FLUORINE GAS PRODUCTION METHOD AND FLUORINE GAS PRODUCTION APPARATUS

Title:

FLUORINE GAS PRODUCTION METHOD AND FLUORINE GAS PRODUCTION APPARATUS

Document Type and Number:

WIPO Patent Application WO/2021/131579

Kind Code:

A1

Abstract:

Provided is a fluorine gas production method whereby it becomes possible to prevent the clogging of a pipe or a valve by mists. A fluorine gas is produced by a method comprising: an electrolysis step of carrying out the electrolysis of an electrolyte solution in an electrolysis tank; a water concentration measurement step of measuring the water concentration in the electrolyte solution at a time point of the electrolysis; and a gas feeding step of feeding a fluid generated in the electrolysis tank upon the electrolysis of the electrolyte solution from the inside of the electrolysis tank to the outside of the electrolysis tank through a flow passage. In the gas feeding step, a flow passage through which the fluid is to be flown is switched to another one depending on the water concentration in the electrolyte solution which is measured in the water concentration measurement step, in such a manner that the fluid is fed to a first flow passage through which the fluid can be fed from the inside of the electrolysis tank to a first outside zone when the water concentration in the electrolyte solution which is measured in the water concentration measurement step is equal to or less than a preset reference value, while the fluid is fed to a second flow passage through which the fluid can be fed from the inside of the electrolysis tank to a second outside zone when the water concentration is larger than the preset reference value. The preset reference value is a numerical value falling within the range of 0.1 to 0.8% by mass inclusive.

More Like This:

WO/2002/090620	METHOD FOR PREPARING NITROGEN TRIFLUORIDE NF¿3? BY ELECTROLYSIS AND INSTALLATION THEREFOR
JPS6017832	[Title of the Invention] An electrolysis method of a bromine compound
JPH0551778	PRODUCTION OF GASEOUS NITROGEN TRIFLUORIDE

Inventors:

OGURO SHINYA (JP)
FUKUCHI YOHSUKE (JP)
KOBAYASHI HIROSHI (JP)

Application Number:

PCT/JP2020/045093

Publication Date:

July 01, 2021

Filing Date:

December 03, 2020

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Assignee:

SHOWA DENKO KK (JP)

International Classes:

C25B1/24; C25B9/00

Foreign References:

JP2011225922A	2011-11-10
JP2011038145A	2011-02-24
JP5919824B2	2016-05-18
JP2013507629A	2013-03-04
JPH02263988A	1990-10-26

Attorney, Agent or Firm:

TANAKA Hidetetsu et al. (JP)

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