Cross-linked gas selective membranes
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United States of America Patent
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Jun 12, 1990
Grant Date -
N/A
app pub date -
May 9, 1989
filing date -
May 9, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Membranes which are used for the separation of gases comprise cellulose acetate membranes which have been crosslinked with an organic titanate. The membranes are prepared by solvent exchanging a cellulose acetate membrane through a series of baths of decreasing polarity followed by treating the membrane with a crosslinking agent comprising an organic titanate in an organic solvent solution which possesses a relatively low polarity. The resulting membranes will retain the original excellent separation characteristics while concomitantly possessing greater temperature and pressure stability and flux characteristics.
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