Liquid purification or separation – Casing divided by membrane into sections having inlet – Energy recovery from treated liquid
Patent
1976-09-29
1979-06-26
Hart, Charles N.
Liquid purification or separation
Casing divided by membrane into sections having inlet
Energy recovery from treated liquid
210500M, 264 41, 521 63, B01D 1304, B01D 3100
Patent
active
041592514
ABSTRACT:
Membranes which are useful in ultrafiltration processes are prepared by casting films from solutions of heteroaromatic polymers and subsequently quenching these films into solvents which cause gelation of the polymers. Examples of polymers employed in the preparation of microporous membranes are: poly-as-triazines, polyquinoxalines, poly (pyrazinoquinoxalines), polyquinolines and poly (anthrazolines). Membrane properties such as solvent flux, specific water content and pore size are readily controlled by proper choice of polymer concentration, solvents, and the addition of nonsolvents, salts and/or surfactants to the casting solutions.
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patent: 3723306 (1973-03-01), Bridgeford
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Chemical Abstracts: 1974: 100063t, vol. 80, p. 271.
Scala et al., "Exploratory Research on Heteroaromatic Polymer Reverse Osmosis Membranes", U.S. Dept. of Interior, 10/7/72.
Millipore Catalog MF-67, Copyright 1966 by Millipore Corp., Bedford, Mass., pp. 2, 3, 8, 9, 10, 11 and 12.
Polymer Handbook, J. Brandrup et al., Publ. by John Wiley and Sons, New York, 1975, pp. 4-258.
Spiegelman Soloman
Wrasidlo Wolfgang J.
Hart Charles N.
Jacobson Harvey B.
O#Brien Clarence A.
Pharmaco, Inc.
Sadowski David R.
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