Asahi Glass Company, Limited

Mitsui Chemicals, Inc.

Kaneka Corporation

Tosoh Corporation

Asahi Kasei Chemicals Corporation

Tokuyama Corporation

Toagosei Company, Ltd.

Daiso Co., Ltd.

Chlorine Engineers Corp., Ltd.

Tatsuhito Kimura

Koji Saiki

Shinji Katayama

Kiyohito Asaumi

Mikio Suzuki

Mitsuharu Hamamori

Tsugiyoshi Osakabe

Hiroaki Aikawa

Naoya Okada

Osamu Ichinose

Kenji Nonomura

Takahiro Uchibori

Kiyoshi Hachiya

Hajime Ishizaka

Tatsushi Ozawa

In a gas diffusion electrode assembly, and in an electrolyzer using the same, a bonding piece having on at least one surface a perfluorosulfonic acid layer, a perfluorosulfonyl fluoride layer or an alkyl ester of perfluorocarboxylic acid layer is positioned at its perfluoro compound layer surface with respect to the gas diffusion electrode assembly. Adjacent gas diffusion electrodes are heat fusion bonded together, or heat fusion bonding is carried out using the bonding piece in a frame form. Adjacent gas diffusion electrodes are sealed up by heat fusion bonding, using a material that is similar to the material that forms the gas diffusion electrodes.

Gas diffusion electrode assembly, bonding method for gas diffusion electrodes, and electrolyzer comprising gas diffusion electrodes

The present invention has an object of providing a bipolar type ion exchange electrolytic cell which is capable of minimizing the anode-cathode distance by a movable system which has a low electric resistance and which is simple and inexpensive, thereby to substantially reduce the electrolysis voltage. The present invention is a bipolar type ion exchange membrane electrolytic cell comprising an anode compartment frame which comprises an anode plate and an anode back plate arranged in substantially parallel with each other with a spacing, conductive anode supporting members arranged with a prescribed spacing from one another between the anode plate and the anode back plate, and a cathode compartment frame which comprises a cathode plate and a cathode back plate arranged in substantially parallel with each other with a spacing, and conductive cathode supporting members arranged with a prescribed spacing from one another between the cathode plate and the cathode back plate, so that the respective back plates are connected back to back to form a compartment frame unit, a plurality of such compartment frame units being arranged with a cation exchange membrane interposed, wherein at least the cathode supporting members comprise a flexible member, and the cathode plate is movably supported by the function of the flexible member.

Bipolar ion exchange membrane electrolytic cell

A bipolar type ion exchange membrane electrolytic cell comprising an anode compartment frame which comprises an anode plate and an anode back plate arranged in substantially parallel with each other with a spacing, and a conductive anode supporting member arranged between the anode plate and the anode back plate, and a cathode compartment frame which comprises a cathode plate and a cathode back plate arranged in substantially parallel with each other with a spacing, and a conductive cathode supporting member arranged between the cathode plate and the cathode back plate, so that the anode back plate and the cathode back plate are connected back to back to form a partition wall for a bipolar electrolytic cell, wherein

Bipolar type ion exchange membrane electrolytic cell

A bipolar type ion exchange membrane electrolytic cell has gas-liquid separating chambers which minimizes a pressure fluctuation in compartment frame units, deterioration of ion exchange membranes and a voltage variation in the compartment units. Upper portions of back plates 5, 3a are outwardly bent at a higher position than meshed electrode plates of each of anode and cathode compartment frames to form inversed U-shape portions; U-shaped channel members 10 are respectively placed in and fixed to the inversed U-shape portions so that spaces are formed, as passages 12, in association with the back plates, and areas defined by the inversed U-shape portions and the U-shaped channel members are gas-liquid separating chambers.

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Yokohama, Japan

Tatsuhito Kimura