1,1,1-トリクロロエタンとアルミニウムとの反応の誘導期

抄録

Some factors controlling the induction period (IP) of the reaction between 1, 1, 1-trichloroethane (CCl₃CH₃) and aluminum (Al) were investigated. The results were compared with results previously reported and obtained from recent work on the reaction between carbon tetrachloride (CCl₄) and Al. It was found that: 1) A minute amount of water or oxide film on the surface of Al has the effect of extending the IP, but the effect is smaller than that obtained for the reaction between CCl₄ and Al.
Specifically, when the oxide film on the surface of Al is removed by making scratch marks, the IP is reduced to less than 5 seconds, regardless of the presence of minute amounts of water. This reaction also occurs at room temperature. 2) Unlike the cases of CCl₄, when Al purity is 93%, the IP is shorter than when pure 99% Al is used. 3) Some of the inhibitors that extend the IP on pure 99.99 and 99% Al have no effect on Al of lower purity (93%). This phenomenon does not occur when CCl₄ is employed. 4) When pure Al plate is used, the IP is 100-120 minutes in boiling CCl₄ and 4-5 minutes in boiling CCl₃CH₃, and this difference can be ascribed to the fact that minute amounts of water and components other than Al in the aluminum alloy have a minor effect on extending the IP in CCl₃CH₃.