Air dried cellulose acetate membranes

Details Air dried cellulose acetate membranes Air dried cellulose acetate membranes

1988-01-29

1989-08-08

Sever, Frank

Liquid purification or separation

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Material

264 49, 264342R, 264344, 264DIG48, 01D 1300, 01D 1304, B01D 1300, B01D 1304

Patent

active

048550485

ABSTRACT:
The method of preparing dried asymmetric cellulose acetate blend membranes through the use of at least one drying agent which is a hydrophobic organic compound, such as polysiloxanes, hydrocarbons, ethers, ketones, chlorohydrocarbons or nitrohydrocarbons. The membranes are dried from their aqueous state by direct evaporation of water. The resulting air dried membranes are suitable for the desalination of water by reverse osmosis, non-aqueous liquid separation, ultrafiltration, pervaporation, and for the separation of various gaseous mixtures into their constituent parts.

REFERENCES:
patent: 3133132 (1964-05-01), Loeb et al.
patent: 4147622 (1979-04-01), Nussbaumer
patent: 4527999 (1985-07-01), Lee
G. J. Van Amorongen, "The Permeability of Rubberlike Substances to Gases," Communication No. 46, Rubber Stitching Rev. gen caoutchovc 21, 50-6.
William J. Ward III and Charles K. Neulander, U.S. Clearinghouse Fed. Sci. Tech. Inform. PB Rep. 1970, No. 191769, 15 pp, (Eng.).
Jitendra P. Agrawal and Sourirajan Srinivasa, J. Appl. Polym. Sci. 1970, 14(5), 1303-21 (Eng.).
Schell, William F.; Lawrence, Ralph W. and King, William M., United States Research and Development Administration Contract No. E (149-18-2000).

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