Patent ID: 8177978
Filing Date: 2012-05-15
Classification: B01D,B05D,C02F,Y02A

Abstract:
1. A process for preparing a reverse osmosis membrane, comprising: (A) providing a polyamine, a polyfunctional acid halide, a flux increasing additive selected from the group consisting of a beta-diketonate, a fluorinated beta-diketonate and combinations thereof, and nanoparticles; (B) combining the polyamine, polyfunctional acid halide, flux increasing additive, and nanoparticles on the surface of a porous support membrane; and (C) interfacially polymerizing the polyamine and the polyfunctional acid halide 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 and the nanoparticles, wherein 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.