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.

开发了一种易于通过初湿浸渍法制备的非贵金属双金属催化剂Cu ₁₅ Pr ₃ / Al ₂ O _3，用于将胺类的乙酰丙酸（LA）还原胺化为N-取代的5-甲基-2-吡咯烷酮。在该催化剂上以高收率获得了各种N-取代的5-甲基-2-吡咯烷酮。XRD，H ₂ -TPR，XPS，TEM，NH ₃ -TPD和N ₂吸附-脱附的表征结果表明，Cu ⁰种类是在还原胺化反应中用于氢化的活性种类。此外，镨的掺杂到的γ-Al ₂ ö ₃负载的铜催化剂大大提高了的Cu /γ-Al的催化性能₂ ö ₃由于铜的更好的分散⁰。