公开(公告)号：US20220235471A1

公开(公告)日：2022-07-28

申请号：US17615485

申请日：2020-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi MIKAMI ,  Yohsuke FUKUCHI ,  Nozomi KUSUMOTO

IPC: C25B1/245 ,  C25B15/023 ,  C25B15/08 ,  C25B11/043 ,  C25B9/17

Abstract: A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring an electric energy accumulated after the electrolyte is placed in the electrolytic cell, and the electrolyzing is started, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, to the outside of the electrolytic cell through a flow path. In the sending, the flow path is switched in accordance with the electric energy measured in the measuring an electric energy, such that the fluid is sent to a first flow path that sends the fluid to a first outside when the electric energy measured in the measuring an electric energy is not less than a predetermined reference value, or the fluid is sent to a second flow path that sends the fluid to a second outside when the electric energy is less than the predetermined reference value.

公开(公告)号：US20200346997A1

公开(公告)日：2020-11-05

申请号：US16760091

申请日：2018-10-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi MIKAMI ,  Nozomi KUSUMOTO ,  Shinya OGURO ,  Yohsuke FUKUCHI

IPC: C07C17/04

Abstract: There is provided a method of producing 1,2,3,4-tetrachlorobutane capable of stably and economically producing 1,2,3,4-tetrachlorobutane. A reactant solution (1) containing 3,4-dichloro-1-butene is charged in a reaction vessel (11) having an inner surface, to be brought into contact with the reactant solution (1), made of a metal and a chlorine gas is introduced into the reactant solution (1) to perform a reaction between 3,4-dichloro-1-butene and the chlorine gas to produce 1,2,3,4-tetrachlorobutane. The reaction is performed while carrying out an operation of taking out at least a portion of the reactant solution (1) from the reaction vessel (11), filtering the reactant solution (1) thus taken out to remove a solid matter, and returning the filtered reactant solution (1) into the reaction vessel (11).

公开(公告)号：US20210395901A1

公开(公告)日：2021-12-23

申请号：US17279670

申请日：2019-10-07

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Nozomi KUSUMOTO ,  Hiroshi KOBAYASHI

IPC: C25B1/245 ,  C25B13/00 ,  C25B9/19 ,  C25B9/65 ,  C25B11/02 ,  C25B11/046

Abstract: There is provided a fluorine gas production device in which, even when an electrolytic solution containing hydrogen fluoride is electrolyzed at a high current density, a recombination reaction in the electrolytic solution and a recombination reaction in gas phase parts of an anode chamber and a cathode chamber are less likely to occur and the electrolytic solution can be electrolyzed with high current efficiency to produce fluorine gas. The fluorine gas production device includes an electrolytic cell (1), a partition wall (7) extending downward in the vertical direction from the ceiling surface inside the electrolytic cell (1) to partition the electrolytic cell (1) into an anode chamber (12) and a cathode chamber (14), an anode (3), and a cathode (5). The lower end of the partition wall (7) is immersed in the electrolytic solution (10) and a length (H) in the vertical direction of a portion immersed in the electrolytic solution (10) of the partition wall (7) is 10% or more and 30% or less of the distance from the bottom surface inside the electrolytic cell (1) to the liquid level of the electrolytic solution (10). The cathode (5) is completely immersed in the electrolytic solution (10) and the upper end of the cathode (5) is arranged at a lower position in the vertical direction relative to the lower end of the partition wall (7). The anode 3 is partially exposed from the liquid level of the electrolytic solution (10).

公开(公告)号：US20200346998A1

公开(公告)日：2020-11-05

申请号：US16770115

申请日：2018-11-07

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Shinichi YOROZUYA ,  Nozomi KUSUMOTO ,  Hiroshi KOBAYASHI

IPC: C07C17/10 ,  B01J4/02 ,  B01J10/00 ,  B01J19/00 ,  C07C67/287

Abstract: Provided is a method for producing a fluorine-containing organic compound. The method can immediately detect the occurrence of a side reaction in direct fluorination reaction using fluorine gas and can give a highly pure fluorine-containing organic compound at a high yield. A raw material liquid (1) containing a raw material organic compound having a hydrogen atom and two or more carbon atoms is reacted with fluorine gas in a reaction container (11) to replace the hydrogen atom of the raw material organic compound with a fluorine atom to give a fluorine-containing organic compound. In the reaction, tetrafluoromethane contained in a gas phase (2) in the reaction container (11) is continuously measured, and the amount of the fluorine gas supplied to the reaction container (11) is controlled depending on the measured value of the tetrafluoromethane.