Recovery of olefins from gaseous mixtures

摘要

Process for recovering olefins from gas mixtures containing the paraffin having the same number of carbon atoms. A carbon membrane is provided in the form of hollow fibres and a membrane module is formed. The pores of the membrane are tailored to maximize the selectivity between the olefin (the permeating species) and the paraffin (the retained species). The membrane module is sealed into a pressure housing in such a way that the seal is stable to temperature changes and any individual defective CMSM hollow fibers can be plugged in situ. The gas mixture is fed to the membrane module, while heating the gas mixture and the membrane module and separately collecting the permeate and the retentate. The separation process is then completed by distillation.