摘要
介绍了3,3’-二氯联苯胺合成新工艺,以邻硝基氯苯为基础原料,经甲醛还原和锌粉还原两步反应制得2,2’-二氯氢化偶氮苯,后经盐酸转位,精制得到3,3’-二氯联苯胺,收率可达到82%,含量可达99%。
This article provides a new process for the preparation of 3, 3＇ - dichlorobenzidine by reduction of o - nitrochlorobenzene with formaldehyde and zinc power, and subsequent so- called benzidine rearrangement catalyzed by hydrochloric acid and purification. The total yield and the purity Of 3,3＇ - dichlorobenzidine can reached to 82 96 and 99 96, respectively.
出处
《山东化工》
CAS
2006年第3期10-12,共3页
Shandong Chemical Industry
关键词
邻硝基氯苯
3
3'-二氯联苯胺
合成
o - nitrochlorobenzene
3,3＇ - dichlorobenzidine
synthesis
