Reverse osmosis membrane and method for the preparation thereof

Details Reverse osmosis membrane and method for the preparation thereof Reverse osmosis membrane and method for the preparation thereof

C - Chemistry, Metallurgy

02

F

117/88.5

C02F 1/44 (2006.01) B01D 69/12 (2006.01) B01D 71/56 (2006.01) C08J 5/22 (2006.01)

Patent

CA 1220990

ABSTRACT OF THE DISCLOSURE An excellent reverse osmosis membrane having a high flux with superior chlorine resistance and low salt passage can be obtained by interfacially condensing a water soluble aromatic polyamide prepolymer with an essentially monomeric, aromatic, amine reactive polyfunctional acyl halide. The polyamide prepolymer may be prepared through the condensation reaction of an aromatic diamine and an aromatic anhydride. Preferably the amide prepolymer, prepared from metaphenylene diamine and trimelletic anhydride acid chloride, is reacted with trimesoylchloride to form the thin film membrane of the subject invention.

441485

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