Abrégé

To provide an electrolysis electrode having a more preferable shape in electrolyzing pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride at a lower voltage than ever before, and an electrolyzer using the same. An electrolysis electrode or the like including: a metal perforated plate having a value of Factor V of 40 or more represented by the following formula; Factor V = Rs × Rc × F/100000, in which Rs is a planar direction surface area per unit area 1 dm2[cm2/dm2], Rc is a thickness direction surface area per unit area 1 dm2[cm2/dm2], and F is the number of mesh apertures per unit area 1 dm2(fine degree) [number/dm2].

Classes IPC  ?

• C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes
• C25B 11/03 - ÉlectrodesLeur fabrication non prévue ailleurs caractérisées par la configuration ou la forme perforées ou foraminées

Abrégé

Provided is an alkaline water electrolyzer in which leakage of aqueous alkali solutions is prevented. The alkaline water electrolyzer 10 includes an anode chamber frame 11 defining an anode chamber 12; a cathode chamber frame 17 defining a cathode chamber 18; a porous diaphragm 16 disposed between the anode and cathode chamber frames 11 and 17 and partitioning the anode and cathode chambers 12 and 18; an anode gasket 15 disposed on the anode chamber frame 11; and a cathode gasket 21 disposed on the cathode chamber frame 17, wherein when the anode and cathode chamber frames 11 and 17 are fastened, the porous diaphragm 16 is held between the anode and cathode chamber frames 11 and 17 via the anode and cathode gaskets 15 and 21 and the anode and cathode gaskets 15 and 21 are in contact with each other around the peripheral edge of the porous diaphragm 16 by compressing the anode and cathode gaskets 15 and 21.

Classes IPC  ?

• C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
• C02F 1/46 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par des procédés électrochimiques
• C25B 13/02 - DiaphragmesÉléments d'espacement caractérisés par la configuration ou la forme
• C25B 9/19 - Cellules comprenant des électrodes fixes de dimensions stablesAssemblages de leurs éléments de structure avec des diaphragmes
• C02F 1/461 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par des procédés électrochimiques par électrolyse

Abrégé

Provided is an alkaline water electrolysis device which prevents an alkaline aqueous solution from leaking. This alkaline water electrolysis device 10 has: a positive electrode chamber frame 11 for defining a positive electrode chamber 12; a negative electrode chamber frame 17 for defining a negative electrode chamber 18; and a porous diaphragm 16 which is disposed between the positive electrode chamber frame 11 and the negative electrode chamber frame 17, and partitions a space into the positive electrode chamber 12 and the negative electrode chamber 18, wherein: a positive electrode gasket 15 is disposed on the positive electrode chamber frame 11; a negative electrode gasket 21 is disposed on the negative electrode chamber frame 17; and when the positive electrode chamber frame 11 and the negative electrode chamber frame 17 are fastened, the porous diaphragm 16 is sandwiched between the positive electrode chamber frame 11 and the negative electrode chamber frame 17 with the positive electrode gasket 15 and the negative electrode gasket 21 therebetween, the positive electrode gasket 15 and the negative electrode gasket 21 are compressed, and the positive electrode gasket 15 and the negative electrode gasket 21 contact each other at a circumferential end portion of the porous diaphragm 16.

Classes IPC  ?

• C25B 9/19 - Cellules comprenant des électrodes fixes de dimensions stablesAssemblages de leurs éléments de structure avec des diaphragmes
• C25B 9/60 - Éléments de structure des cellules
• C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
• C25B 13/02 - DiaphragmesÉléments d'espacement caractérisés par la configuration ou la forme

Abrégé

Provided is an alkaline water electrolysis device which prevents an alkaline aqueous solution from leaking. This alkaline water electrolysis device 10 has: a positive electrode chamber frame 11 for defining a positive electrode chamber 12; a negative electrode chamber frame 17 for defining a negative electrode chamber 18; and a porous diaphragm 16 which is disposed between the positive electrode chamber frame 11 and the negative electrode chamber frame 17, and partitions a space into the positive electrode chamber 12 and the negative electrode chamber 18, wherein: a positive electrode gasket 15 is disposed on the positive electrode chamber frame 11; a negative electrode gasket 21 is disposed on the negative electrode chamber frame 17; and when the positive electrode chamber frame 11 and the negative electrode chamber frame 17 are fastened, the porous diaphragm 16 is sandwiched between the positive electrode chamber frame 11 and the negative electrode chamber frame 17 with the positive electrode gasket 15 and the negative electrode gasket 21 therebetween, the positive electrode gasket 15 and the negative electrode gasket 21 are compressed, and the positive electrode gasket 15 and the negative electrode gasket 21 contact each other at a circumferential end portion of the porous diaphragm 16.

