公开(公告)号：US12152308B2

公开(公告)日：2024-11-26

申请号：US17613865

申请日：2020-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi Mikami ,  Yohsuke Fukuchi ,  Hiroshi Kobayashi

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

Abstract: A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the average particle size of a mist contained in a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, and sending the fluid 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 average particle size of the mist measured in the measuring the average particle size, such that the fluid is sent to a first flow path when the average particle size of the mist measured in the measuring the average particle size is not more than a predetermined reference value, or the fluid is sent to a second flow path when the average particle size is more than the predetermined reference value.

公开(公告)号：US12188135B2

公开(公告)日：2025-01-07

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 ,  C25B9/19 ,  C25B9/65 ,  C25B9/67 ,  C25B11/02 ,  C25B11/046 ,  C25B13/00

Abstract: A fluorine gas production device includes an electrolytic cell, a partition wall extending downward in the vertical direction from the ceiling surface inside the electrolytic cell to partition the electrolytic cell into an anode chamber and a cathode chamber, an anode, and a cathode. The lower end of the partition wall is immersed in the electrolytic solution and a length in the vertical direction of a portion immersed in the electrolytic solution of the partition wall is from 10% to 30% of the distance from the bottom surface inside the electrolytic cell to the liquid level of the electrolytic solution. The cathode is completely immersed in the electrolytic solution and the upper end of the cathode is arranged at a lower position in the vertical direction relative to the lower end of the partition wall. The anode is partially exposed from the liquid level of the electrolytic solution.

公开(公告)号：US11034636B2

公开(公告)日：2021-06-15

申请号：US16962549

申请日：2018-12-25

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke Fukuchi ,  Tomokazu Sugawara ,  Shinya Oguro ,  Hiroshi Kobayashi

IPC: C07C17/361 ,  C07C17/367 ,  C07C19/08

Abstract: A method for producing tetrafluoromethane as follows is unlikely to damage a reaction apparatus and can produce tetrafluoromethane safely, inexpensively, and stably. To a raw material liquid containing a fluorinated hydrocarbon represented by chemical formula CpHqClrFs (wherein 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, fluorine gas is introduced, and concurrently a reaction inducer is introduced in a gas state, giving tetrafluoromethane. The reaction inducer is reacted with fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas and is at least one reaction inducer selected from a hydrocarbon gaseous at normal temperature and pressure and hydrogen gas.

公开(公告)号：US12163235B2

公开(公告)日：2024-12-10

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 ,  C25B9/00 ,  C25B9/09 ,  C25B15/023 ,  C25B15/08 ,  G01N15/02 ,  G01N15/0205

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：US12098468B2

公开(公告)日：2024-09-24

申请号：US17595713

申请日：2020-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi Mikami ,  Yohsuke Fukuchi ,  Hiroshi Kobayashi

IPC: C25B1/24 ,  C25B1/245 ,  C25B11/043 ,  C25B15/023

CPC classification number: 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：US11220471B2

公开(公告)日：2022-01-11

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 ,  C07C17/20 ,  C07C17/361 ,  C07C19/08

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：US11492712B2

公开(公告)日：2022-11-08

申请号：US16624938

申请日：2018-06-26

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke Fukuchi ,  Nozomi Inoue ,  Hiroshi Kobayashi

IPC: C25B9/63 ,  C25B9/17 ,  C25B1/02 ,  C25B1/245 ,  C25B15/08

Abstract: An anode mounting member (16) of a fluorine electrolytic cell including: a plurality of stacked annular packings surrounding a sidewall of a cylindrical anode packing gland (14); a cylindrical exterior member (23) surrounding an outer periphery of the packings; and an annular fastening member (24) that fastens the plurality of packings and the exterior member (23) to the anode packing gland (14), wherein among the packings a first ceramic packing (17) is located at an end of the longitudinal direction on an electrolyte tank side, and a second resin packing (18) is adjacent to the first packing (17), central axes of the anode packing gland (14) and the exterior member (23) coincide, an inner diameter (17r) is 0.2 mm to 1.0 mm larger than an outer diameter (14R), and an outer diameter (17R) is 0.2 mm to 1.0 mm smaller than an inner diameter (23r).

公开(公告)号：US11192838B2

公开(公告)日：2021-12-07

申请号：US16611879

申请日：2018-04-25

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke Fukuchi ,  Atsushi Nakamura ,  Nozomi Inoue ,  Mitsuhiro Hino ,  Tomoki Sekiguchi

IPC: C07C17/23 ,  C07C17/383 ,  C07C21/18 ,  C07C21/20 ,  B01J23/06

Abstract: Provided is a method that is for producing hexafluoro-1,3-butadiene, discharges small amounts of industrial wastes, and is industrially applicable. The method for producing hexafluoro-1,3-butadiene includes a reaction step of reacting a halogenated butane represented by chemical formula, CF2X1-CFX2-CFX3-CF2X4 (X1, X2, X3, and X4 are each independently a halogen atom other than a fluorine atom) in an organic solvent in the presence of zinc to eliminate the halogen atoms, X1, X2, X3, and X4, other than the fluorine atoms to generate hexafluoro-1,3-butadiene, giving a reaction product containing the hexafluoro-1,3-butadiene, and an aftertreatment step of separating the hexafluoro-1,3-butadiene from the reaction product produced in the reaction step, then adding water to a reaction product residue after the separating, and removing the organic solvent, giving an aqueous solution of zinc halide.

公开(公告)号：US11192836B2

公开(公告)日：2021-12-07

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.

公开(公告)号：US11168043B2

公开(公告)日：2021-11-09

申请号：US16981814

申请日：2019-03-01

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi Mikami ,  Yohsuke Fukuchi ,  Shinya Oguro ,  Hiroshi Kobayashi

IPC: C07C17/013 ,  C07C17/04 ,  C07C19/01 ,  B01J19/26 ,  B01J4/00 ,  B01J19/24 ,  B01J10/00

Abstract: Provided are a method and an apparatus for producing 1,2,3,4-tetrachlorobutane that are unlikely to lose 3,4-dichloro-1-butene as the material or 1,2,3,4-tetrachlorobutane as the product and can be stably and economically produce 1,2,3,4-tetrachlorobutane. A reaction liquid (1) containing 3,4-dichloro-1-butene is placed in a reaction container (11), then chlorine gas is supplied to a gas phase (2) in the reaction container (11), and the 3,4-dichloro-1-butene is reacted with the chlorine gas to give 1,2,3,4-tetrachlorobutane.