Recovery of isoprene from a c.sub.5-hydrocarbon mixture

Details Recovery of isoprene from a c.sub.5-hydrocarbon mixture Recovery of isoprene from a c.sub.5-hydrocarbon mixture

C - Chemistry, Metallurgy

07

C

202/78

C07C 7/08 (2006.01) C07C 7/10 (2006.01)

Patent

CA 1218030

Abstract of the Disclosure: Isoprene is recovered from a C5-hydrocarbon mixture containing isoprene, penta-1,3- diene and cyclopentadiene by separating the said mixture by liquid-liquid extraction or extractive distillation with the aid of a selective solvent, in combination with a distillation upstream or downstream from the liquid- liquid extraction or extractive distillation, by a method in which a stream containing penta-1,3-diene and cyclo- pentadiene is separated off in the upstream or downstream distillation and is catalytically hydrogenated, and the hydrogenated stream is fed to the upper part of the liquid-liquid extraction or extractive distillation.

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