Title:
METHOD FOR PRODUCING HEXAFLUORO-1,3-BUTADIENE
Document Type and Number:
WIPO Patent Application WO/2019/244612
Kind Code:
A1
Abstract:
A method for producing hexafluoro-1,3-butadiene is provided by which hexafluoro-1,3-butadiene can be produced in a yield on an industrially sufficient level. In a liquid reaction mixture comprising a halogenated butane represented by the chemical formula CF2X1-CFX2-CFX3-CF2X4 (where X1, X2, X3, and X4 each independently represent an atom of a halogen other than fluorine), zinc, and an organic solvent, a reaction is conducted to eliminate the non-fluorine halogen atoms X1, X2, X3, and X4 from the halogenated butane, thereby yielding hexafluoro-1,3-butadiene. During this reaction, the concentration in the liquid reaction mixture of the zinc halide which has been yielded by the reaction is kept being not higher than the solubility of the zinc halide in the organic solvent.
Inventors:
FUKUCHI YOHSUKE (JP)
OGURO SHINYA (JP)
INOUE NOZOMI (JP)
OGURO SHINYA (JP)
INOUE NOZOMI (JP)
Application Number:
PCT/JP2019/022045
Publication Date:
December 26, 2019
Filing Date:
June 03, 2019
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C07C17/23; C07C21/20; C07B61/00
Domestic Patent References:
| WO2018216426A1 | 2018-11-29 | |||
| WO2005023734A1 | 2005-03-17 |
Foreign References:
| JPS6226240A | 1987-02-04 | |||
| JP2001192347A | 2001-07-17 | |||
| JP5005681B2 | 2012-08-22 | |||
| JPS505681B1 | 1975-03-06 |
Other References:
HASZELDINE, R N: "Fluoro-olefins. Part I. The sysnthesis of hexafluorobuta-1, 3-diene", JOURNAL OF THE CHEMICAL SOCIETY, November 1952 (1952-11-01), pages 4423 - 4431, XP055708944, DOI: 10.1039/jr9520004423
See also references of EP 3812357A4
See also references of EP 3812357A4
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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