Classes IPC  ?

• C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
• C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes
• C25B 13/02 - DiaphragmesÉléments d'espacement caractérisés par la configuration ou la forme

Abrégé

B.

Classes IPC  ?

• C25B 13/02 - DiaphragmesÉléments d'espacement caractérisés par la configuration ou la forme
• C25B 13/08 - DiaphragmesÉléments d'espacement caractérisés par le matériau à base de matériaux organiques
• C25B 1/10 - Production électrolytique de composés inorganiques ou de non-métaux d'hydrogène ou d'oxygène par électrolyse de l'eau dans des cellules à diaphragme

Abrégé

The diaphragm according to the present invention is provided with a porous support and a polymer porous film impregnated in the support from one surface of the support. When one surface of the porous film is specified as A, the surface on the reverse side thereof from the surface A is specified as B, a cross section of the porous film parallel to the surface A and the surface B is specified as the cross section C, the average pore diameter in the surface A is specified as DA, the average pore diameter in the surface B is specified as DB, and the average pore diameter in the cross section C is specified as DC, the average pore diameter DA and the average pore diameter DB are essentially the same, and the average pore diameter DC is greater than the average pore diameter DA and the average pore diameter DB. When a cross section or surface parallel to the surface A and the surface B in an impregnated region of the porous film is specified as face S, and the average pore diameter in the face S is specified as DS, the average pore diameter DS is equal to or greater than the average pore diameter DA or the average pore diameter DB and is less than a lower-limit value of the bubble diameter distribution of bubbles generated at an electrode in alkaline water electrolysis.

Classes IPC  ?

• C25B 13/02 - DiaphragmesÉléments d'espacement caractérisés par la configuration ou la forme
• C25B 1/10 - Production électrolytique de composés inorganiques ou de non-métaux d'hydrogène ou d'oxygène par électrolyse de l'eau dans des cellules à diaphragme
• C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
• C25B 13/08 - DiaphragmesÉléments d'espacement caractérisés par le matériau à base de matériaux organiques

Abrégé

This application provides an alkaline water electrolysis diaphragm having a good gas barrier, ion permeability, mechanical strength, and electrical insulation. The diaphragm includes a porous supporting body and a polymer porous membrane impregnated therein. The porous membrane includes surface A, surface B, opposite to surface A, and section C, parallel to surfaces A and B. Surface A has an average pore diameter, D A, surface B has an average pore diameter, D B, and section C has an average pore diameter, D C; where D A and D B are substantially equal to each other, and D C is larger than both D A and D B. The porous membrane includes a section S, which is parallel to surfaces A and B and has an average pore diameter, D S, that is not less than D A or D B and smaller than a lower limit of a bubble diameter distribution of bubbles generated at an electrode in alkaline water electrolysis.

Classes IPC  ?

• C25B 13/02 - DiaphragmesÉléments d'espacement caractérisés par la configuration ou la forme
• C25B 13/08 - DiaphragmesÉléments d'espacement caractérisés par le matériau à base de matériaux organiques

Abrégé

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 100, the ion exchange membrane electrolyzer 100 having an anode chamber 107 housing an anode, a cathode chamber 110 housing a cathode, an anode solution-supplying manifold 121 to feed anode solution to the anode chamber 107, and a cathode solution-supplying manifold 124 to feed cathode solution to the cathode chamber 110. After stopping operation of the ion exchange membrane electrolyzer 100, 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 pipe 127 which supplies the anode solution to the anode solution-supplying manifold 121 from an anode solution tank 123 and a cathode solution-supplying pipe 128 which supplies the cathode solution to the cathode solution-supplying manifold 124 from a cathode solution tank 123.

Classes IPC  ?

• C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
• C25B 9/16 - Cellules ou assemblages de cellules comprenant au moins une électrode constituée de particules; Assemblages de leurs éléments de structure
• C25B 15/00 - Conduite ou entretien des cellules
• C25D 17/00 - Éléments structurels, ou leurs assemblages, des cellules pour revêtement électrolytique
• C25C 1/00 - Production, récupération ou affinage électrolytique des métaux par électrolyse de solutions
• C25B 15/02 - Commande ou régulation des opérations
• C25B 15/08 - Alimentation ou vidange des réactifs ou des électrolytesRégénération des électrolytes
• C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
• C25B 1/26 - ChloreSes composés
• C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes

Abrégé

　Provided is an ion-exchange membrane electrolytic cell in which an elastic cushion material is fixed simply and firmly to a current collector plate. An ion-exchange membrane electrolytic cell in which an elastic cushion material, formed from a metal elastic body wound around a corrosion-resistant frame, is arranged between a flexible electrode and a porous current collector plate, the corrosion-resistant frames 60, 70 that constitute the elastic cushion material having fixing parts 60a, 70a for engaging with the porous current collector plate and being fixed to the porous current collector plate by the fixing parts 60a, 70a.

