| abstract |
(57) [Summary] [Object] The present invention provides a method for producing a composite reverse osmosis membrane which has high permeability at low pressure and which can selectively separate components of a liquid mixture. [Structure] A porous support is coated with an aqueous solution containing a compound having two or more reactive amino groups, and then an organic solvent containing a polyfunctional acid halide is brought into contact with the aqueous solution phase to carry out an interfacial reaction. In the method for producing a composite reverse osmosis membrane having a polyamide-based skin layer, the quaternary ammonium salt is added to the aqueous solution, the pH of the aqueous solution is set to 11 or more, and heat treatment is performed at 100 ° C. or more after the interfacial reaction. It is characterized by |