| 摘要 |
PROBLEM TO BE SOLVED: To treat even a highly conc. polychlorinated biphenyles, in such a case that an organohalogen compd. contained in electric insulating oil, an org. waste liquid soln. or the like is dechlorinated to be subjected to decomposition treatment, by supplying a soln. to be treated to a reaction tank housing an alkali metal to decompose the organohalogen compd. SOLUTION: When a polychlorinated biphenyl as one example of an organohalogen compd. is subjected to decomposition treatment, at first, insulating oil for adjusting the concn. of a sodium dispersant and polychlorinated biphenyl-containing insulating oil are respectively distilled in distillation devices 4, 2 under vacuum to remove moisture in respective insulating oils. Next, the insulating oil distilled in the distillation device 4 under vacuum is supplied to a sodium dispersant adjusting tank 3 to adjust the concn. of the sodium dispersant and the sodium dispersant-containing insulating oil is supplied to a reaction tank 1. Subsequently, the polychlorinated biphenyl-containing insulating oil is supplied to the reaction tank 1 and the polychlorinated biphenyl in the insulating oil is reacted with a metal sodium in the sodium dispersant to dechlorinate the polychlorinated biphenyl. |
