| abstract |
An object of the present invention is to provide a semipermeable membrane having high solute removal properties, high water permeability, and high durability, and at the same time providing a semipermeable membrane capable of realizing high productivity and a method for producing the same. It is what. A composite semipermeable membrane formed by forming a polyamide separation functional layer comprising a polyfunctional amine compound and a polyfunctional acid halide on a microporous support membrane is reacted with a primary amino group to form a diazonium salt or A method and a process for producing a composite semipermeable membrane comprising a step of contacting with a reagent that generates the derivative, and then contacting with a hot water of 40 ° C. or more and 80 ° C. or less, and a step of contacting with a reactive reagent with a diazonium salt. Provide a method. [Selection figure] None |