公开(公告)号：US20220234890A1

公开(公告)日：2022-07-28

申请号：US17595873

申请日：2020-08-20

Applicant: SHOWA DENKO K.K.

Inventor： Koki FUJIMURA ,  Hiroshi KOBAYASHI ,  Yohsuke FUKUCHI

IPC: C01B7/20 ,  C01B7/19 ,  C25B1/24

Abstract: A method for producing fluorine gas including a fluorination step of obtaining a reaction mixture containing a major fluorinated substance that is a target component generated by fluorination of a raw material compound and by-product hydrogen fluoride, a separation step of separating the reaction mixture to obtain a main product component containing the major fluorinated substance and a by-product component containing the by-product hydrogen fluoride, a purification step of purifying the by-product component to obtain a recovered hydrogen fluoride component in which a concentration of an organic substance is reduced and a concentration of the by-product hydrogen fluoride is increased, an electrolysis step of performing electrolysis using the recovered hydrogen fluoride component as at least a part of an electrolyte to produce fluorine gas, and an introduction step of introducing the fluorine gas obtained in the electrolysis step into a reaction field for fluorination in the fluorination step.