アミン類を主剤とする防食剤の研究 (第24報)
インヒビターと触媒毒との関連性 その5
1963 年 12 巻 8 号 p. 365-368
詳細
1963 年 12 巻 8 号 p. 365-368
In our previous report, we stated as follows:
Inhibitors-filmed catalyst can stop the hydrogenation reaction, while inhibitor film is on the metallic surface. However, catalyst regains its activity as soon as the film is desorbed from the catalyst.
In this report, we have studied about adsorption and desorption temperature of high molecular weight mercaptans. We tried to make a film on the surface of the Cu (R) catalyst with cetyl mercaptan. It was found difficult to film the catalyst in water only by adding the mercaptan in it. As the mercaptan may associate with hydrogen bonding, it can not be adsorbed on the metal surface. Mercaptan can be adsorbed on the catalyst only when the metal is dipped in water in which mercaptan is dispersed at over 85°C, or, in warmed dioxane in which the association of mercaptan is released. As the mercaptan film departs from catalyst surface at 240°-280°C, catalyst revives its activity and the reaction can proceed, giving different products from non-filmed catalytic reaction. So, we can know the film character by analyzing the reaction products.
