电化学法制备邻苯二胺

The Electrochemical Preparation of 1,2-Diaminobenzene

在乙醇—盐酸溶液中以Ｐｂ为阴极，电解还原邻二硝基苯以制各邻苯二胺。阴极液为８０ｍＬ乙醇—盐酸溶液（乙醇与１０％盐酸的体积比为１：１）加２．５０ｇ邻二硝基苯，温度为９０±℃，电流密度为４．５Ａ／ｄｍ２，电量为理论电量时，邻苯二胺的最大产率达９７．８％。

Electrolytic reduction of 1,2-dinitrobenzene(Ⅰ)to1,2-diaminobenzene(Ⅱ)at a leadcathode was conducted in ethylalcoholpe-HCl solution.Amaximum yield of 97.8%of(Ⅱ)was ob tained.Optimum conditions were cathode solution 80 mL ethylalcohol-HCl(ethylalcohol:10% HCl=1:1(V/V))+2.50g(Ⅰ),temperature 90±℃,cathodic current density 4.5 A/dm2 and the the oretical current was passed.