Acidic/Basic Oxides-Supported Cobalt Catalysts forOne-Pot Synthesis of Isophorone Diamine from Hydroamination of IsophoroneNitrile.

A seriesof cobalt-based catalysts supported on several acidic/basicoxides were prepared by the incipient wetness impregnation methodand applied for the one-pot synthesis of isophorone diamine (IPDA)from hydroamination of isophorone nitrile (IPN). The effects of thesupports and cobalt loading on the performance of the catalysts wereinvestigated. The results showed that the Co/SiO2catalystwith 20 wt % Co loading gave the highest conversion of IPN (90.9%)and yield of IPDA (70.4 mol %) among the supported cobalt catalystsused in this work, and it could be reused eight times without a significantdecrease in the catalytic performance, which was much better thanthat from the commercial Raney Co. Meanwhile, the possible intermediatesand reaction pathways during hydroamination of IPN were provided. [ABSTRACT FROM AUTHOR]