Obtaining a conjugated diolefin from a mixture of c.sub.4 or...

Details Obtaining a conjugated diolefin from a mixture of c.sub.4 or... Obtaining a conjugated diolefin from a mixture of c.sub.4 or...

C - Chemistry, Metallurgy

07

C

202/76

C07C 7/08 (2006.01) B01D 3/40 (2006.01)

Patent

CA 1182774

Abstract of the Disclosure: A process for obtaining a conjugated diolefin from a mixture of C4 or C5 hydrocarbons which contains this diolefin, by single-stage or multi- stage extractive distillation using a selective solvent and recycling the latter to the extractive distillation, after it has been obtained from the stripping zone down- stream from each extractive distillation, a bleed stream of the recycled selective solvent being regenerated in a solvent purification stage in which the high-boiling or non-volatile impurities present in the solvent are separa- ted off, and the regenerated solvent obtained from the solvent purification stage also being recycled, which process comprises regenerating the solvent in a thin-film evaporation zone.

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