钴卟啉对空气氧化环己烯合成环己烯酮的催化作用

引　言环己烯酮是一种非常重要的化工中间体 ,广泛应用于医药和农药中 ,如环己烯酮类除草剂1] .取代后的环己烯酮是合成取代苯酚的中间体2 ] .环己烯酮较早的合成方法是在冰醋酸溶剂中铬酐氧化环己烯制得3] .该法产率低、分离困难且污染严重 .为此 ,化学家做了大量的工作 .乙酰丙酮钴4 ] 、组氨酸席夫碱锰配合物5] 等被用来催化分子氧氧化环己烯合成环己烯酮 ,环己烯转化率和环己烯酮选择性均取得较好的效果 ,但反应需要较高比例的溶剂 .谢高阳等以钯单取代十二钼磷酸盐催化氧化环己烯6 ] ,环己烯酮选择性为摩尔比 36 % .金属卟啉在催…

CATALYSIS OF SIMPLE COBALTPORPHYRIN FOR AERIAL OXIDATION OF CYCLOHEXENE TO CYCLOHEXENONE

Simple cobalt tetraphenylporphyrins was synthesized and used to catalyze cyclohexene oxidation into cyclohexenone with air in the absence of additives and solvents.The cobalt metalloporphyrin was found to be very effective catalysts for the synthesis of cyclohexenone from cyclohexene.The research results showed that the temperature, air velocity,catalyst concentration and pressure influenced the yield and conversion of cyclohexene oxidation with air.For cyclohexene oxidation catalyzed by simple cobalt tetraphenylporphyrin, the conversion of cyclohexene was up to 21%, the yield of cyclohexenone reached 75%, under the optimum conditions of 0.4 MPa, 80 ℃ and 2.3×10^-5mol•L^-1 cobalt tetraphenylporphyrin.