Composite membrane and method for making the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 8, 2002
Grant Date -
N/A
app pub date -
Apr 17, 2000
filing date -
Apr 17, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A composite membrane and method for making the same, comprising a porous support and a crosslinked polyamide surface. The subject membrane provides improved flux and/or rejection rates. The subject membrane is further capable of operating at lower operating pressures. The subject method includes reacting a polyfunctional amine with a polyfunctional acyl halide to form a polyamide. The method includes the step of contacting a phosphorous containing compound with the polyfunctional acyl halide prior to and/or during the reaction between the polyfunctional acyl halide and a polyfunctional amine. The subject process is easily adapted to commercial scale manufacturing processes and is particularly suited for making nanofiltration and reverse osmosis composite membranes.
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Cited Art Landscape
Patent Citation Ranking
- 123 Citation Count
- B01D Class
- 99.60 % this patent is cited more than
- 23 Age