到 p-menthane 水疗院过氧化物(PMHP ) 的 p-menthane 的氧气的氧化在空气的气压下面在一个断断续续的模式面对 metalloporphyrins 被调查。几个重要反应参数例如 metalloporphyrin,空气流动率,和温度的结构,被学习。metalloporphyrins 催化的 p-menthane 的氧气的氧化的初步的机制也被讨论。结果证明反应被 metalloporphyrins 的增加极大地在很低的集中加速,以收益和 PMHP 的形成率,并且 PMHP 的高选择在反应期间被维持。120 ℃的温度和约 5 h 的反应时间面对 0.06 mmol/L monomanganeseporphyrins 是为最好的结果的最佳的条件((打印机控制语言) TPPMnCl ) 。而且,当反应与经常的温度相比在规划温度下面被执行时, PMHP 的收益显著地被增加。当反应被 0.06 mmol/L 催化时((打印机控制语言) TPPMnCl )以为 4 的 600 mL/min 和 120 ℃ 的空气流动率, h ,然后温度被归结为 110 ℃为另一 4 h , PMHP 的收益到达24.3%,它为 8 h 比在 120 ℃ 或 110 ℃ 的经常的温度的反应的高。
The aerobic oxidation of p-menthane to p-menthane hydroperoxide (PMHP) in the presence of metalloporphyrins was investigated in an intermittent mode under an atmospheric pressure of air. Several important reaction parameters, such as the structure of metalloporphyrin, the air flow rate, and the temperature, were studied. The preliminary mechanism of the aerobic oxidation of p-menthane catalyzed by metalloporphyrins was also discussed. The results show that the reaction is greatly accelerated by the addition of metalloporphyrins at very low concentration, in terms of both the yield and formation rate of PMHP, and the high selectivity of PMHP is maintained during the reaction. Temperature of 120 ℃ and reaction time of around 5 h are the optimal conditions for the best result in the presence of 0.06 mmol/L monomanganeseporphyrins ((p-Cl)TPPMnC1). Furthermore, the yield of PMHP is increased remarkably when the reaction is carried out under programmed temperature compared with the constant temperature. When the reaction is catalyzed by 0.06 mmol/L((p-Cl)TPPMnCl) at the air flow rate of 600 mL/min and 120 ℃ for 4 h, and then the temperature is reduced to 110 ℃, for another 4 h, the yield of PMHP reaches 24.3 %, which is higher than that of the reaction at a constant temperature of 120 ℃ or 110 ℃ for 8 h.