Separation of CO2/CH4 is one of the most important separations in oil and gas industries. Polyimide membranes are remarkable material for this purpose. Robson’s curve considers our claim about polyimide. One of the famous ...

In this research a novel copolyimide was synthesized with aliphatic diamine, which composed of 3,3ʹ4,4ʹ-Benzophenonetetracarboxylic dianhydride (BTDA), 4,4ʹ-Oxydianyline (ODA) and 4,9-dioxa-1,12-dodecacanediamine monomers. ...

The structural properties and gas permeation of a group of copolyimide membranes were investigated. The copolyimides used in this study were prepared using 3,30,4,40-benzophenonetetracarboxylic dianhydride (BTDA) and ...