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Method for producing fluorine gas and apparatus for producing fluorine gas

A manufacturing method and technology of fluorine gas, applied to cells, electrolytic components, electrodes, etc., can solve problems such as continuous operation obstacles

Pending Publication Date: 2022-01-07
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mist accompanying fluorine gas may turn into powder and clog the piping and valves used for the transportation of fluorine gas
Therefore, sometimes the operation for producing fluorine gas has to be interrupted or stopped, which becomes an obstacle to continuous operation when producing fluorine gas by electrolysis.

Method used

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  • Method for producing fluorine gas and apparatus for producing fluorine gas
  • Method for producing fluorine gas and apparatus for producing fluorine gas
  • Method for producing fluorine gas and apparatus for producing fluorine gas

Examples

Experimental program
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Effect test

Embodiment

[0154] Examples and comparative examples are shown below to describe the present invention more specifically.

reference example 1

[0156] Fluorine gas is produced by electrolyzing the electrolytic solution. As the electrolytic solution, a mixed molten salt (560 L) of 434 kg of hydrogen fluoride and 630 kg of potassium fluoride was used. Amorphous carbon electrodes (30 cm in width, 45 cm in length, and 7 cm in thickness) manufactured by SGL Carbon were used as anodes, and 16 anodes were installed in the electrolytic cell. In addition, a punched plate made by Monel (trademark) was used as a cathode, and it was installed in the electrolytic cell. Two cathodes and one anode face each other, and the total area of ​​the parts facing the cathode in one anode is 1736 cm 2 .

[0157] The electrolysis temperature is controlled at 85-95°C. First, the temperature of the electrolyte is set to 85°C, and the current density is 0.036A / cm 2 A direct current of 1000 A was applied to start electrolysis. The water concentration in the electrolytic solution at this time was 1.0% by mass. In addition, the water concentra...

Embodiment 1

[0170] use figure 2 In the shown fluorine gas production apparatus, the same electrolysis as in Reference Example 1 was performed. In the electrolysis of the stage (1), the fluid generated at the anode is made to flow through the second bypass pipe, the bypass valve, and the first bypass pipe. After the electrolysis of the stage (1) was completed, the electrolysis was temporarily stopped, and the inside of the fluorine gas production apparatus was inspected. As a result, mist accumulated in the first bypass pipe, but since the diameter of the pipe was increased, clogging of the pipe did not occur.

[0171] Since it becomes the electrolysis of the stage (2) in which the average particle diameter of the mist is 0.4 μm or less (0.36 μm) of the reference value, the fluid generated at the anode is passed through the first piping, the first piping valve, the fourth piping, the first The mist is removed and circulated. Mist accumulation and clogging did not occur in the first pip...

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Abstract

Provided is a method for producing fluorine gas, wherein pipe or valve clogging caused by mist can be prevented. The fluorine gas is produced by a method comprising: an electrolysis step for performing electrolysis of an electrolytic solution in an electrolytic cell; an average particle size measurement step for measuring the average particle size of mist contained in a fluid generated inside the electrolytic cell during the electrolysis of the electrolytic solution; and an air discharging step for discharging the fluid from the inside of the electrolytic cell to the outside through a flow channel. In the air discharging step, the flow channel through which the fluid is discharged is switched according to the average particle size of the mist measured in the average particle size measurement step. When the average particle size of the mist measured in the average particle size measurement step is less than or equal to a predetermined reference value, the fluid is fed to a first flow channel through which the fluid is discharged from the inside of the electrolytic cell to a first outside, and when the average particle size of the mist measured in the average particle size measurement step is greater than the predetermined reference value, the fluid is fed to a second flow channel through which the fluid is discharged from the inside of the electrolytic cell to a second outside. The predetermined reference value is a numerical value within the range of 0.1-1.0 (mu)m.

Description

technical field [0001] The present invention relates to a method for producing fluorine gas and a device for producing fluorine gas. Background technique [0002] Fluorine gas can be synthesized by electrolyzing an electrolytic solution containing hydrogen fluoride and metal fluoride (electrolytic synthesis). The electrolysis of the electrolytic solution also generates mist (for example, mist of the electrolytic solution) together with the fluorine gas, so the mist is accompanied by the fluorine gas sent out from the electrolytic cell. The mist accompanying fluorine gas may turn into powder and clog pipes and valves used for transporting fluorine gas. Therefore, the operation for producing fluorine gas may have to be interrupted or stopped, which hinders the continuous operation when producing fluorine gas by the electrolytic method. [0003] In order to suppress clogging of pipes and valves due to mist, Patent Document 1 discloses a technique of heating fluorine gas accom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/245C25B9/00C25B15/02C25B15/08
CPCC25B1/245C25B9/00C25B15/08C25B15/02C25B11/043C25B9/17C25B15/023C25B9/60
Inventor 三神克己福地阳介小林浩
Owner RESONAC CORPORATION
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