Multilayer reverse osmosis membrane of polyamide-urea

Details Multilayer reverse osmosis membrane of polyamide-urea Multilayer reverse osmosis membrane of polyamide-urea

1990-07-31

1991-05-28

Sever, Frank

Liquid purification or separation

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Material

21050038, B01D 7154, B01D 7156, B01D 7160

Patent

active

050192647

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 polyamideurea formed in situ by reaction of isocyanate-substituted acyl chloride and a diamine-treated microporous substrate.

REFERENCES:
patent: 4366062 (1982-12-01), Kurihara et al.

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