Other

Tanaka Kikinzoku Kogyo K.k.

Satoshi Motoo

Nagakazu Furuya

Masahiro Watanabe

Disclosed herein are processes for preparing a raw material dispersion and raw material powders for producing reaction layers of a gas permeable electrode. The raw materials are prepared in one aspect of the invention by mixing fine particles containing a surface-active agent, freezing the mixture to a temperature the surface-active agent loses at least part of its function and then thawing out the same. The resulting material exhibits superior catalytic performance because the particles are dispersed uniformly by lack of the function of surfaceactive agent at the time of freezing. The raw materials are prepared in another aspect of the invention by mixing hydrophilic minute particles coated with ion exchange resin, PTFE and hydrophobic fine powders. The resulting material exhibits superior catalytic performance because catalysts contained in the hydrophilic minute particles are neither liberated nor made to flow so that the initial catalytic activities are substantially maintained even after a relatively long period of use.

Process for preparing raw materials for reaction layer of gas permeable

Disclosed herein is a gas permeable electrode which comprises a gas permeable layer and a reaction layer, the reaction layer comprising hydrophobic portions and hydrophilic portions. Electrolyte penetrates into the reaction layer and does not penetrate into the gas permeable layer, and only the gas produced on the electrode and the gas supplied penetrate into the gas permeable layer. The gas can be released from the rear side of the electrode and the reaction surface thereof is never covered with the gas.

Gas permeable electrode

Disclosed herein are processes for preparing a raw material dispersion and raw material powders for producing reaction layers of a gas permeable electrode. The raw materials are prepared in one aspect of the invention by mixing fine particles containing a surface-active agent, freezing the mixture to a temperature at which the surface-active agent loses at least part of its function and then thawing out the same. The resulting material exhibits superior catalytic performance because the particles are dispersed uniformly by the lack of function of the surface-active agent at the time of freezing. The raw materials are prepared in another aspect of the invention by mixing hydrophilic minute particles coated with an ion exchange resin, PTFE and hydrophobic fine powders. The resulting material exhibits superior catalytic performance because catalysts contained in the hydrophilic minute particles are neither liberated nor made to flow so that the initial catalytic activities are substantially maintained even after a relatively long period of use.

Process for preparing materials for reaction layer of gas permeable

A method for producing a highly dispersed catalyst comprising mixing a cross linking agent with a polymer in a solvent to cross-link the polymer, applying the cross-linked mixed liquid to a carrier, drying the carrier to remove the solvent and to form a polymer film over the surface of the carrier, impregnating the polymer film with a metallic complex compound solution to connect the complex compound to a reactive functional group of the polymer film, and reducing the complex compound of the polymer film, thereby obtaining the highly dispersed catalyst having superior catalytic properties and superior catalytic efficiency.

Method for producing highly dispersed catalyst

The present invention is a method and an apparatus for electrolyzing zinc. The method comprises vertically disposing a rotatable disk made of an electrically conductive metal functioning as a cathode at least of which an outer periphery has an insulation covering; immersing the lower portion of the disk into an electrolyte; disposing a circular arc shaped gas permeable electrode functioning as an anode to be closely opposed to the lower portion of the expressed portion of the both sides of the rotatable disk in the electrolyte; operating the electrolysis with the supply of hydrogen; and peeling off the zinc foil deposited onto the exposed portion of the both sides of the rotatable disk with rotation of the disk. This method can be modified by replacing the rotatable disk with a rotatable drum. The apparatus comprises a rotatable disk cathode made of an electrically conductive metal at least of which an outer periphery has an insulation covering and which is supported vertically and rotatably at the center of the electrolytic cell; a circular arc shaped gas permeable electrode functioning as an anode, and closely opposed to the lower portion of the both sides of the cathode, and fixed to the walls of the electrolytic cell; an electrolyte circulation path located at the desired portion of the anode; and a supply port and a discharge port for hydrogen located at the desired portion of the anodes. This apparatus can be modified by replacing the rotatable disk with a rotatable drum.

Method for electrolyzing zinc and apparatus therefor

An electrode device for an electromagnetic fluid flow apparatus, comprising a pair of electrodes which face a pathway of an electrical conductive fluid, and a magnet which faces the pathway and effects a magnetic field in a direction perpendicular to the flow direction of the electrical conductive fluid and to a straight line connecting the two electrodes. Each electrode is made of a hydrophobic carrier with pores of at most 1 .mu.m pore size, the hydrophobic porous carrier having electrical conductivity, gas permeability and liquid impermeability. A gas generated from the electrode may be discharged from the rear surface of the electrode to the outside without releasing from the surface of the electrode into the electrical conductive fluid.

Electrode device for electromagnetic fluid flow apparatus

Disclosed herein is a halogen cell of which a positive electrode and/or a negative electrode is a gas permeable electrode. The gas permeable electrode preferably comprises a hydrophilic layer and a gas permeable layer. Since, in this halogen cell, the decrease of the electrode surface area can be prevented, and the desired gas can be rapidly supplied to the electrode, the quantity of charge is increased and the charging time is reduced. Also disclosed herein is a halogen cell of which a positive electrode and/or negative electrode comprises finely divided hydrophilic portions and hydrophobic portions. In this halogen cell, the quantity of charge and the charging time are also improved.

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Yamanashi, Japan

Satoshi Motoo