Classes IPC  ?

• C25B 9/02 - Supports d'électrodes
• C25B 1/46 - Production simultanée d'hydroxydes des métaux alcalins et de chlore, de ses oxyacides ou de ses sels, p. ex. électrolyse chlore-alcali dans des cellules à diaphragmes
• C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
• C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes

Abrégé

　Provided are: an anode for an ion exchange membrane electrolysis vessel with which an alkali metal chloride aqueous solution can be electrolyzed at lower voltage than in the past, and which can reduce the concentration impurity gases contained in the anode gas; and an ion exchange membrane electrolysis vessel that uses the same. This anode for an ion exchange membrane electrolysis vessel is used in an ion exchange membrane electrolysis vessel which is divided into an anode chamber and a cathode chamber by an ion exchange membrane. The anode for an ion exchange membrane electrolysis vessel is provided with a least one apertured metal plate (1) (expanded metal (1)), the apertured metal plate (1) (expanded metal (1)) having a thickness of 0.1-0.5 mm, and a ratio SW/LW of the short axis (SW) and the long axis (LW) of 0.45-0.55. The short axis (SW) is preferably 3.0 mm or less.

Classes IPC  ?

• C25B 11/03 - ÉlectrodesLeur fabrication non prévue ailleurs caractérisées par la configuration ou la forme perforées ou foraminées

Abrégé

A diaphragm (90) for alkaline water electrolysis is configured of: a polymer porous layer (91) which contains at least one polymer compound that is selected from among polyethersulfones and polysulfones, each having a contact angle of 20-90°; and an organic fiber fabric layer (92) that is bonded to the polymer porous layer (91). The polyethersulfones having a contact angle of 20-90° are one or more polymer compounds that are selected from the group consisting of polyethersulfones, hydrophilic polyethersulfones, cationic polyethersulfones and cationic hydrophilic polyethersulfones. The polysulfones having a contact angle of 20-90° are one or more polymer compounds that are selected from the group consisting of polysulfones, hydrophilic polysulfones, cationic polysulfones and cationic hydrophilic polysulfones.

Classes IPC  ?

• C25B 13/08 - DiaphragmesÉléments d'espacement caractérisés par le matériau à base de matériaux organiques
• C08J 9/28 - Mise en œuvre de substances macromoléculaires pour produire des matériaux ou objets poreux ou alvéolairesLeur post-traitement par élimination d'une phase liquide d'un objet ou d'une composition macromoléculaire, p. ex. par séchage du coagulum
• C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés

Abrégé

Provided are an elastic cushion member and an ion exchange membrane electrolyzer using the same, which elastic cushion member can be installed even in an ion exchange membrane electrolyzer having such a small gap between an electrode and an electrode current collecting plate that a conventional elastic cushion member cannot be arranged therein. An elastic cushion member (10) has a pair of corrosion-resistant metal thin plates (11) arranged at a distance in parallel fashion and a fixing member (12) which fixes the pair of corrosion-resistant metal thin plates (11) and comprises a metal elastic body (13) wound between the pair of corrosion-resistant metal thin plates (11). The fixing member (12) is attached to the pair of corrosion-resistant metal thin plates (11) in a manner that enables detachment of the fixing member therefrom. The metal elastic body (13) is preferred to be a metal coil body. It is also preferable that each of the corrosion-resistant metal thin plates (11) is provided with a slippage prevention means.

Classes IPC  ?

• C25B 9/02 - Supports d'électrodes
• C25B 15/04 - Régulation de la distance inter-électrodes
• C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes
• C25B 9/06 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure

Abrégé

a), the surface being opposite to the surface to which the V-shaped springs (3) are attached, and a conductive member (4) is disposed near one end on the opening side of a V-shaped spring (3), which conductive member (4) is electrically connected with the V-shaped spring (3) when the V-shaped spring (3) is compressed.

Classes IPC  ?

• C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes
• C25B 9/02 - Supports d'électrodes
• C25B 1/46 - Production simultanée d'hydroxydes des métaux alcalins et de chlore, de ses oxyacides ou de ses sels, p. ex. électrolyse chlore-alcali dans des cellules à diaphragmes