Patent ID: 9403740
Filing Date: 2016-08-02
CPC Classification: C07C

Claim Text:
1. A method for separation and recovery of an olefin from a mixture of a paraffin and an olefin, with an apparatus for separation and recovery of an olefin, containing a separation membrane containing a porous substrate and a zeolite layer that is formed on a surface and/or in a surface layer of the substrate, the zeolite layer being a hydrophilic zeolite layer that has an Si/Al ratio of 1.3≦Si/Al≦3.5 and a separation factor α, which is expressed by a value of a water/isopropanol weight ratio of a permeated component divided by that of a feed component in a pervaporation test at a temperature of from 40 to 75° C. of a water-IPA mixture containing from 15 to 30% by weight of water, of 10≦α≦4,000.