Provided are a VP-based anion exchange membrane in which membrane shrinkage due to contact with water is suppressed and which has excellent dimensional stability, a method for producing the same, and an acid recovery electrodialysis device that uses the VP-based anion exchange membrane having excellent dimensional stability. The anion exchange membrane has a base material sheet and an anion exchange resin layer reinforced by the base material sheet, the anion exchange membrane being characterized in that the anion exchange resin layer contains the anion exchange resin having one or both of a pyridinium group and a pyridyl group, and that the base material sheet is made of a polyolefin nonwoven fabric.
B01D 71/82 - Macromolecular material not specifically provided for in a single one of groups characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
B01D 69/00 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor
B01J 41/14 - Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
B01J 47/12 - Ion-exchange processes in generalApparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
C02F 1/469 - Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
Goods & Services
constant temperature incubators; air-gas producing apparatus in laboratories anaesthetic inhalers; oxygen inhalators for therapeutic purposes, sold empty; sprayers for medical purposes; humidifiers for medical use
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Electrolytic cells; gas alarms; laboratory apparatus and instruments; laboratory experimental apparatus and instruments; air-gas producers for scientific experiments in laboratories; constant temperature incubators for laboratory use; measuring or testing apparatus and instruments; gasometers [measuring instruments]; hygrometers. Medical apparatus and instruments; medical diagnostic apparatus and instruments; anesthetic inhalers [sold empty]; sprayers for medical purposes; oxygen inhalators for therapeutic purposes; dental apparatus and instruments; auxiliary medical devices and orthodontic apparatus. Drying apparatus; steamers for chemical processing; evaporators; heat exchangers; air conditioners; laundry dryers; dish drying machines.
4.
ION-EXCHANGE MEMBRANE, AND METHOD FOR PRODUCING SAME
Provided is an ion-exchange membrane which is not susceptible to liquid leakage. The ion exchange membrane comprises: a porous base material 11; and an ion-exchange resin layer laminated on a first surface 11a of the porous base material 11, or an ion-exchange resin layer 13 impregnated on the first surface 11a side of the porous base material 11, wherein the porous base material 11 has voids remaining at least on the side of a second surface 11b opposite to the first surface 11a, and voids at the peripheral edge of the porous base material 11 are closed using a filling resin 14.
B01J 39/20 - Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
B01J 41/14 - Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
B01J 47/12 - Ion-exchange processes in generalApparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
B32B 5/18 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material
5.
ION EXCHANGE MEMBRANE AND METHOD FOR PRODUCING ION EXCHANGE MEMBRANE WITH CATALYST LAYER
The present invention provides: an ion exchange membrane which is not susceptible to swelling due to an aromatic compound even in a usage environment of an electrolytic hydrogenation apparatus; and a method for producing an ion exchange membrane with a catalyst layer. The present invention provides a method wherein a precursor resin is produced by polymerizing a monomer solution that has been filled into a base material, and a sulfonic acid type ion exchange group is subsequently introduced into the precursor resin. With respect to this method, the base material is a nonwoven fabric, a woven fabric or a porous membrane, each of which is configured from one or more resins that are selected from among polyolefins and fluororesins; and the monomer solution contains one or more monomers for ion exchange group introduction, the monomers being selected from among styrene, α-methyl styrene, vinyl naphthalene and vinyl toluene, and one or more crosslinkable monomers that are selected from among divinyl benzene and divinyl naphthalene.
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/054 - Electrodes comprising electrocatalysts supported on a carrier
C25B 11/081 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the element being a noble metal
6.
Processing method of base material sheet, manufacturing method of modified base material sheet, base material with grafted polymer chain, and ion exchange membrane
A processing method of a base material sheet includes winding out the base material sheet wound up by a first core and a first porous sheet wound up by a second core, winding up by a third core the base material sheet and the first porous sheet to be overlapped with each other, and processing the base material sheet by a first processing liquid held in the first porous sheet; and winding out the base material sheet and the first porous sheet overlappingly wound up by the third core, winding up the first porous sheet by the second core, and winding up the base material sheet by the first core.
