公开(公告)号：US20220275523A1

公开(公告)日：2022-09-01

申请号：US17613867

申请日：2020-12-03

Applicant: SHOWA DENKO K.K.

Inventor： Shinya OGURO ,  Yohsuke FUKUCHI ,  Hiroshi KOBAYASHI

IPC: C25B1/245 ,  C25B15/023 ,  C25B15/08 ,  C25B9/17 ,  C25B11/065

Abstract: 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.

公开(公告)号：US20220228272A1

公开(公告)日：2022-07-21

申请号：US17595964

申请日：2020-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsuaki TO ,  Yohsuke FUKUCHI ,  Hiroshi KOBAYASHI

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

Abstract: A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the current efficiency of fluorine gas production 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. In the sending, the flow path in which the fluid flows is switched in accordance with the current efficiency measured in the measuring the current efficiency, such that the fluid is sent to a first flow path that sends the fluid to a first outside when the current efficiency measured in the measuring the current efficiency 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 current efficiency is less than the predetermined reference value.

公开(公告)号：US20210363078A1

公开(公告)日：2021-11-25

申请号：US16962943

申请日：2018-12-25

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Tomokazu SUGAWARA ,  Shinya OGURO ,  Hiroshi KOBAYASHI

IPC: C07C17/367

Abstract: Provided is a method for producing tetrafluoromethane, and the method is unlikely to damage a reaction apparatus and can produce tetrafluoromethane safely, inexpensively, and stably. To a raw material liquid (1) containing a reaction inducer and a fluorinated hydrocarbon represented by chemical formula CpHqClrFs (in the chemical formula, p is an integer of 3 or more and 18 or less, q is an integer of 0 or more and 3 or less, r is an integer of 0 or more and 9 or less, and s is an integer of 5 or more and 30 or less) and having no carbon-carbon unsaturated bond, fluorine gas is introduced to give tetrafluoromethane. The reaction inducer is a hydrocarbon polymer solid at normal temperature and pressure and is reacted with fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas.

公开(公告)号：US20210310138A1

公开(公告)日：2021-10-07

申请号：US17266728

申请日：2019-07-29

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Shinya OGURO ,  Hiroshi KOBAYASHI

IPC: C25B11/089 ,  C25B11/065 ,  C25B1/245 ,  C22C38/08 ,  C22C38/10

Abstract: 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.

公开(公告)号：US20210061733A1

公开(公告)日：2021-03-04

申请号：US16958272

申请日：2018-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Tomokazu SUGAWARA ,  Shinya OGURO ,  Hiroshi KOBAYASHI

IPC: C07C17/20

Abstract: Fluorine gas is introduced to a raw material liquid containing a reaction inducer and a fluorinated hydrocarbon represented by CpHqClrFs (in the formula, p is an integer of 3 to 18, q is an integer of 0 to 3, r is an integer of 0 to 9, and s is an integer of 5 to 30) and having no carbon-carbon unsaturated bond to give tetrafluoromethane. The reaction inducer is a halogen-containing carbon compound liquid at room temperature and pressure and is reacted with fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas. The reaction inducer is contained at a content of more than 0% by mass and not more than 10% by mass when the total content of the fluorinated hydrocarbon and the reaction inducer contained in the raw material liquid is 100% by mass.

公开(公告)号：US20220251716A1

公开(公告)日：2022-08-11

申请号：US17595713

申请日：2020-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi MIKAMI ,  Yohsuke FUKUCHI ,  Hiroshi KOBAYASHI

IPC: C25B1/245 ,  C25B11/043 ,  C25B15/023

Abstract: 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.

公开(公告)号：US20210292923A1

公开(公告)日：2021-09-23

申请号：US17263616

申请日：2019-07-19

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Katsumi MIKAMI ,  Hiroshi KOBAYASHI

IPC: C25B11/075 ,  C25B1/245 ,  C25B11/065 ,  C25B1/50

Abstract: There is provided an anode for electrolytic synthesis capable of electrolytically synthesizing fluorine gas or a fluorine containing compound by a simple process and at a low cost while suppressing the occurrence of an anode effect. An anode for electrolytic synthesis (3) for electrolytically synthesizing fluorine gas or a fluorine containing compound includes an anode substrate formed of a carbonaceous material and a metal coating film coating the anode substrate. Metal constituting the metal coating film is nickel.

公开(公告)号：US20220228273A1

公开(公告)日：2022-07-21

申请号：US17614801

申请日：2020-12-03

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi MIKAMI ,  Yohsuke FUKUCHI ,  Hiroshi KOBAYASHI

IPC: C25B1/245 ,  C25B15/08 ,  C25B9/00 ,  G01N15/02

Abstract: A device for producing fluorine gas has a first flow path configured to send a fluid from the inside of an electrolytic cell through a mist removal unit configured to remove mist from the fluid to a fluorine gas selection unit and a second flow path configured to send the fluid from the inside of the electrolytic cell to the fluorine gas selection unit without passing through the mist removal unit and has a flow path switching unit configured to switch a flow path through which the fluid flows depending on the average particle size of the mist measured by an average particle size measurement unit. The second flow path has a clogging suppression mechanism configured to suppress clogging of the second flow path by the mist.

公开(公告)号：US20220154353A1

公开(公告)日：2022-05-19

申请号：US17595958

申请日：2020-12-17

Applicant: SHOWA DENKO K.K.

Inventor： Shinya OGURO ,  Yohsuke FUKUCHI ,  Hiroshi KOBAYASHI

IPC: C25B1/245 ,  C25B9/00 ,  C25B15/025 ,  C25B11/043 ,  C25B15/08

Abstract: Provided is a method for producing fluorine gas, capable of suppressing clogging of pipes and valves with mist. Fluorine gas is produced by a method including electrolyzing an electrolyte in an electrolytic cell, measuring the water concentration in a fluid generated in a cathode chamber 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. In the sending, the flow path in which the fluid flows is switched in accordance with the water concentration measured in the measuring the water concentration.

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).