The high purity m-phenylenediamine was prepared by catalytic hydrogenation of m-dinitrobenzene in ethanol,and then crystallized and rectified.

• 以乙醇为溶剂,骨架镍为催化剂,催化加氢还原间二硝基苯,结晶后经过精馏,制得高纯度间苯二胺,产品符合聚合级要求,收率85%25以上。