Asahi Glass Company, Limited

Toyota Jidosha Kogyo Kabushiki Kaisha

Jeco Co., Ltd.

Makoto Nakao

Kimihiko Sato

Yasuo Sajima

Junjiro Iwamoto

Takahiro Uchibori

Hidenori Shibata

Hiroki Yano

Takeo Aikawa

Hiroshi Mori

Takeshi Morimoto

Manabu Suhara

Yoshio Sugaya

Hirokazu Wakabayashi

Yukio Matsumura

Makoto Noshiro

Hirofumi Horie

Eiji Itoi

Takashi Nakayama

Mashiro Takamatsu

Isao Ogawa

A monopolar ion exchange membrane electrolytic cell assembly comprising a plurality of unit electrolytic cells connected electritically in parallel to one another, each formed by clamping an anode compartment frame and a cathode compartment frame with an ion exchange membrane interposed therebetween, the anode and cathode compartment frames each having a feeding and discharging system for an electrolyte and a discharging system for generated gas, wherein:

Monopolar ion exchange membrane electrolytic cell assembly

A vapor permselective membrane consisting essentially of an ion exchange membrane made of a fluorine-containing polymer having a fixed ion concentration of from 1 to 6N, a water content of from 20 to 250% by weight and an ion exchange capacity of from 0.6 to 2.5 meq/g dry resin, the ion exchange membrane having a thickness of from 0.1 to 300 .mu.m and a moisture content of from 1 to 10% by weight, the permselective membrane having a water vapor permeation rate of at least 50 m.sup.3 /m.sup.2.atm.

Vapor permselective membrane

An alkali metal chloride-electrolyzing cell comprises a cation-exchange membrane disposed between an anode and a cathode, characterized in that said cation-exchange membrane has on at least one side thereof a gas- and liquid-permeable, porous layer with no electrode activity, and at least one of an anode and a cathode is a voided flexible electrode having a more rigidity than that of said cation-exchange membrane, and said flexible electrode is designed to be forcibly deformed thereby closely contacting said cation-exchange membrane with the surface of each of said electrodes.

Alkali metal chloride electrolyzing cell

A process for electrolyzing an aqueous solution of an alkali metal chloride by feeding said aqueous solution of an alkali metal chloride into the central space of a hollow quadrilateral frame holding an anode therein, defining an anode compartment, and feeding water or a dilute aqueous solution of an alkali metal hydroxide into the central space of a hollow quadrilateral frame holding a cathode therein, defining a cathode compartment, said anode compartment and said cathode compartment being separated by a cation exchange membrane, in a filter-press type electrolytic cell wherein:

Process for electrolyzing aqueous solution of alkali metal chloride

An apparatus for illuminating instrument pointers comprises a dial board having a shaft hole, pointer shafts provided perpendicularly to a pointer shaft drive unit and projecting through the shaft hole to the front of the dial board, a light conductive member having a light receiving section and a light transmission section made of a transparent material and disposed behind the dial board, a plurality of instrument pointers each having a collar section and a pointer section made of a transparent material and mounted on the pointer shaft such that a light beam emitted from the light transmission section is introduced through the collar section, and a light emitting member provided oppositely to the light receiving section. A light beam from the light emitting member is propagated through the light conductive member to the collar section and then to the pointer section, so that each instrument pointer is illuminated.

Apparatus for illuminating instrument pointers

An alkali metal hydroxide is produced by electrolyzing an aqueous solution of an alkali metal chloride fed into an anode compartment in a cell having an anode compartment and a cathode compartment formed by partitioning with a cation exchange membrane. A cation exchange membrane of a fluorinated polymer having carboxylic acid groups at a content of 0.9 to 2.0 meq./g. dry resin is used as said cation exchange membrane and a metal or a metal ion is incorporated in said aqueous solution of an alkali metal chloride to form a thin layer made of a metal hydroxide or oxide on the surface of said membrane in the anode compartment.

Process for producing alkali metal hydroxide

A purification of an aqueous solution of potassium chloride which is used for producing potassium hydroxide by an electrolysisin an electrolytic cell using a cation exchange membrane is carried out by incorporating an oxidizing reagent to remove additives as an anticaking reagent.

Purification of aqueous solution of potassium chloride

Growing community of inventors

Yokohama, Japan

Makoto Nakao