- PROCESS TO PRODUCE (Z)-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE AND INTERMEDIATES
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A method of producing (Z)-1,1,1,4,4,4-hexafluoro-2-butene (Z-1336mzz) is described. The method utilizes readily available halogenated starting materials, including 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) and carbon tetrachloride.
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Page/Page column 19
(2021/09/11)
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- Preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene
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The invention discloses a preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene. The method uses hexachlorobutadiene and hydrogen fluoride as raw materials and uses a chromium-based catalyst as a fluorine-chlorine exchange catalyst to form the 1,1,1,2,4,4,4-heptafluoro-2-butene under gas phase conditions through a plurality of gas-phase catalytic reactions. Compared with the prior art, the preparation method of the 1,1,1,2,4,4,4-heptafluoro-2-butene provided by the invention has the following advantages: 1, the gas phase fluorination method adopted in the method is a cycle fluorination method, has less three industrial wastes (waste water, waste gases and solid waste), and greatly reduces the production costs; 2, the method can realize rapid and multiple-cycle fluorination, improve a product yield, and have simple separation and purification of the product; and 3, the method has the advantages of cheap raw materials, convenient sources and simple operation, and is suitable for industrialized production.
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Paragraph 0027; 0028; 0229; 0030; 0031; 0036; 0041
(2019/01/07)
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- One-Step Process for Hexafluoro-2-Butene
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Disclosed is a one step process for making of 1,1,1,4,4,4-hexafluoro-2-butene. More specifically, the present invention provides a process for making hexafluoro-2-butene, continuously, from 2-chloro-3,3,3-trifluoropronene using Fe2O3/NiO impregnated carbon catalyst at 600° to 650° C.
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Paragraph 0033; 0034
(2016/02/18)
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- METHOD OF HYDRODECHLORINATION TO PRODUCE DIHYDROFLUORINATED OLEFINS
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Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkene with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkene with hydrogen to produce a fluorine-containing olefin, wherein said catalyst is a composition comprising chromium, nickel and optionally an alkali metal selected from potassium and cesium. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkenes comprising copper, nickel, and an alkali metal selected from potassium and cesium, and methods of making such catalysts.
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Page/Page column 5; 7
(2010/07/04)
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- PROCESSES FOR THE SYNTHESIS OF 3-CHLOROPERFLUORO-2-PENTENE, OCTAFLUORO-2-PENTYNE, AND 1,1,1,4,4,5,5,5-OCTAFLUORO-2-PENTENE
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Disclosed is a process comprising reacting CF3CF2CCI2CF2CF3 (CFC-41 -10mca) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CF2CCI=CFCF3 (CFC-1419myx). Also disclosed herein is a process comprising reacting CF3CF2CCI=CFCF3 (CFC- 1419myx) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CF2C≡CCF3 (octafluoro-2-pentyne). Also disclosed herein is a process comprising reacting CF3CF2CCI2CF2CF3 (CFC-41 -10mca) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CF2C≡CCF3 (octafluoro-2-pentyne). In addition, a process for reacting CF3CF2C≡CCF3, in a pressure vessel, with a Lindlar catalyst and hydrogen to produce CF3CF2CH=CHCF3 (1,1,1,4,4,5,5,5-octafluoro-2- pentene) is disclosed.
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Page/Page column 14-15
(2009/07/18)
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- A Novel Hydrodechlorinative Dimerization of Chlorofluorocarbons over Supported Ni Catalysts
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1,1,1-Trichloro-2,2,2-trifluoroethane or 1,1-dichloro-1,2,2,2-tetrafluoroethane, both of which have CF3 group, dimerizes over supported Ni catalysts at an elevated temperature (723 K) into corresponding C4-compounds in good to moderate yields.
- Tomioka, Satoshi,Mori, Tohru,Ueda, Wataru,Morikawa, Yutaka,Ikawa, Tsuneo
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p. 1825 - 1826
(2007/10/02)
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- LASER-POWERED HOMOGENEOUS DECOMPOSITION OF 1-BROMO-1-CHLORO-2,2,2-TRIFLUOROETHANE
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CW CO2 photosensitized (SF6) homogeneous decomposition of 1-bromo-1-chloro-2,2,2-trifluoroethane yields various halobutenes and haloethanes.The former are suggested to arise from a sequence of C-Br cleavage, radical recombinations to halobutanes and conse
- Pola, Josef,Chvatal, Zdenek
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p. 233 - 244
(2007/10/02)
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