摘要
用Raney-Ni为催化剂,CEN为助催化剂,甲醇为溶剂,对2,5-二氯硝基苯进行催化加氢还原,制备了2,5-二氯苯胺。研究了温度、氢气压力及助催化剂等各种工艺条件对反应的影响,并对催化剂进行了套用实验。结果表明,在较佳条件下反应,制得产品收率可达96％,纯度可达99％,催化剂可套用17次以上。
2,5-Dichloroaniline has been prepared by catalytic hydrogenation of 2,5-dinitrobenzene in methanol. The effects of reaction temperature,catalyst and technical conditions were studied. It was found the yield of the product could be as high as 96% with a purity of 99% under the optimum conditions. The catalyst Raney Ni could be cycled as much as 17 times.
出处
《染料工业》
2002年第2期32-33,共2页
Dyestuff Industry
