HYBRID TFC RO MEMBRANES WITH NON-METALLIC ADDITIVES

HYBRID TFC RO MEMBRANES WITH NON-METALLIC ADDITIVES

A process for preparing a reverse osmosis membrane that includes: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive having the formula Z+B−, where Z+ is an easily dissociable cation and B− is a beta-diketonate; (B) combining the polyamine, polyfunctional acid ha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KOEHLER JEFFREY ALAN, KURTH CHRISTOPHER JAMES
Format: Patent
Sprache:eng
Schlagworte:
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:A process for preparing a reverse osmosis membrane that includes: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive having the formula Z+B−, where Z+ is an easily dissociable cation and B− is a beta-diketonate; (B) combining the polyamine, polyfunctional acid halide, and flux increasing additive on the surface of a porous support membrane; and (C) interfacially polymerizing the polyamine and the polyfunctional acid halide, and flux increasing additive on the surface of the porous support membrane to form a reverse osmosis membrane comprising (i) the porous support membrane and (ii) a discrimination layer comprising a polyamide. The reverse osmosis membrane is characterized by a flux that is greater than the flux of the same membrane prepared in the absence of the flux increasing additive.