Cross-linked polybenzimidazole membrane for gas separation

Details Cross-linked polybenzimidazole membrane for gas separation Cross-linked polybenzimidazole membrane for gas separation

2005-09-20

2005-09-20

Spitzer, Robert H. (Department: 1724)

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

C095S055000, C096S013000, C096S014000, C055S524000

Reexamination Certificate

active

06946015

ABSTRACT:
A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by layering a solution of polybenzimidazole (PBI) and α,α′dibromo-p-xylene onto a porous support and evaporating solvent. A supported membrane of cross-linked poly-2,2′-(m-phenylene)-5,5′-bibenzimidazole unexpectedly exhibits an enhanced gas permeability compared to the non-cross linked analog at temperatures over 265° C.

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