作　　者： ; ; ; ; ; ; ; ;

机构地区： 吉林大学化学学院

出　　处： 《化工学报》 2010年第S1期82-85,共4页

摘　　要： 通过恒电位电解实验,在以质子交换膜为隔膜的电解槽内,将十二烷基苯磺酸钠(SDBS)添加于2-甲基吡啶电氧化的有机合成体系中,研究了2-甲基吡啶在PbO2电极上的电氧化行为。通过实验确定最佳条件为:2-甲基吡啶浓度为0.5mol·L-1,H2SO4浓度为1.0mol·L-1,丙酮/水(3∶1)为溶剂,阳极电位为1.8V,反应温度为30℃,SDBS浓度为1.6×10-3mol·L-1,电解理论电量的20%,其选择性为81.98%,电流效率为59.32%。在该实验环境下,SDBS对2-甲基吡啶电氧化有明显的促进作用,选择性和电流效率都有明显的提高。 The electro-oxidation of 2-methylpyridine(2-picoline) was investigated at a PbO2 electrode in the presence of sodium dodecylbenzenesulfonate(SDBS) in water/acetone solvents by cyclic voltammetry and controlled-potential coulometry.It was found that the selectivity and the current efficiency of the electro-oxidation from 2-picoline to 2-pyridinecarboxylic acid were obviously higher than that in aqueous and water/acetone mixed solvents when SDBS was added in acetone /water mixed solvents.The results indicate that under the optimal conditions, the reaction can obtain a selectivity of 81.98% and a current efficiency of 59.32%.The present method provides a simple method for electro-oxidation of 2-methylpyridine.

关 键 词： 表面活性剂 十二烷基苯磺酸钠 甲基吡啶 电氧化 吡啶甲酸

领　　域： [理学] [理学]