Claims
- 1. A chemically cross-linked non-fouling polymeric membrane including polyelectrolytes having fixed-charge groups and characterized by a hydraulic permeability of 10.sup..sup.-3 to 10.sup..sup.-7 cm/sec. atm. measured in water or dilute salt solution under a pressure of 60 to 100 psi, a water content of from about 15 to about 75%, and characterized by a uniform porosity which produces a salt rejection of from 1.0 to 85% measured using 0.01 M potassium chloride solution at 25.degree.C and 60 to 100 psi.
- 2. The polymeric membrane of claim 1, wherein the fixed-charge groups are supplied by a polyelectrolyte containing sulfonic acid radicals.
- 3. The polymeric membrane of claim 1, wherein the fixed-charge groups are supplied by a polyelectrolyte containing quaternary ammonium radicals.
Parent Case Info
This is a division of application Ser. No. 166,606, filed July 27, 1971, now U.S. Pat. No. 3,808,305.
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Divisions (1)
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Number |
Date |
Country |
Parent |
166606 |
Jul 1971 |
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