B01J 47/12 - Ion-exchange processes in generalApparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
B05D 1/28 - Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
C08J 7/16 - Chemical modification with polymerisable compounds
B32B 27/06 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance
B32B 37/20 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
B01J 41/07 - Processes using organic exchangers in the weakly basic form
B01J 41/14 - Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
C08F 255/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms
C08F 259/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group on to polymers containing chlorine on to polymers of vinyl chloride
C08F 259/08 - Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group on to polymers containing fluorine
C08F 261/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
Provided is an electrodialysis tank in which problems caused by the retention of treatment liquids are unlikely to occur. The electrodialysis tank is provided with: an anode and a cathode; a plurality of cation exchange membranes and anion exchange membranes provided in an alternating manner between the anode and the cathode; and a concentration chamber frame and a desalination chamber frame that maintain the intervals between the cation exchange membranes and the anion exchange membranes and that include at least one space in the interior of a picture frame-like frame. The concentration chamber frame has concentration chambers inside of which a concentration treatment liquid is made to flow. The desalination chamber frame has desalination chambers inside of which a desalination treatment liquid is made to flow. The concentration chambers include an upstream concentration chamber and a downstream concentration chamber, the desalination chambers include an upstream desalination chamber and a downstream desalination chamber, concentration treatment liquid supplied to the concentration chambers is supplied from the upstream concentration chamber to the downstream concentration chamber via a bypass concentration flow path, and desalination treatment liquid supplied to the desalination chambers is supplied from the upstream desalination chamber to the downstream desalination chamber via a bypass desalination flow path.
C02F 1/469 - Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
8.
Processing method of base material sheet, manufacturing method of modified base material sheet, base material with grafted polymer chain, and ion exchange membrane
A processing method of a base material sheet includes winding out the base material sheet wound up by a first core and a first porous sheet wound up by a second core, winding up by a third core the base material sheet and the first porous sheet to be overlapped with each other, and processing the base material sheet by a first processing liquid held in the first porous sheet; and winding out the base material sheet and the first porous sheet overlappingly wound up by the third core, winding up the first porous sheet by the second core, and winding up the base material sheet by the first core.
B01J 47/12 - Ion-exchange processes in generalApparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
C08F 255/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms
B05D 1/28 - Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
B01J 41/07 - Processes using organic exchangers in the weakly basic form
B01J 41/14 - Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
B32B 27/06 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance
B32B 37/20 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
C08F 259/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group on to polymers containing chlorine on to polymers of vinyl chloride
C08F 259/08 - Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group on to polymers containing fluorine
C08F 261/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
9.
HUMIDIFICATION MODULE AND METHOD FOR HUMIDIFICATION OF FLUID USING SAID HUMIDIFICATION MODULE
Provided are a humidification module that makes use of a hollow fiber membrane that can sufficiently exhibit functions even in an atmosphere with a high humidity and with which buckling does not easily occur, and a method for humidification of a fluid using that humidification module. The humidification module has a casing and a plurality of hollow fiber membranes accommodated in the casing, and is characterized in that the outer periphery of the hollow fiber membranes is covered with a braided yarn that is braided in a mesh form, the material for the hollow fiber membranes is a fluorine-containing resin that has ion exchange groups, and the braided yarn is formed from a material with a lower moisture content than the hollow fiber membranes.
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01D 63/00 - Apparatus in general for separation processes using semi-permeable membranes
PROCESSING METHOD OF BASE MATERIAL SHEET, MANUFACTURING METHOD OF MODIFIED BASE MATERIAL SHEET, BASE MATERIAL WITH GRAFTED POLYMER CHAIN, AND ION EXCHANGE MEMBRANE
A treatment method for a base material sheet. According to the treatment method, a base material sheet that has been wound onto a first core and a porous body sheet that has been wound onto a second core are wound out and overlappingly wound onto a third core, a treatment liquid for the base material sheet that is held by the porous body sheet is supplied to the base material sheet, the base material sheet and the porous body sheet that have been overlappingly wound onto the third core are wound out, the porous body sheet is wound onto the second core, and the base material sheet is wound onto the first core.
