Title:
CATION EXCHANGE MEMBRANE AND METHOD FOR PRODUCING POTASSIUM HYDROXIDE AQUEOUS SOLUTION
Document Type and Number:
WIPO Patent Application WO/2015/163238
Kind Code:
A1
Abstract:
Provided are a cation exchange membrane that resists swelling and elongation in the course of electrolysis of a potassium chloride aqueous solution even without water absorption and swelling immediately prior to mounting in an electrolyzer, and a method that makes it possible to stably produce a potassium hydroxide aqueous solution without needing to cause this membrane to absorb water and swell immediately prior to mounting in an electrolyzer. A cation exchange membrane containing a polymer having cation exchange groups, wherein the total of potassium ions and sodium ions among the cations (100 mol%) contained in the cation exchange membrane is 99 mol% or higher, the potassium ions being 80-98 mol% and the sodium ions being 20-2 mol% of the total (100 mol%) of potassium ions and sodium ions contained in a cation exchange membrane (1).
Inventors:
KUSANO HIROMITSU (JP)
KANEKO TAKAYUKI (JP)
YAMAKI YASUSHI (JP)
ENDO TAKAYUKI (JP)
KANEKO TAKAYUKI (JP)
YAMAKI YASUSHI (JP)
ENDO TAKAYUKI (JP)
Application Number:
PCT/JP2015/061749
Publication Date:
October 29, 2015
Filing Date:
April 16, 2015
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C08J5/22; B01J39/20; C25B1/16; C25B9/19; C25B13/08; C08F8/44; C08F214/18
Domestic Patent References:
| WO2002103083A1 | 2002-12-27 |
Foreign References:
| JPH0978280A | 1997-03-25 | |||
| JPH05112886A | 1993-05-07 | |||
| JPS55167050A | 1980-12-26 | |||
| JP2002538585A | 2002-11-12 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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