清洁催化氧化环己烯合成己二酸反应中酸性配体的作用  

Role of Acidic Ligand for Clean Synthesis of Adipic Acid via Catalytic Oxidation of Cyclohexene

作　　者：宫红[1] 杨中华[1] 姜恒[1] 孙兆林 张晓彤 

机构地区：[1]抚顺石油学院材料科学系,辽宁抚顺113001

出　　处：《催化学报》2002年第2期182-184,共3页

摘　　要：以 30 %H2 O2 为氧源 ,研究了Na2 WO4·2H2 O催化氧化环己烯制己二酸反应中的配体效应 .在大多数情况下 ,配体的酸性越强 ,目标产物己二酸的产率越高 .尽管一些酚类配体、L(+)抗坏血酸和 8 羟基喹啉的酸性较弱 ,但己二酸的产率仍然很高 .这表明影响目标产物产率的因素除配体的酸效应以外 ,还存在配体的配位效应 .邻苯二酚和对苯二酚等酚类配体的实验结果表明 ,反应可能是通过络合催化反应机理完成的 .对酸性配体用量及对反应动力学考察结果表明 ,反应过程中环氧化物水解为 1,2 环己二醇是整个反应的控制步骤 。The effects of ligands on clean synthesis of adipic acid via direct oxidation of cyclohexene with 30% H 2O 2 catalyzed by Na 2WO 4·2H 2O were studied. In most cases, the yield of target product adipic acid is high if the acidity of ligand is strong. Although the acidity of some phenolic ligands, L(+)ascorbic acid and 8 quinolinol is weak, the yield of adipic acid is still high. It is demonstrated that the acidic effect and the coordination effect of ligand play the same important role in oxidaton of cyclohexene with 30%H 2O 2 to adipic acid catalyzed by Na 2WO 4·2H 2O. The experimental results for acidic ligand amount and reaction kinetics show that the hydrolysis of cyclohexene oxide to 1,2 cyclohexandiol is a critical step and the acidity of the reaction system is necessary.

关 键 词：钨酸钠 环已烯 催化氧化 已二酸 酸性配体 反应动力学 

分 类 号：O643.3[理学—物理化学]