No.3（2000）12.Dechlorination of poly-chlorinated benzenes in alkaline alcohol

Seiko NAKAGAWA, Toshinari SHIMOKAWA

2,3,4,6-Tetrachlorophenol, 1,2,4-trichlorobenzene, and 2,4,6-trichloroanisole were dissolved in alkaline isopropyl alcohol and irradiated with 60Co gamma-rays after being purged with pure Nitrogen gas. The concentration of the hydroxide ions and parent chlorinated carbons decreased with the dose, while that of the chloride ions and chlorinated carbons with less chlorine atoms than the parent increased. Chain dechlorination proceeded in alkaline isopropyl alcohol. The G-values of the radiation-induced reaction were larger for tetrachlorophenol < trichloroanisole < trichlorobenzene. The decomposition efficiency would depend on the electron affinity of the chlorinated carbons.

Keywords
radiation-induced decomposition, chlorinated benzene, G-value, alkaline isopropyl alcohol, chain reaction

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