PRODUCTION METHOD FOR COMPOSITE REVERSE OSMOSIS MEMBRANE WITH HIGH SALT SUPPRESSION RATIO

摘要

PROBLEM TO BE SOLVED: To provide a composite reverse osmosis membrane having a high salt suppression ratio and excellent separation performance of a non-electrolytic organic substance such as IPA and a non-dissociation substance in a usual pH area such as boron, and to provide its production method. SOLUTION: The method for producing the composite reverse osmosis membrane comprising a polyamide-based skin layer and a fine porous support for supporting the layer is characterized in that the fine porous support is covered with an aqueous solution A containing a compound having two or more of reactive amino groups to form a covering layer and a solution B containing a multi-functional acid halide having two or more of reactive acid halide groups is subsequently brought into contact with the covering layer in an organic solvent containing cycloparaffin (CnH2n) having 7 or more of carbon numbers. COPYRIGHT: (C)2006,JPO&NCIPI