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Phosphazene membranes for gas separations

United States Patent

July 11, 2006
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
Phosphazene Membranes for Gas Separations
A polyphosphazene having a glass transition temperature ("T.sub.g") of approximately C. or less. The polyphosphazene has at least one pendant group attached to a backbone of the polyphosphazene, wherein the pendant group has no halogen atoms. In addition, no aromatic groups are attached to an oxygen atom that is bound to a phosphorus atom of the backbone. The polyphosphazene may have a T.sub.g ranging from approximately C. to approximately C. The polyphosphazene may be selected from the group consisting of poly[bis-3-phenyl-1-propoxy)phosphazene], poly[bis-(2-phenyl-1-ethoxy)phosphazene], poly[bis-(dodecanoxypolyethoxy)-phosphazene], and poly[bis-(2-(2-(]- . The polyphosphazene may be used in a separation membrane to selectively separate individual gases from a gas mixture, such as to separate polar gases from nonpolar gases in the gas mixture.
Stewart; Frederick F. (Idaho Falls, ID), Harrup; Mason K. (Idaho Falls, ID), Orme; Christopher J. (Shelley, ID), Luther; Thomas A. (Idaho Falls, ID)
Battelle Energy Alliance, LLC (Idaho Falls, ID)
10/ 846,195
May 13, 2004
GOVERNMENT RIGHTS The United States Government has certain rights in this invention pursuant to Contract No. DE-AC07-99ID 13727, and Contract No. DE-AC07-05ID14517 between the United States Department of Energy and Battelle Energy Alliance, LLC.