METHOD OF TREATING A GAS MIXTURE COMPRISING PROPANE AND PROPYLENE

摘要

The invention relates to a method of treating a gas mixture (1) comprising at least propylene and propane, such as to separate the propylene from the propane. The inventive method consists in bringing the aforementioned gas mixture into contact with a membrane which enables selective permeation of the propylene in relation to the propane, such as to produce a propylene-enriched permeate (3) and a propane-enriched retentate (2). The invention is characterised in that the propylene concentration of the permeate in the membrane is reduced using a flushing gas (4).