- METHOD FOR PRODUCING 1,1,2-TRIFLUOROETHANE (HFC-143)
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The present disclosure provides a method for producing HFC-143 that is not expensive, and that is more efficient than conventional methods. Specifically, the present disclosure provides a method for producing 1,1,2-trifluoroethane (HFC-143) that includes contacting at least one chlorine-containing compound selected from the group consisting of 1,1,2-trichloroethane (HCC-140), 1,2-dichloro-1-fluoroethane (HCFC-141), 1,1-dichloro-2-fluoroethane (HCFC-141a), (E,Z)-1,2-dichloroethylene (HCO-1130 (E,Z)), and (E,Z)-1-chloro-2-fluoroethylene (HCFO-1131 (E,Z)) with hydrogen fluoride to perform one or more fluorination reactions, thereby obtaining a reaction gas containing HFC-143, hydrogen chloride, and hydrogen fluoride.
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Paragraph 0052-0072
(2021/07/31)
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- FLUOROETHANE PRODUCTION METHOD AND FLUOROOLEFIN PRODUCTION METHOD
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The production method according to the present disclosure comprises obtaining a product comprising a fluoroethane from a fluoroethylene by a reaction in the presence of at least one catalyst. The reaction is performed in two or more reaction zones. Each reaction zone comprises a catalyst, and the fluoroethylene is supplied to each reaction zone to perform the reaction.
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Paragraph 0101-0103
(2021/10/11)
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- PRODUCTION METHOD FOR FLUORO-ETHANE AND PRODUCTION METHOD FOR FLUORO-OLEFIN
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The production method according to the present disclosure comprises obtaining a product containing the fluoroethane from a fluoroethylene by a reaction in the presence of catalysts. Each catalyst is formed by supporting a noble metal on a carrier. A reactor for performing the reaction is filled with a catalyst having a noble metal concentration of C1 mass % based on the entire catalyst and a catalyst having a noble metal concentration of C2 mass % based on the entire catalyst to form an upstream portion and a downstream portion, respectively; and C1C2. The reaction is performed by bringing the fluoroethylene represented by formula (3) and hydrogen gas into contact with the upstream portion and the downstream portion in this order.
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Paragraph 0086
(2021/10/15)
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- METHOD FOR PRODUCING 1,1,2-TRIFLUOROETHANE (HFC-143)
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The present disclosure provides a method for producing HFC-143 at low cost and more efficiently than when using conventional methods. Specifically, the present disclosure provides a method for producing 1,1,2-trifluoroethane (HFC-143), comprising performing one or more fluorination reactions by bringing at least one chlorine-containing compound selected from the group consisting of 2-chloro-1,1-difluoroethane (HCFC-142) and 1-chloro-1,2-difluoroethane (HCFC-142a) into contact with hydrogen fluoride to obtain a reaction gas containing HFC-143, hydrogen chloride, and hydrogen fluoride.
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- Method for synthesizing 1,2-difluoroethane and 1,1,2-trifluoroethane
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The invention relates to a method for synthesizing 1,2-difluoroethane and 1,1,2-trifluoroethane, belonging to the field of organic chemical synthesis. The method for synthesizing 1,2-difluoroethane and 1,1,2-trifluoroethane is characterized in that ethylene (with a molecular formula of CH2=CH2) and chlorine (with a molecular formula of Cl2) are heated under the action of a catalyst to generate a mixture of 1,2-dichloroethane and 1,1,2-trichloroethane, and the mixture and hydrogen fluoride (with a molecular formula HF) are heated under the action of a fluorination catalyst to generate 1,2-difluoroethane and 1,1,2-trifluoroethane. According to the method, raw materials are low in process and convenient to obtain; product separation and purification are simple; industrial production is easy;and industrial three-waste generation amount is low.
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Paragraph 0020; 0022; 0024-0036; 0037; 0042-0049
(2020/05/30)
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- METHOD FOR PRODUCING 1-CHLORO-1,2-DIFLUOROETHYLENE
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The present invention provides a method for efficiently producing 1-chloro-1,2-difluoroethylene at low cost. Specifically, the present invention provides a method for producing 1-chloro-1,2-difluoroethylene, including the step of dehydrohalogenating chlorofluoroethane represented by formula (1) CFClX1—CHFX2 wherein X1 and X2 are different from each other and represent H, F, or Cl; and either X1 or X2 is H.
