Alkyl substituted aromatic polyester gas separation membranes

摘要

Novel alkyl-substituted aromatic polyester gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyesters are formed from aromatic alcohols of the formula <IMAGE> where Z is independently alkyl groups having 1 to 10 carbon atoms, most preferably a tertiary butyl group, n is an integer from 0 to 4, preferably 1.