Patent ID: 6512151
Filing Date: 2003-01-28
Classification: B01J,C07C,Y02P

Abstract:
A process for the purification of a diolefin hydrocarbon feed stream containing trace quantities of acetylene compounds which process comprises:(a) contacting the diolefin hydrocarbon feed stream containing trace quantities of acetylene compounds and hydrogen with a selective hydrogenation catalyst in a selective hydrogenation zone to selectively hydrogenate at least a portion of the acetylene compounds; (b) contacting the resulting selective hydrogenation catalyst containing polymer compounds produced in step (a) with a polymer solvent comprising an alkane having from 4 to about 8 carbon atoms and hydrogen to produce a stream comprising polymer solvent and dissolved polymer compounds; (c) separating the stream comprising polymer solvent and dissolved polymer compounds to produce a stream comprising polymer solvent and having a reduced concentration of polymer compounds, and a stream rich in polymer compounds; (d) recycling at least a portion of the stream comprising polymer solvent and having a reduced concentration of polymer compounds to step (b) to supply at least a portion of the polymer solvent; (e) recovering the stream rich in polymer compounds produced in step (c); and (F) recovering a diolefin hydrocarbon stream having a reduced concentration of acetylene compounds produced in step (a).