METHOD FOR MANUFACTURING POROUS HOLLOW FIBER MEMBRANE

摘要

The purpose of the present invention is to provide a method for manufacturing a porous hollow fiber membrane in which the amount of a hypochlorite used during pore forming agent removal treatment can be reduced and the facilities cost can be minimized, and in which the post-treatment waste liquid can be readily treated. This method for manufacturing a porous hollow fiber membrane has: coagulating a membrane forming material liquid containing a membrane forming resin and a pore forming agent by a coagulating liquid, to thereby form a porous hollow fiber membrane precursor; and
removing the porous hollow fiber membrane precursor impregnated at least with a liquid into contact with ozone gas in a vapor phase, to thereby decompose and remove the pore forming agent present in the membrane.

主权项

1. A method of manufacturing a porous hollow fiber membrane, the method comprising:
coagulating a membrane forming material liquid comprising a membrane forming resin and a pore forming agent by a coagulating liquid, to thereby form a porous hollow fiber membrane precursor; and removing the porous hollow fiber membrane precursor impregnated at least with a liquid in contact with ozone gas in a vapor phase, to thereby decompose and remove the pore forming agent present in the membrane.