Abstract
The hydrogenation of propionitrile on copper-lanthanide oxide catalysts (2Cu·CeO 2 and 4Cu·Ln 2O 3 (Ln = La, Pr, Nd)) was studied in the gas phase. The activity of the catalysts varies with the lanthanide in the order 2Cu·CeO 2 > 4Cu·Pr 2O 3 > 4Cu·La 2O 3 ≥ 4Cu·Nd 2O 3, while the activation energies varies in the opposite order, except for 2Cu·CeO 2. The main product was the primary amine, n-propylamine. The formation of the unstable imine CH 3CH 2N CHCH 3 as a major product over 2Cu·CeO 2 seems to be consistent with the acidity of the catalyst. The catalysts were more selective than conventional copper impregnation catalysts, Cu (10 wt.%) on SiO 2, La 2O 3 or CeO 2, that produce significant quantities of the secondary amine.
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