Supported anisotropic reverse osmosis membranes based on synthet

Details Supported anisotropic reverse osmosis membranes based on synthet Supported anisotropic reverse osmosis membranes based on synthet

1978-10-16

1980-10-28

Granger, Theodore A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

210500M, C08J 316, C08J 518

Patent

active

042305837

ABSTRACT:
Supported anisotropic reverse osmosis membrane based on synthetic polyamides are prepared by first preparing a support therefor for treating a material suited for serving as a support for a polyamide membrane, with a heat resistant water soluble polymer which is insoluble in the polar solvents to be used for preparing the polyamide solution described below; preparing a solution of the polyamide in an organic polar solvent, in the presence of a saline compound; spreading the thus prepared polyamide solution onto the prepared support; partially evaporating the solvent by heating; coagulating the membrane in an aqueous medium; and optionally, thermally treating the membrane.

REFERENCES:
patent: 3526588 (1970-09-01), Michaels
patent: 3556305 (1971-01-01), Shorr
patent: 3567632 (1971-03-01), Richter et al.
patent: 3615024 (1971-10-01), Michaels
patent: 3822202 (1974-07-01), Hoehn
patent: 3884801 (1975-05-01), Kesting
patent: 3907675 (1975-09-01), Chapurlat
patent: 3925211 (1975-12-01), Schumann
patent: 3933653 (1976-01-01), Hashimo
patent: 3935172 (1976-01-01), Vogl
patent: 3969452 (1976-07-01), Oliberti et al.

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