对氯苯肼是一种重要的化工中间体,广泛用于医药、农药、染料等的合成。在农药方面主要用于合成农药杀菌剂、除草剂、杀虫剂等。目前,对氯苯肼的合成工艺路线主要是以对氯苯胺为原料,经重氮化后得对氯苯胺重氮盐,再用亚硫酸钠、亚硫酸氢钠或氯化亚锡还原制得。但重氮化时反应难以控制;以亚硫酸钠或亚硫酸氢钠还原时控制条件较多,工艺过程复杂,易产生沥青状副产物;用氯 Para-chlorophenyl hydrazine is an important chemical intermediate, widely used in the synthesis of medicine, pesticides, dyes and so on. In pesticides mainly for synthetic pesticides fungicides, herbicides, pesticides and so on. At present, the synthesis of p-chlorophenylhydrazine process route is based on p-chloroaniline as raw material, after diazotization of chloroaniline diazonium salt, and then sodium sulfite, sodium bisulfite or stannous chloride reduction obtained. However, the diazotization reaction is difficult to control; with sodium sulfite or sodium bisulfite reduction control conditions are more complex process, easy to produce bitumen-like by-product; with chlorine