초록 ▼

Disclosed is a catalyst for hydrogenation of 4,4′-methylenedianiline (MDA), including a support, a magnesium-aluminum oxide layer covering the support, and a rhodium-ruthenium active layer loaded on the magnesium-aluminum oxide layer, wherein the rhodium and the ruthenium of the rhodium-ruthenium ac

Disclosed is a catalyst for hydrogenation of 4,4′-methylenedianiline (MDA), including a support, a magnesium-aluminum oxide layer covering the support, and a rhodium-ruthenium active layer loaded on the magnesium-aluminum oxide layer, wherein the rhodium and the ruthenium of the rhodium-ruthenium active layer have a weight ratio of 40:60 to 10:90. The hydrogenation catalyst can be collocated with hydrogen for hydrogenation of the MDA to form bis(para-amino cyclohexyl) methane (PACM), and the PACM contains 0 mol % to 25 mol % of (t,t)-isomer.

대표청구항 ▼

1. A catalyst for hydrogenation of 4,4′-methylenedianiline, comprising: a support,a magnesium-aluminum oxide layer covering the support; anda rhodium-ruthenium active layer loaded on the magnesium-aluminum oxide layer,wherein the rhodium and the ruthenium of the rhodium-ruthenium active layer have a

1. A catalyst for hydrogenation of 4,4′-methylenedianiline, comprising: a support,a magnesium-aluminum oxide layer covering the support; anda rhodium-ruthenium active layer loaded on the magnesium-aluminum oxide layer,wherein the rhodium and the ruthenium of the rhodium-ruthenium active layer have a weight ratio of 40:60 to 10:90. 2. The catalyst as claimed in claim 1, wherein the support comprises silica or alumina. 3. The catalyst as claimed in claim 1, wherein the support has a specific surface area of 100 m2/g to 300 m2/g. 4. The catalyst as claimed in claim 1, wherein the magnesium-aluminum oxide layer and the support have a weight ratio of 1:1 to 1:4. 5. The catalyst as claimed in claim 1, wherein the magnesium and the aluminum of the magnesium-aluminum oxide layer have a weight ratio of 2:1 to 1:2. 6. The catalyst as claimed in claim 1, wherein the rhodium-ruthenium active layer and the support have a weight ratio of 1:24 to 1:16. 7. A method of hydrogenating 4,4′-methylenedianiline, comprising: hydrogenating the 4,4′ -methylenedianiline to form a bis(para-amino cyclohexyl) methane by the catalyst as claimed in claim 1 with hydrogen. 8. The method as claimed in claim 7, wherein the bis(para-amino cyclohexyl) methane has a t,t-isomer molar ratio of 25 mole % to 0 mole %. 9. The method as claimed in claim 7, wherein the hydrogen has a pressure of 60 bar to 70 bar. 10. The method as claimed in claim 7, wherein the step of hydrogenating the 4,4′-methylenedianiline is performed at a temperature of 120° C. to 160° C.