Patent ID: 6833073
Filing Date: 2004-12-21
Classification: B01D

Abstract:
A filtration membrane for separating a contaminant from a feed fluid to produce a product fluid, said membrane comprising:a porous substrate having a first surface; and a product fluid-permeable layer cast on said first surface of said porous substrate, said layer comprising the interfacial polymerization reaction product of an aqueous amine solution and an acyl halide solution, wherein said aqueous amine solution is prepared from a propionic salt, an amine, and water, and said acyl halide solution includes an acyl halide and an organic solvents, and wherein the filtration membrane exhibits about 98% to 99.5% magnesium sulfate rejection and fluid fluxes of about 70 to 100 gallons/ft2 per day for an aqueous magnesium sulfate solution at about 2000 ppm at about 100 psi and about 77Â° Fahrenheit.