C08J 7/16 - Chemical modification with polymerisable compounds
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
B05D 1/28 - Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
TREATMENT METHOD FOR BASE MATERIAL SHEET, PRODUCTION METHOD FOR MODIFIED BASE MATERIAL SHEET, BASE MATERIAL INCLUDING GRAFT POLYMER CHAIN, AND ION EXCHANGE MEMBRANE
A treatment method for a base material sheet. According to the treatment method, a base material sheet that has been wound onto a first core and a porous body sheet that has been wound onto a second core are wound out and overlappingly wound onto a third core, a treatment liquid for the base material sheet that is held by the porous body sheet is supplied to the base material sheet, the base material sheet and the porous body sheet that have been overlappingly wound onto the third core are wound out, the porous body sheet is wound onto the second core, and the base material sheet is wound onto the first core.
C08J 7/16 - Chemical modification with polymerisable compounds
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
B05D 1/28 - Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
PROCESSING METHOD OF BASE MATERIAL SHEET, MANUFACTURING METHOD OF MODIFIED BASE MATERIAL SHEET, BASE MATERIAL WITH GRAFTED POLYMER CHAIN, AND ION EXCHANGE MEMBRANE
A processing method of a base material sheet includes winding out the base material sheet wound up by a first core and a first porous sheet wound up by a second core, winding up by a third core the base material sheet and the first porous sheet to be overlapped with each other, and processing the base material sheet by a first processing liquid held in the first porous sheet; and winding out the base material sheet and the first porous sheet overlappingly wound up by the third core, winding up the first porous sheet by the second core, and winding up the base material sheet by the first core.
B01J 47/12 - Ion-exchange processes in generalApparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
C08J 7/18 - Chemical modification with polymerisable compounds using wave energy or particle radiation
Provided is a water-vapor-permselective tube that can be designed to have a sufficiently small bending radius, and that has durability to withstand repeated bending and stretching stress. This water-vapor-permselective tube includes a fluorine-based cation exchange resin (A) having cationic exchange groups, and a fluororubber (B). The fluororubber (B) has a percentage volume change of less than 40%, measured in accordance with JIS K6258: 2003 when held for 3 days at 100°C in an aqueous solution of 20 mass% sodium hydroxide, and the ratio (B)/[(A) + (B)] of the mass of the fluororubber (B) with respect to the total amount of the fluorine-based cation exchange resin (A) and the fluororubber (B) is 15-70 mass%.
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
C08L 27/12 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogenCompositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
Provided is a method for producing a dialysis tank chamber frame which exhibits excellent sealing properties and thermal resistance, and is easy to produce, of stable quality, and inexpensive. A cut frame (1) is set on the base (not shown) of an impulse welder (30), a distributor (13) engages a connecting hole (9) and a connecting hole (11), and a net (15) is positioned so as to cover a center opening (3). Next, impulse welding is performed on welding areas (A, B) and welding areas (C, D). Then, with one pressing operation attachment of the net (15) as a spacer and attachment of the distributor (13) are performed simultaneously. Thereafter, the net welding areas are deburred and correction work is performed on defects.
Provided is a dialysis tank clamp which exhibits excellent handling properties, and is easy to produce, of stable quality, inexpensive, and lightweight. A dialysis tank clamp to be used in a dialysis tank provided with a chamber frame and exchange membrane for forming a desalinization chamber and/or a concentration chamber, and an electrode frame which sandwiches the chamber frame and the exchange membrane on the inside thereof, the dialysis tank clamp being characterized by having: a holding member having an intake port and an exit port for sending fluid to be treated to the desalinization chamber and the concentration chamber; a clamping part for clamping the holding member with a prescribed amount of clamping pressure; and a lattice structure that contacts the electrode frame, or contacts the electrode frame with a prescribed plate-shaped member interposed therebetween, and clamps the electrode frame, the chamber frame, and the exchange membrane via the clamping by the clamping part in the area of contact. The dialysis tank clamp is further characterized in that the pitch of the lattice is 10-50mm, inclusive.
