Abstract
A nonnoble bimetallic metal catalyst Cu15Pr3/Al2O3 readily prepared through incipient-wetness impregnation method was developed for the reductive amination of levulinic acid (LA) with amines to N-substituted-5-methyl-2-pyrrolidinones. A wide variety of N-substituted-5-methyl-2-pyrrolidinones were obtained in high yield over this catalyst. The characterization results from XRD, H2-TPR, XPS, TEM, NH3-TPD and N2 adsorption-desorption revealed that Cu0 species are the active species for the hydrogenation in the reductive amination reaction. Besides, the doping of praseodymium into γ-Al2O3 supported copper catalyst greatly enhanced the catalytic performance of Cu/γ-Al2O3 due to better dispersion of Cu0.
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