PROCESS FOR PREPARING 3-AMINOMETHYL-3,5,5-TRIMETHYLCYCLOHEXYLAMINE

摘要

Isophoronediamine, is prepared by A) subjecting isophoronenitrile directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and an optional additive, and in the presence or absence of an organic solvent; or B) first converting isophoronenitrile fully or partly in at least two or more than two stages to isophoronenitrile imine, and subjecting the isophoronenitrile imine to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with another component and/or isophoronenitrile, in the presence of at least ammonia, hydrogen and a catalyst.

主权项

1. A process for preparing isophoronediamine, comprising:
A) subjecting isophoronenitrile directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and an optional additive, and in the presence or absence of an organic solvent; or B) converting isophoronenitrile to isophoronediamine in at least two or more than two stages,
wherein isophoronenitrile is first converted fully or partly to isophoronenitrile imine, and the isophoronenitrile imine is subjected to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with another component and/or isophoronenitrile,
wherein the aminating hydrogenation proceeds in the presence of at least ammonia, hydrogen and a catalyst: wherein the catalyst has, after catalyst activation, in its entirety, the following composition in percent by weight (% by weight), wherein the proportions add up to 100% by weight, based on the metals present: cobalt: 55% to 95% by weight, aluminium: 5% to 45% by weight, chromium: 0% to 3% by weight, and nickel: 0% to 7% by weight; and wherein the catalyst is in the form of hollow spheres having a diameter of 1 to 8 mm.