Method for preparation of 4,4'-dintrodiphenylamine and 4,4'-bis(alkylamino)diphenylamine with the base catalyst complex

摘要

This invention is a service base catalyst used for the reaction of the components and nitrobenzene using the NASH reaction - a quaternary ammonium salt group and the reaction mixture was prepared in a high yield of 4,4'-DNDPA after use , the 4,4'-DNDPA is 4 ' high yield and purity by reacting a ketone with hydrogen and a hydrogenation catalyst under hydrogenation It provides a method for producing a BAADA. The catalyst mixture used in the present invention is the recovery process can be simple and excellent in the high base stability to lower the production cost of the recovery of commercially securing favorable economics .