Regular copolyamides as desalination membranes

Details Regular copolyamides as desalination membranes Regular copolyamides as desalination membranes

1974-05-20

1976-01-27

Anderson, Harold D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210 65, 210500M, 260 18N, 260 308R, 260 78S, 428474, C08G 6926

Patent

active

039351726

ABSTRACT:
Regular copolyamides of the formula ##EQU1## WHERE X IS 2 TO 10, Y IS 0 TO 8, R is a divalent aliphatic or aromatic radical having 1 to 34 carbon atoms, and n is not less than 10, are prepared by reacting an aliphatic diester with an excess of an aliphatic diamine to form a diamine diamide, and reacting the diamine diamide intermediate with an aliphatic or aromatic diacid chloride.
Permselective membranes prepared from the copolyamides find particular utility in desalination of water by reverse osmosis.

REFERENCES:
patent: 2252554 (1941-08-01), Carothers
patent: 2336824 (1943-12-01), Wiley
patent: 2356702 (1944-08-01), Schlack
patent: 3516972 (1970-06-01), Wolfes et al.
patent: 3647761 (1972-03-01), Ridgway et al.

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