Mixed matrix membranes incorporating microporous polymers as...

Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...

Reexamination Certificate

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C210S500270, C210S500360, C210S502100, C428S314800

Reexamination Certificate

active

07410525

ABSTRACT:
The present invention is for a polymer/polymer mixed matrix membrane and the use of such membranes in gas separation applications. More specifically, the invention involves the preparation of polymer/polymer mixed matrix membranes incorporating soluble polymers of intrinsic microporosity as microporous fillers. These polymeric fillers of intrinsic microporosity exhibit behavior analogous to that of conventional microporous materials including large and accessible surface areas, interconnected micropores of less than 2 nm in size, as well as high chemical and thermal stability, but, in addition, possess properties of conventional polymers including good solubility and easy processability. Gas separation experiments on these mixed matrix membranes show dramatically enhanced gas separation performance for CO2removal from natural gas. Mixed matrix membranes prepared in accordance with the present invention can also be used in the separation of the following pairs of gases: hydrogen/methane, carbon dioxide
itrogen, methane
itrogen and olefin/paraffin such as propylene/propane.

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