Trichloro-l,2,2-trifluoroethane CFC

Chlorofluorocarbon (CFC) replacements have recently been used for their lower stability and because they have carbon-hydrogen bonds, which means that their atmospheric lifetime is expected to be much shorter than those of CFCs. The adsorption properties of l,l,2-trichloro-l,2,2-trifluoroethane (CFC 113) and its replacement compounds, l,l-dichloro-2,2,2-trifluoroethane (HCFC123), 1,1-dichloro-l-fluoroethane (HCFC141b), and l,l-dichloro-l,2,2,3,3-pentafluoropropane (HCFC225ca) on four kinds of activated carbons were investigated. The adsorption isotherms of inhalational anesthetics (halothane, chloroform, enflurane, isoflurane, and methoxyflurane) on the activated carbon were measured to evaluate the action mechanism of inhalational anesthesia. The anesthesia of CFC replacements can be estimated by the Freundlich constant N of the adsorption isotherms (Tanada et al., 1997). 

Edison [24] disclosed the conversion of CFCs to HCFCs, HFCs, and FCs using a divided cell with a Hg pool cathode in ethanol (60 vol.%)-water containing potassium acetate. In one example, the conversion of 1,1,2-trichloro-l,2,2-trifluoroethane (CFC 113) to chlorotrifluoroethene (CTFE), an industrial monomer, at 20 mA after passing a total charge of 18,700 C was 64 mol%. The cathodic reaction is ... 

Takita, Y., Yamada, H., Hashira, M. and Ishihara, T. (1990) Conversion of l,l,2-Trichloro-l,2,2-trifluoroethane (CFC 113) over TiC -supported metal and metal oxide catalysts. Chem. Lett. 715-718. 

Isomerization/hydrofluorination of l,l,2-trichloro-l,2,2-trifluoroethane (CFC-113) to 1,1-dichloro-l,2,2,2-tetrafluoroethane (CFC-114a), followed by hydrodechlorination of the latter. 

The halogenated hydrocarbons known as chlorofluorocarbons are a second class of materials that comprise water-repellent coatings. In particular, the substance known as l,l,2-trichloro-l,2,2-trifluoroethane or CFC-113 (Fig. 7.5.2) is... 

Catalytic amounts of antimony(V) chloride (3 — 5%) enchance the fluorinating activity of chlorine monofluoride. In the presence of antimony(V) chloride, chlorine monofluoride reacts with CFC-113 (l,l,2-trichloro-l,2,2-trifluoroethane) at — 40 to — 60 C to give CFC-114 (1,2-dichloro-1,1,2,2-tetrafluoroethane).107... 

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