Efficient and convenient oxidation of cyclohexene to adipic acid with H2O2 catalyzed by H2WO4 in acidic ionic liquids
作者:Bingtong Wang、Zongbin Zhang、Xinyu Zhang、Shixin Sun、Lin Wu、Rong Xing
DOI:10.1007/s11696-017-0303-8
日期:2018.3
A simple, efficient, and eco-friendly catalytic system for the oxidation of cyclohexene to adipic acid with H2O2 catalyzed by H2WO4 in Brønsted acidic ionic liquids under solvent-free conditions has been developed. Reaction conditions such as the catalysts, the types of anions and cations for Brønsted acidic ionic liquids, reaction temperature, and the amount of hydrogen peroxide, were investigated
一个简单的,高效和环境友好的催化剂体系对环己烯氧化成己二酸用H 2 ö 2由H催化2 WO 4在布朗斯台德酸性的离子液体无溶剂的条件下得到了发展。研究了催化剂的反应条件,布朗斯台德酸性离子液体的阴离子和阳离子类型,反应温度和过氧化氢的量。此外,使用紫外可见分光光度法测定了布朗斯台德酸性离子液体的哈米特酸度函数(H 0)。确定的最佳反应条件为n(H 2 WO 4):n(布朗斯台德酸性离子液体):n(环己烯):n(H 2 O 2)= 0.02:0.02:1:4.4,在10mmol的反应规模下己二酸的产率为96%。该催化体系可以轻松回收并重新用于四个反应运行,而不会显着降低催化活性。催化剂系统的简单操作和避免一氧化二氮的排放是这项工作的好处。