Reverse osmosis membrane and process
AssigneeMembrane Technology and Research, Inc.
InventorsIngo Pinnau, Jennifer H. Ly, Richard W. Baker
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Abstract
A reverse osmosis membrane, and methods for making and using the membrane. The membrane has a continuous, defect-free, non-porous, hydrophilic coating that reduces the susceptibility to fouling.
Claims20
A coated reverse osmosis membrane, comprising a reverse osmosis membrane having reverse osmosis rejection capabilities in an uncoated state, coated with an essentially continuous, defect-free, non-porous, hydrophilic coating layer prepared from a water-insoluble polymer, and characterized in that the coating layer does not change the reverse osmosis rejection capabilities by more than 10% in either direction.
A process for reducing a propensity of a reverse osmosis membrane to fouling, comprising:
- (a) provided a reverse osmosis membrane having reverse osmosis rejection capabilities in an uncoated state;
- (b) depositing on a surface of the reverse osmosis membrane an essentially continuous, defect-free, non-porous, hydrophilic coating layer prepared from a water-insoluble polymer, whereby the propensity to fouling is reduced.
Dependencies are inferred from the claim text.