Dehydrogenation process for production of styrene from...

Details Dehydrogenation process for production of styrene from... Dehydrogenation process for production of styrene from...

C - Chemistry, Metallurgy

07

C

260/682.2

C07C 5/333 (2006.01) C07C 7/04 (2006.01) C07C 15/46 (2006.01)

Patent

CA 1273962

IMPROVED DEHYDROGENATION PROCESS FOR PRODUCTION OF STYRENE FROM ETHYLBENZENE COMPRISING LOW TEMPERATURE HEAT RECOVERY AND MODIFICATION OF THE ETHYL-BENZENE-STEAM FEED THEREWITH ABSTRACT OF THE DISCLOSURE An improved process for the production of styrene through dehydrogenation of ethylbenzene in the presence of steam at elevated temperatures, comprising (1) recovering heat of con- densation normally lost during separation of the various compo- nents of the dehydrogenation reaction effluent, especially of ethylbenzene from styrene, without need or use of a compressor and (2) using such heat to vaporize an aqueous feed mixture of ethylbenzene and dilution water that is introduced into the dehydrogenation reactor, preferably at about atmospheric pres- sure, thereby obviating the need to use steam to vaporize the liquid ethylbenzene feed and also enabling much of the diluent steam needed as sensible heat for the dehydrogenation reaction to be generated from water.

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