- PROCESSES FOR PRODUCING 2-CHLORO-1,1,1,2-TETRAFLUOROPROPANE AND 2,3,3,3-TETRAFLUOROPROPENE
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To provide processes for efficiently and economically producing 2-chloro-1,1,1,2-tetrafluoropropane (R244bb) and 2,3,3,3-tetrafluoropropene (R1234yf) in an industrially practical manner. A process for producing 2-chloro-1,1,1,2-tetrafluoropropane, which comprises a chlorination step of reacting 1,2-dichloro-2-fluoropropane and chlorine in the presence of a solvent under irradiation with light to obtain 1,1,1,2-tetrachloro-2-fluoropropane, and a fluorination step of reacting the 1,1,1,2-tetrachloro-2-fluoropropane obtained in the chlorination step and hydrogen fluoride in the presence of a catalyst to obtain 2-chloro-1,1,1,2-tetrafluoropropane, and a process for producing 2,3,3,3-tetrafluoropropene, which comprises dehydrochlorinating it in the presence of a catalyst.
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Page/Page column 5
(2011/10/12)
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- A New Preparative Method for 1-Chloro-2,2,3-trifluoropropane (HCFC-253ca)
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Allene was both fluorinated and chlorofluorinated with chlorine monofluoride serving as a well-known chlorofluorinating and chlorinating reagent. 1-Chloro-2,2,3-trifluoropropane was obtained as a major product in the presence of cesium fluoride.
- Arimura, Takashi,Kurosawa, Shigeru,Sekiya, Akira
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- REACTIONS OF HALOGEN FLUORIDES. X. FLUORINATION OF CHLORINE-SUBSTITUTED ALKANES WITH BROMINE TRIFLUORIDE
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Bromine trifluoride in Freon 113 readily substitutes the chlorine atoms in monochloroalkanes by fluorine, while in the presence of catalytic amounts of certain Lewis acids it is also capable of substituting the chlorine atoms in polychloroalkanes with the formation of the corresponding fluorides.Additions of tin tetrachloride make it possible not only to increase the reaction rate but also to increase the selectivity of fluorination.In some cases substitution of a primary chlorine atom is accompanied by hydride transfers.
- Kartashov, A. V.,Chuvatkin, N. N.,Boguslavskaya, L. S.
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p. 2276 - 2278
(2007/10/02)
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- REACTION OF ALKANES, ETHERS AND ALIPHATIC KETONES WITH THE SF4-HF-Cl2 SYSTEM
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The reaction of alkanes, ethers, and aliphatic ketones with the SF4-HF-Cl2 system takes place through formation of unsaturated compounds followed by addition of the chloride and fluoride ions.The presence of sulfur tetrafluoride in the rection mixture pro
- Muratov, N. N.,Omarov, V. O.,Kunshenko, B. V.,Burmakov, A. I.,Alekseeva, L. A.,Yagupol'skii, L. M.
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p. 1621 - 1626
(2007/10/02)
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