Patent ID: 6271428
Filing Date: 2001-08-07
Classification: B01J,C07C,Y02P

Abstract:
A process for the purification of a diolefin hydrocarbon stream containing trace quantities of acetylene compounds which process comprises:(a) contacting said diolefin hydrocarbon stream containing trace quantities of acetylene compounds with a polymer solvent consisting essentially of an alkane compound having from about four to about eight carbon atoms and introducing the resulting admixture together with elemental hydrogen into a selective hydrogenation zone to selectively hydrogenate at least a portion of said acetylene compounds;(b) passing the resulting effluent from said selective hydrogenation zone in step (a) to a fractionation zone to produce a diolefin hydrocarbon stream having a reduced concentration of acetylene compounds and a stream containing polymer solvent and polymer compounds;(c) recycling at least a portion of said stream containing polymer solvent and polymer compounds to provide at least a portion of said polymer solvent in step (a);(d) recovering at least another portion of said stream containing polymer solvent and polymer compounds; and(e) recovering said diolefin hydrocarbon stream having a reduced concentration of acetylene compounds produced in step (b).