Alkylaromatic hydrocarbon dehydrogenation process

Details Alkylaromatic hydrocarbon dehydrogenation process Alkylaromatic hydrocarbon dehydrogenation process

C - Chemistry, Metallurgy

07

C

260/682.2

C07C 5/327 (2006.01)

Patent

CA 1078876

ABSTRACT OF THE DISCLOSURE Styrene is removed from a recycle water stream of an ethylbenzene dehydrogenation process by liquid-liquid extrac tion to prevent polymer buildup on heat exchange tubes and to lower coke formation in boiler tubes. The water stream is then fed into a heater to form steam for use within the reaction zone of the process. The solvent used for the extraction is benzene or a normal paraffin and preferably is the overhead product of a benzene-toluene column which separates the products of the process. The use of extraction lowers utility costs compared to stripping the recycle water stream.

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