There is disclosed a process for the synthesis of para-nitrodiphenylamines wherein the improvement is characterized in that a specific co-catalyst system is utilized. More specifically, a zinc (II) compound (zinc in the plus two oxidation or valence state), is used in conjunction with copper or a copper compound as a co-catalyst system in the preparation of para-nitrodiphenylamines.
本发明公开了一种合成对硝基
二苯胺的工艺,其改进的特征在于使用了一种特定的助催化剂体系。更具体地说,在制备对硝基
二苯胺的过程中,
锌(II)化合物(
锌的氧化态或价态为正二态)与
铜或
铜化合物一起用作助催化剂体系。