Abstract��
In the preparation of 4-amino-2,2,6,6-tetramethyl-4-piperidine from 4-amino-2,2,6,6-tetramethyl-4-piperidone and ammonia,Raney-Co was used as catalyst instead of Raney-Ni and the by-production of 2,2,6,6-tetramethyl-4-piperidinol was avoided.The ratio of cobalt to aluminium and the reaction parameters were investigated systematically.Under optimum conditions,the yield of 4-amino-2,2,6,6-tetramethyl-4-piperidine is up to 98% and the catalysts show good stability.
LI Yang,XING Jun-de,WANG Lei,CHEN Li-gong.Preparation of 4-Amino-2,2,6,6-Tetramethyl-4-Piperidine in Presence of Catalyst[J]. Chemcial Industry and Engineering, 2006,23(4): 323-326
2006, Vol. 23 
