Systems and methods for the separation of propylene and propane

摘要

A process for the membrane-based separation of propane and propylene, said process comprising the steps of feeding a feed stream (330) comprising propylene and propane to a first membrane (335), said first membrane comprising a feed port, a residue port, and a non-permeate port, at a temperature at or slightly above the dewpoint of propylene and a pressure between 2758 kPa and 4136 kPa, said first membrane (335) having a selectivity for propylene of at least 6.5, whereby at least a portion of a first non-permeate stream (340) condenses on or about said first membrane; and extracting a first permeate propylene enriched stream (390), wherein said permeate stream (390) is extracted at or the same temperature as said feed stream (330).