Patent ID: 9492785
Filing Date: 2016-11-15
CPC Classification: B01D

Claim Text:
1. A polymeric membrane comprising a blend of at least a first polymer and a second polymer, wherein the first polymer is a polymer of intrinsic microporosity (PIM) and the second polymer is a polyetherimide (PEI) polymer, or a polyetherimide-siloxane (PEI-Si) polymer, and wherein the polymeric membrane has been ultraviolet (UV)-treated and thermally-treated, wherein the membrane is capable of separating a first gas from a second gas or is capable of separating a first gas from a mixture of gases, wherein the first gas is C 2 H 4 and the second gas is C 2 H 6 , or wherein the first gas is C 3 H 6 and the second gas is C 3 H 8 or wherein the first gas is C 2 H 4 and the mixture of gases includes C 2 H 4 and C 2 H 6 , or wherein the first gas is C 3 H 6 and the mixture of gases includes C 3 H 6 and C 3 H 8 and wherein the polymeric membrane has a selectivity that exceeds the Robeson's upper bound trade-off curve.