INTEGRATED POLYOLEFINS VENT RECOVERY

摘要

A process for integrating the recovery of hydrocarbons from a vent stream and the production of a nitrogen-rich liquid by: providing a vent to recovery including a monomer, wherein the vent to recovery originates from a polymerization process; separating the vent to recovery to form a primary recovered hydrocarbon and a primary recovered gas; separating the primary recovered gas to form a secondary recovered hydrocarbon and a warm residual gas, wherein the separation is by condensing the secondary recovered hydrocarbon, wherein an open-loop refrigeration cycle supplies cooling for the condensation, and wherein the open-loop refrigeration cycle produces a nitrogen- rich liquid; and recycling the primary recovered hydrocarbon to the polymerization process.