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Paragraph 0114
(2019/06/17)
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- Gas-phase fluorination of fluoroethanes with elemental fluorine
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Scientific basis for industrial gas-phase fluorination of fluoroethanes with elemental fluorine allowing production of higher-fluorinated fluoroethanes from lower-fluorinated compounds is developed. 2001 MAIK "Nauka/Interperiodica".
- Pashkevich,Mukhortov,Alekseev,Asovich,Rozhdestvenskaya
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p. 1151 - 1155
(2007/10/03)
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- vic-difluorination of fluoroalkenes with xenon difiuoride: The effect of fluorine substituents on the reaction of alkenes with xenon difluoride
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vic-Difluorination proceeds by the reaction of fluoroalkenes with xenon difluoride to afford the corresponding fluorinated compounds. From the reaction with polyfluoroalkenes, the products are obtained in high to excellent yields. In this reaction, the fluorine atom substituent of alkene stabilizes the cation intermediate and suppresses side-reactions such as rearrangement.
- Tamura, Masanori,Quan, Heng-Dao,Sekiya, Akira
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p. 3151 - 3153
(2007/10/03)
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- FLUORINATION OF HYDROCARBONS BY THE HIGHER FLUORIDES OF COBALT, MANGANESE, AND CERIUM
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The fundamental possibility of producing partly fluorinated methanes, ethane, and propanes on an industrial scale was demonstrated with the higher fluorides of variable-valence metals as fluorinating agents.
- Asovich, V. S.,Kornilov, V. V.,Kostyaev, R. A.,Mel'nichenko, B. A.,Maruev, A. V.,Maksimov, B. N.
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p. 1284 - 1287
(2007/10/02)
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- DESORPTION OF REACTION PRODUCTS IN FLUORINATION OF ETHYLENE WITH COBALT TRIFLUORIDE
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Some macrokinetic relationships of ethylene fluorination with cobalt trifluoride have been investigated.Dependences of the degree of ethylene conversion on time of contact and temperature in reactors of batch and continuous operation have been studied.
- Kostyaev, R. A.,Pashkevich, D. S.
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p. 1426 - 1429
(2007/10/03)
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- FLUORINATION OF ETHYLENE BY HIGHER FLUORIDES OF COBALT, MANGANESE, AND CERIUM
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Fluorination of ethylene by higher fluorides of metals with variable valence (CoF3, CeF4, MnF3) is studied.Temperature dependence of the contents of fluorinated products are obtained.The mechanism of formation of significant amounts of 1,1,1,2-tetrafluoroethane in the reaction involving CoF3 and oligomers in the reaction involving CeF4, is proposed.
- Asovich, V. S.,Kornilov, V. V.,Maksimov, B. N.
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- Conversion of 1,1,2-Trichloro-1,2,2-trifluoroethane (CFC113) over TiO2-Supported Metal and Metal Oxide Catalysts
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CCl2FCClF2 was converted to C2H2F2 and CH4 over Pd/TiO2 at 420-820 K in the presence of hydrogen.C2H2F2 and C2H3F3 were mainly formed over Pt/TiO2 at 520-570 K and dechlorination to CF3Cl took place over Ni/TiO2 and Co/TiO2 at 470-620 K.The CeO2/TiO2 catalyst and the catalyst containing La themselves reacted with CFC113 to give CeF3/TiO2 and LaF3/TiO2 after the reaction at 820 K, respectively.MnTiO3 catalyzed the reaction to C2F3Cl at relatively high temperatures of 770-820 K.
- Takita, Yusaku,Yamada, Hiroshi,Hashida, Masayo,Ishihara, Tatsumi
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p. 715 - 718
(2007/10/02)
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- 1,2-Migration of Fluorine Atom in CH2FCF2 Radical Produced by the Addition of a Hydrogen Atom to Trifluoroethylene
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The reaction of hydrogen atoms with trifluoroethylene has been studied at room temperature by using the mercury photosensitized decomposition of hydrogen as the source of hydrogen atoms.Product analyses using gas chromatography and 1H and 19F NMR spectroscopy confirmed the 1,2-migration of a fluorine atom in the CH2FC.F2 radical produced by the addition of a hydrogen atom to trifluoroethylene.The rate constant of the migration was estimated to be 2*1010 s-1 from the pressure dependence of the five kinds of hexafluorobutanes produced.NMR parameters for these fluorinated compounds were determined.
- Kohida, Tomoyuki,Kotaka, Masahiro,Sato, Shin,Ishida Toru,Yamamoto, Keiji,et al.
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p. 3131 - 3136
(2007/10/02)
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