Kawasaki Jukogyo Kabushiki Kaisha

Tosoh Corporation

Chlorine Engineers Corp., Ltd.

De Nora Permelec Ltd

Thyssenkrupp Uhde Chlorine Engineers (japan) Ltd.

Thyssenkrupp Nucera Japan Ltd.

Thyssenkruppp Uhde Chlorine Engineers (japan) Ltd.

Thyssenkrupp Uhde Chlorine Engineers Gmbh

Terumi Hashimoto

Akiyoshi Manabe

Akihiro Kato

Takamichi Kishi

Yuji Kamei

Takafumi Ito

Ikuo Shimomura

Koji Kawanishi

Fumio Sadahiro

Koki Taguchi

Yoshinari Take

Takaaki Matsuo

Toshikazu Hayashida

Sachio Kaneko

Kazuyuki Arai

Shota Shinohara

Tomonori Takase

Jun Kawaguchi

Provided are an anode for an ion exchange membrane electrolyzer which enables an aqueous solution of an alkali metal chloride to be electrolyzed at a lower voltage than a conventional anode and allows the concentration of an impurity gas included in an anode gas to be reduced and an ion exchange membrane electrolyzer using the same. The anode is an anode for an ion exchange membrane electrolyzer to be used in an ion exchange membrane electrolyzer that is separated by an ion exchange membrane into an anode chamber and a cathode chamber. The anode for an ion exchange membrane electrolyzer comprises at least one perforated flat metal plate(expanded metal) and the thickness of the perforated flat metal plate(expanded metal) ranges from 0.1 to 0.5 mm and the ratio of the short way SW to the long way LW (SW/LW) ranges from 0.45 to 0.55. The short way SW is preferably not more than 3.0 mm.

Anode for ion exchange membrane electrolysis vessel, and ion exchange membrane electrolysis vessel using same

A diaphragm includes a porous supporting body and a polymer porous membrane. When one of surfaces of the porous membrane is defined as a surface A, the other surface opposite to the surface A is defined as a surface B, a section of the porous membrane parallel to the surfaces A and B is defined as a section C, an average pore diameter on the surface A is defined as an average pore diameter D, an average pore diameter on the surface B is defined as an average pore diameter D, and an average pore diameter on the section C is defined as an average pore diameter D, the average pore diameters Dand Dare substantially equal to each other, and the average pore diameter Dis larger than each of the average pore diameters Dand D.

Alkaline water electrolysis diaphragm and method of manufacturing same

Provided is a method of preventing reverse current flow through an ion exchange membrane electrolyzer, which method is capable of preventing a reverse current from being generated after stopping operation of the ion exchange membrane electrolyzer. A method of preventing reverse current flow through an ion exchange membrane electrolyzer, the ion exchange membrane electrolyzerhaving an anode chamberhousing an anode, a cathode chamberhousing a cathode, an anode solution-supplying manifoldto feed anode solution to the anode chamber, and a cathode solution-supplying manifoldto feed cathode solution to the cathode chamber. After stopping operation of the ion exchange membrane electrolyzer, injected is a low electrical conductivity material with an electrical conductivity lower than that of the anode solution or the cathode solution to at least one of an anode solution-supplying pipewhich supplies the anode solution to the anode solution-supplying manifoldfrom an anode solution tankand a cathode solution-supplying pipewhich supplies the cathode solution to the cathode solution-supplying manifoldfrom a cathode solution tank

Method of preventing reverse current flow through an ion exchange membrane electrolyzer

The invention provides an ion exchange membrane electrolytic process unlikely to undergo any current density drop even when brine having a concentration lower than usual. Electrolysis occurs while the concentration of an aqueous solution of an alkaline metal chloride in an anode chamber partitioned by a cation exchange membrane is set at 2.7 mol/l to 3.3 mol/l, and a gap is provided between the cation exchange membrane and the anode.

Ion exchange membrane electrolytic process

Growing community of inventors

Tamano, Japan

Terumi Hashimoto