Recovery of aromatics from styrene production off-gas

Details Recovery of aromatics from styrene production off-gas Recovery of aromatics from styrene production off-gas

C - Chemistry, Metallurgy

01

B

23/315, 260/716.

C01B 3/52 (2006.01) B01D 53/14 (2006.01) C07C 7/11 (2006.01) C07C 15/46 (2006.01)

Patent

CA 1151847

Abstract of the Disclosure An off-gas from a process for producing styrene from ethylbenzene, which contains non-condensables, in particular hydrogen, as well as some aromatics, in par- ticular ethylbenzene, is contacted with a higher boiling absorption oil to scrub aromatics from the off-gas and provide an off-gas essentially free of aromatics. The absorption step is employed as a final treatment of the off-gas; i.e., subsequent to initial treatment of the off-gas by chilling and/or ethylbenzene scrubbing to ini- tially reduce the aromatics content thereof. A preferred absorption oil is the heavy byproduct obtained from a process for producing ethylbenzene, containing polyethyl- benzenes.

362953

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