High temperature gas separation membrane suitable for OBIGGS applications
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United States of America Patent
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Issued Date -
Jan 19, 2006
app pub date -
Jul 16, 2004
filing date -
Jul 16, 2004
priority date (Note) -
Abandoned
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Abstract
Gas separation membranes and methods for preparing such membranes. The gas separation membranes of the instant invention can separate oxygen and nitrogen in air to provide nitrogen enriched air (NEA), and are stable during exposure to temperatures of at least about 160.degree. C. The gas separation membranes of the instant invention may be formed from polyetherimide by extruding a hollow fiber using a core liquid, quenching the extruded fiber in dry air to promote loss of solvent and non-solvent, and drying the fiber. Methods for separating bleed air fed directly from an aircraft precooler to a high temperature gas separation hollow fiber membrane, to provide NEA, are also disclosed.
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