High purity benzene production using extractive distillation

Details High purity benzene production using extractive distillation High purity benzene production using extractive distillation

C - Chemistry, Metallurgy

07

C

C07C 7/08 (2006.01) B01D 3/40 (2006.01) C07C 5/41 (2006.01) C07C 7/00 (2006.01) C07C 15/04 (2006.01)

Patent

CA 2146759

A process is provided for separating benzene from non-aromatics in a highly aromatic stream containing olefins in a con- centration range of from about 0.05 to about 5.0, which process comprises predistilling said highly aromatic stream to produce a distilled fraction having a concentration of C8 and heavier compounds of less than about 0.1 wt. percent; and extracting said distilled fraction with a solvent comprising substituted morpholines in an extractive distillation zone to produce a highly- pure benzene stream.

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