No.5（2002）12.Effect of solvent alcohol on degradation of chlorinated hydrocarbons by γ-irradiation

Seiko NAKAGAWA

1,1,2-Trichloro-trifluoroethane(CFC113) was dissolved in alkaline 1-butanol, 2-butanol, iso-butyl alcohol, and phenyl ethyl alcohol and irradiated with ⁶⁰Co gamma rays after being purged with pure nitrogen gas. In all these solvents, the concentration of CFC113 and hydroxide ion decreased and that of chloride ion increased with a dose observed in 2-propanol solution. The reaction efficiency increases in the following order : 1-butanol < iso-butyl alcohol < phenyl ethyl alcohol < 2-butanol < 2-propanol. The solvent effect will depend on the binding energy of the αC-H of the alcohol molecule and electron affinity and dipole moment of the ketones or aldehydes produced from the alcohols.

Keywords
Degradation, CFC113, Alkaline alcohol, Gamma irradiation, G-value, Solvent effect, Electron affinity, Binding energy

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