间接电解氧化合成邻氯苯甲醛

Preparation of o-chlorobenzaldehyde from o-chlorotoluene by Indirect Electrolytic Oxidation

采用Mn(Ⅲ )为氧化媒质 ,以邻氯甲苯为原料 ,苯做溶剂 ,在浓硫酸存在下 ,以甲丁基溴化铵为相转移催化剂 ,用间接电解氧化的方法合成了邻氯苯甲醛 .通过正交实验考察了硫酸浓度、反应温度、反应时间、原料配比 4个因素对产品收率的影响 .确定最佳反应条件为 :硫酸浓度 8.0mol·L-1,反应温度 6 3℃ ,原料配比 :邻氯甲苯∶[Mn3+]为 5∶4,反应时间 4h ,最高收率达 5 5 % .

o\% Chlorobenzaldehyde was prepared from \%o\% chlorotoluene by indirect electrolytic oxidation. Mn\+\{3+\} and sulfuric acid were used cyclically in electrolytic oxidation. Under the conditions of concentration of sulfuric acid 8.0 mol\5L\+\{-1\}, ratio of \%o\% chlorotoluene to \[Mn\+\{3+\}\] 5∶4, reaction temperature 63 ℃, reaction time 4 h, the yield of obtained product was 55 %.