Multilayer reverse osmosis membrane in which one layer is poly-m

Details Multilayer reverse osmosis membrane in which one layer is poly-m Multilayer reverse osmosis membrane in which one layer is poly-m

1987-10-08

1988-06-07

Fisher, Richard V.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050038, 210654, 528353, B01D 1300

Patent

active

047494883

ABSTRACT:
A multilayer membrane for performing reverse osmosis is disclosed. The membrane comprises a porous support and interfacially polymerized thereon a superposed layer of poly meta-phenylene tetrahydrofuran-2,3,4,5-tetracarboxamide in which up to 50 mole % of the tetrahydrofuran-2,3,4,5-tetracarboxamide units have been replaced with isophthalamide or terephthalamide units. The preferred material for forming the support is a polysulfone.

REFERENCES:
patent: 3567632 (1971-03-01), Richter et al.
patent: 3649687 (1972-03-01), Weyland et al.
patent: 3730941 (1973-05-01), Alvino
patent: 3744642 (1973-07-01), Scala et al.
patent: 4142020 (1979-02-01), Okamura et al.
patent: 4277344 (1981-07-01), Cadotte
patent: 4353802 (1982-10-01), Hara et al.
patent: 4643829 (1987-02-01), Sundet

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