【摘要】 用电化学方法合成苯甲醛是一种合成有机物的新方法，它具有少废、效率高等优点，发展前景广阔．采用“槽内式”电合成苯甲醛，其特点是在一个设备中既实现了Mn2+在阳极上被氧化为Mn3+的电解过程，又实现了Mn3+氧化甲苯反应过程，从而提高设备利用率，为了得到更高的电流收率，研究了硫酸浓度、电流密度、硫酸锰浓度、温度、电解时间以及槽电压等因素对此过程的影响规律，在此基础上确定了“槽内式”电合成苯甲醛的最佳条件当电流密度为100mA／cm2，硫酸的质量分数为50％，硫酸锰浓度0．5mol／l，电解温度50℃及电解时间3h，苯甲醛电流收率可达20％．更多还原

【Abstract】 The synthesis of benzaldehyde by electrochemistry is a new method with less pollutants and high efficiency for synthesizing organic substance, and has prosperous future." In - cell" electrosynthesis of benzaldehyde is characterized by electro - oxidation of Mn2+ at anode and reaction of Mn3+ with toluene in one equipment so that the utilization ratio of the equipment is increasesd. The effect of several importan factors such as current density, H2SO4 concentratio, MnSO4 concentration, electrolytic time, cell voltage, etc, on the current yield and optimal electrolytic conditions are established. At current density of 100 mA/cm2, 50% H2SO4, 0. 5 mol/l MnSO4, electrolytic temperature 50 ℃ and electrolytic time 3 h, the current yield of benzaldehyde goes up to 20%.更多还原