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japan)
Inventor
Shouji, Nobuyoshi
Miyazaki, Kouhei
Saito, Kyouichi
Abstract
Disclosed is an anion exchange membrane having heat resistance and alkali resistance, capable of controlling occurrences of pinholes and reduction in strength even with the formation of thin membranes, and having sufficiently low membrane resistance. Also disclosed is a method for producing the same. Specifically disclosed is a method for producing an anion exchange membrane wherein, after graft polymerization by radiation graft polymerization of a monomer component containing a monomer (1) to a membrane-shaped polymer in the presence of 0.005 - 3 parts by mass of a polymerization inhibitor per 100 parts by mass of the monomer component, a compound (2) is reacted. A is a C3-8 alkylene group or the like; R1 - R3 are H, C1-6 alkyl groups or the like; and Z is Br or the like.
To provide a moisture control module which has a function to reduce or increase moisture in a gas permitted to flow in a hollow fiber and which is substantially free from air leakage and easy to produce; a process for producing such a moisture control module; and an apparatus for producing such a moisture control module. A moisture control module comprising a tubular hollow fiber 1, a braid fiber 3 plaited into a braid to cover the exterior of the hollow fiber 1, and a pipe 5 inserted in an end of the hollow fiber 1, wherein as the hollow fiber 1 and the braid fiber 3 present in a region with a prescribed length from said end have been heated at a prescribed temperature from outside, the braid fiber 3 is fused, and at the same time, the hollow fiber 1 is fixed by heat shrinkage to the pipe 5.
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B32B 37/02 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
11 - Environmental control apparatus
Goods & Services
(1) Electrolysers for use with electrodialysis, acid recovery, salt manufacturing, desalination and concentration; gas alarms; laboratory apparatus and instruments, namely, air compressors, gas generators and constant humidity incubators; experimental laboratory machines and apparatus, namely, air compressors, gas generators and constant humidity incubators; measuring or testing machines and instruments, namely, gasometers, hygrometers, air compressors, air cylinders, magnetic valves, fluid control elements, air micrometers, air turbines, air motors, air bearings, air-operated valves, air-operated pumps, vacuum pumps, welding machines, automatic bottle cleaning machines, solenoid valves, fluid dispensers, paste/adhesive/sealant dispensers, air monitors; medical machines and apparatus, namely, sphygmomanometers, blood testing apparatus, namely, driving air dehumidifiers, anaesthetic inhalers, therapeutic inhalers, oxygen inhalers, pneumothorax apparatus, namely, valves, syringes and chest tubes for re-inflating a collapsed lung, infusers for administering drugs to patients, massage apparatus, namely, air massagers, incubators for babies, dental instruments, dental drills, dental units for servicing dental and orthodontal patients, namely, patient's chairs, water/air suction hoses, operating lamps, cuspidor and assistant bars, dental stools, rotatable handpiece holders and compressors for dental instruments, supporters for medical purposes namely, medical therapy massage mattresses and compression therapy air massagers, expired gas analyzers for small animals; diagnostic apparatus and instruments namely, sphygmomanometers and blood testing apparatus, namely, driving air dehumidifiers; anaesthetic inhalers sold empty; hand-held and stationary electric sprayers used to disinfect and sterilize hospitals to prevent the spread of disease and epidemics; portable nebulizers used to medicate the human respiratory system; oxygen inhalers for therapeutic purposes sold empty; dryers used in chemical processing; heat recovery recuperators for chemical processing; steamers used in chemical processing; evaporators used in chemical processing; distillers used in chemical processing; heat exchangers used in chemical processing; industrial electric laundry dryers; industrial electric dish dryers; household electrothermic appliances, namely, humidifiers, air purifiers, dehumidifiers, futon dryers, hair dryers and evaporative coolers for windows and rooms; air conditioning apparatus for industrial purposes, namely, industrial air conditioners, industrial air dehumidifiers, industrial gas dehumidifiers, industrial air humidifiers, industrial gas humidifiers.
