C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
23/399, 260/682.
C07C 15/46 (2006.01) B01J 19/24 (2006.01) C07C 5/333 (2006.01)
Patent
CA 1171881
Abstract of the Disclosure A method of dehydrogenating alkylaromatic compounds to produce vinylaromatic monomers wherein an alkylaromatic compound feed stream is preheated by passing it in indirect heat exchange relation with steam, the preheated feed stream is then flash vapor- ized by injecting superheated steam therein, the feed vapors are then passed in indirect heat exchange rela- tion with hot effluent vapors withdrawn from the dehy- drogenation reaction zone, after which the hot alkyl- aromatic compound vapors are introduced, together with superheated steam into a dehydrogenation reaction zone containing a bed of alkylaromatic compound dehy- drogenation catalyst and reacted to produce a vinyl- aromatic compound containing effluent stream which is withdrawn from the reaction zone, passed in heat exchange relation with the incoming alkylaromatic com- pound feed and condensed. The resulting condensate is separated into an aqueous phase and a crude vinyl- aromatic compound containing organic phase which can be purified by subsequent distillation; and apparatus for carrying out the described method.
410654
Cosden Technology Inc.
Gowling Lafleur Henderson Llp
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