Semipermeable composite membrane and process for preparation...

Details Semipermeable composite membrane and process for preparation... Semipermeable composite membrane and process for preparation...

C - Chemistry, Metallurgy

02

F

182/15.3, 117/88

C02F 1/44 (2006.01) B01D 69/12 (2006.01) B01D 71/62 (2006.01) B01D 71/66 (2006.01)

Patent

CA 1120795

ABSTRACT OF THE DISCLOSURE A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of the microporous substrate, said polymeric material being prepared by interfacial crosslinking of a polymer containing a recurring unit of the formula Image (I) wherein each of R1 and R2 represents a hydrogen atom or a methyl group, and W1 represents a direct bonding or a sulfonyl group (-SO2-), with a polyfunctional compound containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate, N-haloformyl, haloformate and acid anhydride groups; and a process for producing the same. The semipermeable composite membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.

327836

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