Ulmer & Berne LLP
Method for preparing isophorone diamine by means of hydrogenation reduction of isophorone nitrile imine
The present disclosure relates to a method for preparing isophorone diamine by means of a hydrogenation reduction of isophorone nitrile imine. The hydrogenation reduction is continuously carried out in a multi-stage bubble column reactor loaded with a supported alkaline cobalt-based catalyst, wherein isophorone nitrile imine is successively in countercurrent contact with hydrogen in each stage of the reactor to carry out a hydrogenation reduction reaction, so as to obtain the isophorone diamine. The preparation method solves the problem of back-mixing, and further improves the conversion rate and the cis/trans ratio of the product.
Zhejiang Nhu Company Ltd. Shandong Nhu Amino Acid Co., Ltd. Shandong Nhu Fine Chemical Science and Technology Company Ltd. Zhejiang University
B C C B B
B01J C07C C07C B01J B01J
inventional inventional inventional inventional inventional
Weiyong Guanbing Zhirong Baishan Yu Yingkuo Jiyu Haoran Jianyong Qing
Chen Li Chen Hu Wang Yang Tang Li Mao Liu