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：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：US20210017105A1

公开(公告)日：2021-01-21

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: C07C17/04 ,  C07C19/01 ,  B01J19/26

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.

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：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：US20210040021A1

公开(公告)日：2021-02-11

申请号：US17046037

申请日：2019-06-03

Applicant: SHOWA DENKO K.K.

Inventor： Yohsuke FUKUCHI ,  Shinya OGURO ,  Nozomi INOUE

IPC: C07C17/23

Abstract: Provided is a method for producing hexafluoro-1,3-butadiene, and the method can produce hexafluoro-1,3-butadiene at an industrially sufficient level of yield. In a reaction liquid containing 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), zinc, and an organic solvent, a reaction is conducted to eliminate the halogen atoms other than a fluorine atom, X1, X2, X3, and X4, from the halogenated butane, yielding hexafluoro-1,3-butadiene. During the reaction, the concentration of a zinc halide generated by the reaction, in the reaction liquid is not more than the solubility of the zinc halide in the organic solvent.