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
11 - Environmental control apparatus
Goods & Services
[ Electrolysers; gas alarms; laboratory apparatus and instruments, namely, air-gas producers and constant humidity incubators; laboratory experimental machines and apparatus, namely, air-gas producers and constant humidity incubators; measuring or testing machines and instruments, namely, gasometers, hygrometers, automatic pressure control machines and instruments, and automatic vacuum control machines and instruments; expired gas analyzers used for scientific purposes when euthanizing small animals ] [ Medical machines and apparatus, namely, sphygmomanometers, blood testing apparatus, anesthetic inhalers, therapeutic inhalers, oxygen inhalators for medical purposes sold empty; pneumothorax apparatus for reinflating a collapsed lung, infusion apparatus for administering drugs, massage apparatus; incubators for babies, filling instruments for dental purposes; dental drills, dental units for servicing dental and orthodontal patients, comprised of patient's chairs, water/air suction hoses, operating lamps, cuspidor and assistant bars, dental stools, rotatable handpiece holders and compressors for dental instruments; supporters for medical purposes; diagnostic apparatus and instruments, namely, sphygmomanometers and blood testing apparatus; anesthetic inhalers sold empty; sprayers for medical purposes; oxygen inhalators for medical purposes sold empty; dental machines and apparatus, namely, filling instruments, dental drills, and dental units for servicing dental and orthodontal patients, comprised of patient's chairs, water/air suction hoses, operating lamps, cuspidor and assistant bars, dental stools, rotatable handpiece holders and compressors for dental instruments; auxiliary medical devices and orthodontic apparatus, namely, supporters for medical purposes ] Drying apparatus for chemical processing; [ recuperators for chemical processing for heat recovery; steamers for chemical processing; evaporators for chemical processing; ] [ distillers for chemical processing; ] [ heat exchangers for chemical processing; ] air-conditioning apparatus; [ electric laundry dryers for industrial purposes; industrial electric dish dryers; household electrothermic appliances, namely, humidifiers for household purposes, air purifiers for household purposes, dehumidifiers for household purposes; futon driers for household purposes, hair dryers for household purposes, and electric space cooling apparatus for household purposes; ] industrial dryers for the removal of water vapor from compressed air and gases; industrial humidifiers; industrial dehumidifiers
20.
OH- CONDUCTOR AND PROCESS FOR PRODUCING THE OH- CONDUCTOR
Disclosed is a novel OH- conductor comprising an anion exchange polymer. The anion exchange polymer comprises at least unfreezable water among free water, bound water, and unfreezable water. The content of the free water is in the range of not more than 5 mol per mol of the functional group, the content of the bound water is in the range of not more than 1 mol per mol of the functional group, and the content of the unfreezable water is in the range of 0.1 to 10 mol per mol of the functional group. The OH- conductor comprises an anion exchange polymer filled into pores in a porous body. The anion exchange polymer preferably comprises an amidated polysulfone. The porous body preferably is formed of a porous film of a heat resistant crosslinked polyethylene. The ion conductivity of the OH- conductor is preferably in the range of not less than 0.0001 S/cm.
H01B 1/06 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of other non-metallic substances
For solving the problems of reduction of coating resin accompanying the advance of electrodeposition coating treatment and, as a consequence thereof, pinhole occurrence and coating film re-dissolution attributed to an increase of electrolyte concentration, it is intended to avoid any increase of part count and enlargement of hollow electrode with film having a diaphragm, such as an ion exchange membrane, assembled therein. In order to realize the above, diaphragm (20), such as an ion exchange membrane, is fitted on the external surface of, as a support, electrode main body (10) produced by working a conductive material into a hollow form soas to realize a structure allowing free passage of liquid between the inside and outside thereof.
