WANG Haitao,ZHANG Yumin, GAO Shujuan,JIANG Xueying, ZHU Zhixin1, ZHANG Hengbin,LI Kechang,GENG Aifang" />
王海涛,张玉敏,高淑娟,姜雪莹,朱志新,张恒彬,李克昌,耿爱芳
WANG Haitao,ZHANG Yumin, GAO Shujuan,JIANG Xueying, ZHU Zhixin1, ZHANG Hengbin,LI Kechang,GENG Aifang
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0.5 mol·L-1,H2SO4浓度为1.0 mol·L-1,丙酮/水(3∶1)为溶剂,阳极电位为
Abstract: 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.