Reverse osmosis membranes of polyamideurethane

Details Reverse osmosis membranes of polyamideurethane Reverse osmosis membranes of polyamideurethane

1990-08-31

1992-02-04

Sever, Frank

Liquid purification or separation

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Material

21050041, 264DIG48, 264DIG62, 264 4, B01D 6108, B01D 6700, B01D 6900, B01D 7154

Patent

active

050857770

ABSTRACT:
The present invention is directed to an improved reverse osmosis membrane that shows surprisingly improved solute rejection and permeation properties. The membrane includes a separating layer of a polyamideurethane formed in situ by reaction of a haloformyloxy-substituted acyl haldide with a diamine-treated substrate.

REFERENCES:
patent: 4059365 (1977-11-01), Ivey et al.
patent: 4230463 (1980-10-01), Henis et al.

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