Poly(arylether-sulfone) semipermeable membrane comprising substi

Details Poly(arylether-sulfone) semipermeable membrane comprising substi Poly(arylether-sulfone) semipermeable membrane comprising substi

1975-07-07

1977-06-14

Lutter, Frank W.

Liquid purification or separation

Filter

Material

55 16, 55158, 204180P, 260 21R, 260 21E, 260 22R, 264 41, B01D 3900, B01D 3914

Patent

active

040295826

ABSTRACT:
A semipermeable polymeric membrane which essentially consists of modified poly (arylether-sulfone) having halomethyl groups and/or quaternized nitrogen atom-bearing groups. The membrane can be prepared by casting the polymer solution in a selected solvent or a mixture of suitable solvents on a surface, evaporating a portion of the solvent, and immersing the resulting film into a suitable non-solvent. The membrane is excellent in performance, such as water flux, and permeation selectivity, so that it can be used as a reverse osmosis membrane, an ultrafiltration membrane, and the like.

REFERENCES:
patent: 3481885 (1969-12-01), Radlmann
patent: 3528858 (1970-09-01), Hodgdon et al.
patent: 3556305 (1971-01-01), Shorr
patent: 3576912 (1971-04-01), Winkler
patent: 3592953 (1971-07-01), Ward et al.
patent: 3615024 (1971-10-01), Michaels
patent: 3709841 (1973-01-01), Quentin
patent: 3855122 (1974-12-01), Bourganel

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