公开(公告)号：US10370511B2

公开(公告)日：2019-08-06

申请号：US15291121

申请日：2016-10-12

Applicant: AGC Inc.

Inventor： Hiromitsu Kusano ,  Takayuki Kaneko ,  Yasushi Yamaki ,  Takayuki Endo

IPC: B01J39/20 ,  C08J5/22 ,  C08F8/44 ,  C25B13/08 ,  C25B1/16 ,  B01J39/04 ,  C01D1/04 ,  C25B9/08 ,  B01J47/12 ,  C08F214/26

Abstract: To provide a cation exchange membrane which is less susceptible to swelling or elongation during electrolysis of a potassium chloride aqueous solution even without permitting water absorption or swelling immediately prior to mounting it in an electrolyzer, and a method whereby it possible to stably produce a potassium hydroxide aqueous solution without necessity to conduct an operation for water absorption or swelling immediately prior to mounting the membrane in the electrolyzer. A cation exchange membrane comprising a polymer having cation exchange groups, wherein in cations (100 mol %) contained in the cation exchange membrane, the total of potassium ions and sodium ions is at least 99 mol %, and in the total (100 mol %) of potassium ions and sodium ions contained in the cation exchange membrane, the potassium ions are 80-98 mol % and the sodium ions are 20-2 mol %.