Patent ID: 9403754
Filing Date: 2016-08-02
CPC Classification: B01J,C07C,Y02P

Claim Text:
1. A process for hydrogenating aromatic amines comprising the steps of: reacting, in a reactor, a mixture of 2,4-diaminotoluene and 2,6-diaminotoluene with hydrogen in the presence of a catalytic system, wherein the catalytic system comprises a mixture of a first heterogeneous catalyst comprising Ru and a second heterogeneous catalyst comprising Rh, wherein the catalytic system further comprises a nitrate salt, a nitrite salt or a combination thereof, and obtaining from the reaction a reaction product comprising a mixture of 2,4-diamino-1-methyl-cyclohexane and 2,6-diamino-1-methyl-cyclohexane, wherein ≦45 mol % of said diamino-1-methyl-cyclohexane reaction products are in the cis-cis-isomer configuration and ≦22 mol % of said diamino-1-methyl-cyclohexane reaction products are in the trans-trans-isomer configuration, wherein the initial rate of the reaction is ≧0.0052 mol H