间接电解氧化法合成正丁醛

Synthesis of n-Butanal with Indirect Electrolytic Oxidation Method

提出了一种合成正丁醛的新方法———间接电解氧化法 .在陶瓷隔膜电解槽中 ,用Pb/PbO2 作阳极 ,石墨作阴极 ,将Mn2 + 氧化成Mn3 + ,然后用Mn3 + 作氧化剂对正丁醇进行氧化获得正丁醛 ,还原所得的Mn2 + 可循环利用 .电解的优选条件为 :C硫酸 =4 .0mol/L ,电流密度 80 0A/m2 ,CMn(II) =0 .5mol/L ,温度t=2 0℃ .

A new method ofsynthesis of nbutanal was adopted with indirect electrolyticoxidation byusing Pb/PbO2asanode and graphite as cathode.Mn(II) was oxidized to Mn(III) inelectrolysis tankof septum, then 1butanol was oxidized to nbutanal by Mn(III), reduced Mn(II) can be used repeatedly. The optimum condition is as follows: sulfuric acid concentration of 4.0 mol/L, current density of 800 A/m2, manganese ion (II) concentration of 0.4 mol/L, temperature of 20 ℃.