| abstract |
The invention discloses a catalyst for preparing m-xylylenediamine by continuous catalytic hydrogenation. The catalyst is composed of a carrier, active components supported on the carrier, and auxiliary agents. The active components are Ru and Ni, and the auxiliary agents are: Any one of Ce, Mn or Fe; according to 100%, the weight percentage of each component is as follows: Ru 0.5-3.0%, Ni 10-30%, auxiliary 0.1-0.5%, and the rest are carriers; The carrier is an Al 2 O 3 -TiO 2 composite carrier; at the same time, the invention also discloses a preparation method of the catalyst and its application in continuous catalytic hydrogenation to prepare m-xylylenediamine. The active metal of the catalyst has high dispersity, high activity and good selectivity, the conversion rate of isophthalonitrile can reach 100%, and the product selectivity of m-xylylenediamine is over 95%, and the continuous production of m-xylylenediamine is realized. , increased productivity. |