Toyo Soda Manufacturing Co., Ltd.

Chlorine Engineers Corp., Ltd.

Nobuhiro Kawasaki

Shinji Katayama

Teruo Ichisaka

Takao Satoh

Naoki Yoshida

Michihiro Akazawa

Takashi Yoshitugu

Masaki Murakami

Process or producing caustic alkalis or alkali hydroxides by electrolysis, employing a double electrode-type electrolysis tank in which a cation exchange membrane is provided to divide the inside of the tank into cathode and anode compartments, supplying to the anode compartment an alkali chloride, supplying water or a dilute solution of an alkali hydroxide into the cathode compartment, and taking away the alkali hydroxide and the hydrogen gas produced by electrolysis, in a mixed state of gas and liquid from the cathode compartment. The electrolysis tank comprises a number of finger-anodes extending from one of the walls of the tank and a number of finger-like hollow cathodes extending from the other wall of the tank, into which the finger-anodes project to form a gap therebetween, and a cation exchange membrane extending through the gap to divide the inside of the tank into cathode and anode compartments.

Process for producing caustic alkalis

Electrolytic cell of single electrode type or multiple electrodes type, which is divided into the anode chamber and the cathode chamber with employing a cation exchange membrane and used for the electrolysis of the aqueous solution of alkali chloride, characterized in comprising

Electrolytic cell

An alkali metal chloride is electrolyzed in a diaphragm electrolytic cell equipped with an asbestos diaphragm prepared by using asbestos fiber fluffed with a turbo rotary mill before fabrication.

Electrolysis of alkali metal chloride

Growing community of inventors

Yamaguchi, Japan

Nobuhiro Kawasaki