Showa Denko K.k.

Nozomi Inoue

Hiroshi Kobayashi

Yohsuke Fukuchi

Hiroshi Ikeda

Shinya Oguro

Tomoki Sekiguchi

Mitsuhiro Hino

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

Anode mounting member of fluorine electrolytic cell, fluorine electrolytic cell, and method for producing fluorine gas

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, CFX-CFX-CFX-CFX(X, X, X, and Xare each independently a halogen atom other than a fluorine atom) in an organic solvent in the presence of zinc to eliminate the halogen atoms, X, X, X, and X, 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.

Production method for hexafluoro-1,3-butadiene

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, CFX&#x2014;CFX&#x2014;CFX&#x2014;CFX(X, X, X, and Xare 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, X, X, X, and X, 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.

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Tokyo, Japan

Nozomi Inoue