Permselective membrane

Details Permselective membrane Permselective membrane

1978-05-18

1981-05-05

Spear, Jr., Frank A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210491, 2105002, 264 455, B01D 1300

Patent

active

042657458

ABSTRACT:
A permselective membrane comprising a thin permselective film of a polymeric material, said polymeric material being prepared by cross-linking a polyaddition product between a polyepoxy compound and a polyamino compound having at least two amino groups capable of reacting with epoxy groups with a polyfunctional compound selected from the group consisting of aromatic, heterocyclic and alicyclic compounds containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate and acid anhydride groups; and a process for producing the same. The permselective membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.

REFERENCES:
patent: 3218273 (1965-11-01), Montesaho
patent: 3556305 (1971-01-01), Shorr
patent: 3567631 (1971-03-01), Lukach et al.
patent: 3947338 (1976-03-01), Jerabek et al.
patent: 3950247 (1976-04-01), Chiang et al.
patent: 3951815 (1976-04-01), Wrasidlo
patent: 4005012 (1977-01-01), Wrasidlo
patent: 4039440 (1977-08-01), Cadotte

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