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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.
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公开(公告)号：US10707509B2
公开(公告)日：2020-07-07
申请号：US15286650
申请日：2016-10-06
Applicant: SHOWA DENKO K.K.
Inventor： Toshikazu Shishikura , Hiroshi Kobayashi
Abstract: Provided in the present invention is a redox flow battery including a positive electrode, a negative electrode and a separation membrane, wherein a positive electrode electrolyte composed of an aqueous solution containing vanadium ions is supplied into a positive electrode chamber, and a negative electrode electrolyte composed of an aqueous solution containing vanadium ions is supplied into a negative electrode chamber, to carry out charging and discharging of the battery. In the redox flow battery, zirconium or titanium coated with a noble metal or a compound thereof is used as a positive electrode material, and when the positive electrode material is zirconium coated with a noble metal or a compound thereof, the positive electrode electrolyte and the negative electrode electrolyte contain sulfuric acid; and when the positive electrode material is titanium coated with a noble metal or a compound thereof, the positive electrode electrolyte contains nitric acid.
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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.
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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.
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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.
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Patent Agency Ranking
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
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).
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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.
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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
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.
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公开(公告)号：US11040931B2
公开(公告)日：2021-06-22
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: C07C17/361 , C07C17/367 , C07C19/08 , 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.
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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
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.
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