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US 6,271,428 B1Granted
Process for the purification of a diolefin hydrocarbon stream
AssigneeUop LLC
InventorPaul R. Cottrell
Life of this patent
Estimating the term…
Abstract
A process for the selective hydrogenation of trace quantities of acetylene compounds contained in a stream of diolefins to achieve extended on-stream performance by simultaneously contacting the selective catalyst with a diolefin feed, hydrogen and a polymer solvent.
Claims5
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).
3 more elements
A process for the purification of a butadiene hydrocarbon stream containing trace quantities of acetylene compounds which process comprises:
- (a) contacting said butadiene hydrocarbon stream containing trace quantities of acetylene compounds with a hexane solvent and introducing the resulting admixture together with elemental hydrogen into a selective hydrogenation zone containing a copper catalyst 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 butadiene hydrocarbon stream having a reduced concentration of acetylene compounds and a stream containing hexane solvent and polymer compounds;
- (c) recycling at least a portion of said stream containing hexane and polymer compounds to provide at least a portion of said hexane solvent in step (a);
- (d) recovering at least another portion of said stream containing hexane solvent and polymer compounds;
- and
- (e) recovering said butadiene hydrocarbon stream having a reduced concentration of acetylene compounds produced in step (b).
3 more elements
Dependencies are inferred from the claim text.