硝基苯在发泡铜阴极上电还原为对氨基苯酚研究

Reduction of Nitrobenzene to pAminophenol through Electrolysis on Foamed Copper Cathodes

研究了以发泡铜为阴极材料 ,硝基苯电解还原制备对氨基苯酚。考察了反应物浓度、介质酸度、电解温度、电解电流、电极尺寸等因素对对氨基苯酚产率的影响。在 80℃ ,硫酸介质体积分数为 2 0 % ,硝基苯在体积分数为 2 0 %正丁醇水溶液中的浓度 1 .8mol L ,通氮气 75mL min ,电解电流 4A条件下 ,电解 2h ,对氨基苯酚的产率达到 93%以上 ,电流效率高于 92 %。

The technical conditions for reduction of nitrobenzene to paminophenol by electrolysis on the foamed copper cathodes were studied. Thus,when electroreduction of 1.8 mol/L nitrobenzene in 20% butanol and 20% sulphuric acid medium under 75 mL/min nitrogen flow rate proceeded for 2 h at 80 ℃ with 4 A current on 50 mm×40 mm×12 mm cathode,the yield of paminophenol could reach 93% and the current dfficiency was higher than 92%.