Patent ID: 8801935
Filing Date: 2014-08-12
Classification: B01D,Y10S

Abstract:
1. A process for preparing a reverse osmosis membrane, comprising: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive consisting of Z (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, in the presence of the 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, 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.