专利检索 ap:("Zhejiang NHU Company Ltd." OR "Zhejiang University" OR "Shandong Nhu Amino Acid Co., Ltd." OR "Shandong Nhu Fine Chemical Science AND Technology Company Ltd.") AND inv:"LIU, Qing" 第 1 页

1.

发明公开
METHOD FOR PREPARING ISOPHORONE DIAMINE BY MEANS OF HYDROGENATION REDUCTION OF ISOPHORONE NITRILE IMINE 审中-公开

公开(公告)号：EP3677566A1

公开(公告)日：2020-07-08

申请号：EP18890918.8

申请日：2018-11-30

申请人： Zhejiang NHU Company Ltd. , Zhejiang University , Shandong Nhu Amino Acid Co., Ltd. , Shandong Nhu Fine Chemical Science and Technology Company Ltd.

发明人： CHEN, Zhirong , MAO, Jianyong , HU, Baishan , LI, Guanbing , LI, Haoran , WANG, Yu , YANG, Yingkuo , LIU, Qing , TANG, Jiyu , CHEN, Weiyong

IPC分类号： C07C209/52 , C07C209/48 , C07C211/36 , B01J8/02

摘要： 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.