Ammonia → Isophorone diamine

Participants

Reaction Steps

In a continuously operated laboratory apparatus comprising a first reactor charged with 100 ml of Al2O3 (4 mm extrudates) and a second reactor charged with 240 g (200 ml) of the Raney catalyst produced as described in example 1, 32 ml/h of isophoronenitrile are hydrogenated by means of 300 ml/h of H2 in the presence of 147 ml/h of NH3 at 250° C. and a pressure of 250 bar. The space velocity over the catalyst is 0.15 kg/l (catalyst)*h, and the residence time is 44 minutes. At a conversion of 99.2%, isophoronediamine is obtained with a selectivity of 89.5%. The cis/trans isomer ratio is 79:21.

Provenance & Evidence