Patent ID: 6015495
Filing Date: 2000-01-18
Classification: B01D

Abstract:
A polyamide membrane, said polyamide membrane comprising a reaction product of (i) an aqueous solution, said aqueous solution comprising a polyfunctional amine and a mixed solvent, said mixed solvent comprising water and a polar compound, said polar compound being selected from the group consisting of di(propylene glycol) monoalkyl ethers; alkyl-substituted 1,3-propanediols; di(ethylene glycol) hexyl ether; di(ethylene glycol) t-butyl methyl ether; tri(ethylene glycol) dimethyl ether; and 1,x-cyclohexanedimethanol wherein x is an integer from 2 to 4; and (ii) an organic solvent solution, said organic solvent solution comprising an amine-reactive reactant selected from the group consisting of a polyfunctional acyl halide, a polyfunctional sulfonyl halide and a polyfunctional isocyanate.