METHOD FOR PRODUCING COMPOSITE SEMIPERMEABLE MEMBRANE AND WATER USING THE SAME

    公开(公告)号:JP2004255368A

    公开(公告)日:2004-09-16

    申请号:JP2003408668

    申请日:2003-12-08

    Abstract: PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane having a high solute removing property and water permeability, the membrane being operable under a low pressure while preventing scaling thereon. SOLUTION: The composite semipermeable membrane having a crosslinked polyamide superthin film layer obtained by the polycondensation reaction of a polyfunctional amine and a polyfunctional acid halide on a fine porous supporting film is characterized in that the polyfunctional amine includes an ortho aromatic diamine having two amino groups at an ortho position (o-) and in that mole% o-aromatic diamine in the total polyfunctional amines in the superthin film is equal to 50-95% or lower according to the 1 H NMR method. COPYRIGHT: (C)2004,JPO&NCIPI

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