenation effluent gas containing essentially unreacted ethylbenzene, styrene monomer, hydrogen, steam and divinylbenzene;b) quenching said effluent gas with an aqueous reflux in at least a quenching column to cool said effluent gas, and thereby obtaining a gas at the overhead and in the bottom a liquid stream warmer than the aqueous reflux;c) condensing said overhead gas thereby producing a liquid organic phase, an aqueous phase and a gaseous phase;d) using a portion or the whole of said aqueous phase of step c) as reflux for said step b) of quenching;e) sending to a decanter the liquid stream obtained at step b) to recover an aqueous phase and an organic phase.
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