location: Current position: Home >> Scientific Research >> Paper Publications

Pd/C催化加氢法合成3,3′-二氯联苯胺

Hits:

Indexed by:期刊论文

Date of Publication:2005-08-30

Journal:染料与染色

Volume:42

Issue:4

Page Number:64-65,26

ISSN No.:1672-1179

Key Words:催化加氢;邻硝基氯苯;3,3′-二氯联苯胺

Abstract:在碱性介质中,以Pd/C为催化剂,对邻硝基氯苯催化加氢制备2,2′-二氯氢化偶氮苯(DHB)进行研究,采用正交法对加氢还原进行了条件优化,优化条件为:反应温度65℃氢氧化钠质量浓度为:538g/I;Pd/C用量为4.0%;助催化剂NQON用量为2.67%.在该条件下催化剂可重复使用6次,所得产物DHB质量分数大于94.5%.在强酸性条件下,将DHB重排得3,3′-二氯联苯胺盐酸盐,重排反应收率为90.0%,总收率85.0%.

Pre One:3,5-二氯苯胺合成4,5,7-三氯喹啉

Next One:催化加氢法合成2,2′二氯亚肼苯