An electrolytic cell has a partition that covers an upper region of one electrode of an anode and a cathode in order to separate a gas generated from the anode and a gas generated from the cathode from each other. The partition has wall surfaces that are each opposite a surface of the electrode. The wall surfaces have, in lower end-side regions thereof, ribs extending in a direction that has a lateral direction component. The ribs and the partition are made of a fluororesin and are integrally formed.

A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the average particle size of a mist contained in a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, and sending the fluid from the inside to the outside of the electrolytic cell through a flow path. The flow path in which the fluid flows is switched in accordance with the average particle size of the mist measured in the measuring the average particle size, such that the fluid is sent to a first flow path when the average particle size of the mist measured in the measuring the average particle size is not more than a predetermined reference value, or the fluid is sent to a second flow path when the average particle size is more than the predetermined reference value.

A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the average particle size of a mist contained in a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, and sending the fluid from the inside to the outside of the electrolytic cell through a flow path. The flow path in which the fluid flows is switched in accordance with the average particle size of the mist measured in the measuring the average particle size, such that the fluid is sent to a first flow path when the average particle size of the mist measured in the measuring the average particle size is not more than a predetermined reference value, or the fluid is sent to a second flow path when the average particle size is more than the predetermined reference value.

A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring an intensity of sound generated near an anode in an inside of the electrolytic cell as the electrolyte is electrolyzed in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. The flow path is switched in accordance with the intensity of sound measured, such that the fluid is sent to a first flow path when the intensity of sound measured in the measuring an intensity of sound is not more than a predetermined reference value, or the fluid is sent to a second flow path when the intensity of sound measured in the measuring an intensity of sound is more than the predetermined reference value.

A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring an intensity of sound generated near an anode in an inside of the electrolytic cell as the electrolyte is electrolyzed in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. The flow path is switched in accordance with the intensity of sound measured, such that the fluid is sent to a first flow path when the intensity of sound measured in the measuring an intensity of sound is not more than a predetermined reference value, or the fluid is sent to a second flow path when the intensity of sound measured in the measuring an intensity of sound is more than the predetermined reference value.

A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the water concentration in the electrolyte in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. The flow path in which the fluid flows is switched in accordance with the water concentration in the electrolyte measured in the measuring the water concentration, such that the fluid is sent to a first flow path when the water concentration in the electrolyte measured in the measuring the water concentration is not more than a predetermined reference value, or the fluid is sent to a second flow path when the water concentration is more than the predetermined reference value.

A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the water concentration in the electrolyte in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. The flow path in which the fluid flows is switched in accordance with the water concentration in the electrolyte measured in the measuring the water concentration, such that the fluid is sent to a first flow path when the water concentration in the electrolyte measured in the measuring the water concentration is not more than a predetermined reference value, or the fluid is sent to a second flow path when the water concentration is more than the predetermined reference value.

An anode mounting member (16) of a fluorine electrolytic cell including: a plurality of stacked annular packings surrounding a sidewall of a cylindrical anode packing gland (14); a cylindrical exterior member (23) surrounding an outer periphery of the packings; and an annular fastening member (24) that fastens the plurality of packings and the exterior member (23) to the anode packing gland (14), wherein among the packings a first ceramic packing (17) is located at an end of the longitudinal direction on an electrolyte tank side, and a second resin packing (18) is adjacent to the first packing (17), central axes of the anode packing gland (14) and the exterior member (23) coincide, an inner diameter (17r) is 0.2 mm to 1.0 mm larger than an outer diameter (14R), and an outer diameter (17R) is 0.2 mm to 1.0 mm smaller than an inner diameter (23r).

An anode mounting member (16) of a fluorine electrolytic cell including: a plurality of stacked annular packings surrounding a sidewall of a cylindrical anode packing gland (14); a cylindrical exterior member (23) surrounding an outer periphery of the packings; and an annular fastening member (24) that fastens the plurality of packings and the exterior member (23) to the anode packing gland (14), wherein among the packings a first ceramic packing (17) is located at an end of the longitudinal direction on an electrolyte tank side, and a second resin packing (18) is adjacent to the first packing (17), central axes of the anode packing gland (14) and the exterior member (23) coincide, an inner diameter (17r) is 0.2 mm to 1.0 mm larger than an outer diameter (14R), and an outer diameter (17R) is 0.2 mm to 1.0 mm smaller than an inner diameter (23r).

An anode for electrolytic synthesis (3) for electrolytically synthesizing fluorine gas. The anode includes an anode substrate (31) formed of a metallic material and a carbonaceous layer (33) formed of a carbonaceous material and arranged on the surface of the anode substrate (31). The metallic material is an iron-based alloy containing iron and nickel. Also disclosed is a method for producing fluorine gas using the anode for electrolytic synthesis.