306-83-2Relevant articles and documents
Selective hydrogenolysis of CFC-113a by Group VIII transition metal complexes
Cho, Ook-Jae,Lee, Ik-Mo,Park, Kun-You,Kim, Hoon-Sik
, p. 107 - 110 (1995)
Highly efficient and selective hydrogenolysis of CFC-113a (CF3CCl3) to produce HCFC-123 (CF3CHCl2) has been achieved through the use of Group VIII transition metal complexes.The catalytic activity observed was sensitive to solvents and to the structure of the metal complexes. - Keywords: Selective hydrogenolysis; CFC-113a; Group VIII transition metal complexes; Catalysis; Selectivity
Dmowski,Kolinski
, p. 210 (1972)
Transfer hydrogenolysis of CFC-113a with aldehydes and metallic Fe or Ni
Seo, Sang Hyun,Hong, Seung-Pyo,Kwag, Chong-Yun,Lee, Hyun-Joo,Kim, Hoonsik,Lee, Ik-Mo
, p. 73 - 78 (1999)
Highly selective transfer hydrogenolysis of CFC-113a (CF3CCl3) to HCFC-123 (CF3CHCl2) was accomplished in the presence of metal powder (Fe or Ni) in THF at 90°C under 8 atm of He. Pressure effects on the catalytic activities depend on the nature of metal catalysts and this behavior can be explained by a different rate determining step in each system. Activation of the C-H bond of THF on metal powder aided by η2 coordinated aldehydes is believed to occur first to produce electron-rich metal hydrides, which enhance the activation of the C-Cl bond of CFC-113a. Then reductive elimination follows to produce HCFC-123. This series of reactions was supported by experiments using deuterated THF and/or DMF and with p-substituted benzaldehydes.
Manufacturing method of HCFC-123 and/or HCFC-122
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Paragraph 0139-0141, (2019/12/25)
The present invention relates to a method for producing HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane) and/or HCFC-122 (1,1,2-trichloro-2,2-difluoroethane), wherein at least one reaction step is performed in a microreactor. In particular, a preferred embodiment of the present invention relates to a method for producing HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane) and/or HCFC-122 (1,1,2-trichloro-2,2-difluoroethane), wherein at least one reaction step is performed in a microreactor composed of or made of SiC ("SiC microreactor") or in a microreactor composed of or made of alloy (such as Hastelloy C). In one embodiment, the method for producing HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane) and/or HCFC-122 (1,1,2-trichloro-2,2-difluoroethane) can be effectively combined, because the HCFC-122(1,1,2-trichloro-2,2-difluoroethane) produced by the method according to the present invention using a microreactor, preferably a SiC microreactor, can be preferably and advantageously used as a raw material and/or intermediate material for the production of the HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane), and preferably also used for manufacturing the HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane) in a microreactor. During the manufacturing of the HCFC-123 and/or the HCFC-122, the HCFC-123 and/or the HCFC-122 can be easily purified and/or separated by using only a low energy consumption method, and the method for performing purification and/or separation preferably requires no distillation. Advantageously, the the HCFC-123 and/or the HCFC-122 can be easily separated from the excess HF and a catalyst in an energy-saving manner by phase separation.
Method for combined production of 1,1,2-trifluorotrichloroethane and 1,1,1-trifluorodichloroethane
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Paragraph 0036; 0037, (2017/01/12)
The invention discloses a method for combined production of 1,1,2-trifluorotrichloroethane and 1,1,1-trifluorodichloroethane. The method comprises the following steps: adding reaction raw materials comprising hydrofluoric acid, hexachloroethane and tetrachloroethylene into a reaction autoclave according to a molar ratio of (10-40):(0.8-2.5):(1.2-3.6), reacting, adding a catalyst for catalysis, reacting at 30-250DEG C under 0.3-3.0Mpa for 2-12h, washing with water, washing with an alkali, and carrying out rectifying purification to obtain the products 1,1,2-trifluorotrichloroethane and 1,1,1-trifluorodichloroethane, wherein the catalyst can be metal fluoride or metal chloride, the metal fluoride comprises AlF3, SbF3, SbF5 and ZnF2, and the metal chloride comprises SbCl5. The synthetic method has the advantages of abundant sources and low price of the raw materials, high reaction yield, easy reaction feeding, easy separation and extraction of the generated products, and realization of industrial continuous production.
PROCESS FOR PRODUCING FLUOROETHANE
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Paragraph 0048, (2015/12/04)
Fluorochromium oxide having a fluorine content of not less than 30 wt.% is used for the fluorination reaction. To provide a manufacturing method for fluorine-containing ethane which contains 1, 1, 1, 2, 2-pentafluoroethane as the main component in which the reaction can be performed while controlling the generation of CFCs to the greatest possible extent by fluorinating at least one selected from the group composed of tetrachloroethylene, 2, 2-dichloro-1, 1, 1-trifluoroethane and 2-chloro-1, 1, 1, 2-tetrafluoroethane with hydrogen fluoride.