高分散[Pd-Pt]/活性炭催化喹啉加氢制备1,2,3,4-四氢喹啉

Selective Hydrogenation of Quinoline to Prepare 1,2,3,4-Tetraquinoline over Highly Dispersed [Pd-Pt]/C Catalysts

利用双表面活性剂(Tween-20和Brij-35)保护的方法,制备并表征了一系列[Pd-Pt]/C催化剂。将该催化剂应用于喹啉催化加氢制备1,2,3,4-四氢喹啉反应中,结果表明,质量分数5%[Pd-Pt(1:3)]/C的催化活性最高。以乙醇为溶剂,初始底物浓度为2.4 mol/L,于130℃,2.5 MPa氢气压力下反应50 min,喹啉的转化率为100%,1,2,3,4-四氢喹啉选择性为100%。

Two kinds of surfactants were used to synthesize a series of [ Pd-Pt ]/C bimetallic catalysts. These catalysts were characterized and used in selective hydrogenation of quinoline to prepare 1,2,3,4- tetraquinoline. The mass fraction 5% [ Pd-Pt （1：3）I/C holds the highest activity among these catalysts. The effect of solvent, temperature, pressure and the initial concentration on the reaction was studied. The conversion of quinoline was 100% and the selectivity of 1 ,2,3,4-tetraquinoline was up to 100% under optimal reaction conditions：c（quinoline） =2.4 tool/L, 130 ℃ ,2.5 MPa,50 min.