METHOD FOR PREPARATION OF 4,4'-DINITRODIPHENYLAMINE AND 4,4'-BIS(ALKYLAMINO)DIPHENYLAMINE WITH THE BASE CATALYST COMPLEX
申请人:Kim Jin-Eok
公开号:US20120157713A1
公开(公告)日:2012-06-21
Provided is a method for preparing 4,4′-dinitrodiphenylamine (4,4′-DNDPA) in high yield via the NASH reaction using a mixture of a bis-quaternary ammonium base and a base catalyst for the reaction of urea with nitrobenzene, and a method of preparing 4,4′-bis(alkylamino)diphenylamine (4,4′BAADA) in high yield and purity by hydrogenating the resulting 4,4′-DNDPA with a ketone in the presence of hydrogen and hydrogenation catalyst. The catalyst complex used in the present invention allows easy recovery, provides superior alkaline stability and is capable of reducing production cost.
提供了一种通过NASH反应以高收率制备4,4'-二硝基二苯胺(4,4'-DNDPA)的方法,该方法使用双季铵碱和碱催化剂的混合物进行尿素与硝基苯的反应,以及通过在氢气和氢化催化剂存在下将得到的4,4'-DNDPA与酮氢化,以高收率和纯度制备4,4'-双(烷基氨基)二苯胺(4,4'BAADA)的方法。本发明中使用的催化剂复合物允许容易回收,提供卓越的碱性稳定性,并且能够降低生产成本。