Study on Pd-Pb/CaCO_3 Catalyst for Selective Hydrogenation of Acetylenic Link in Hydrocarbon

Influence of quinoline,catalyst,temperature and so on,on selective hydrogenation of acetylenic link was investigated with orthogonal test method.The results of analysis of variance and test of significance indicate that,mixing different doses of quinoline and catalyst do cause obvious difference in hydrogenation selectivity of alkynes.Then the optimal reaction condition is established by bipartite graph.The trial of different reductive methods explains that hydrazine hydrate is also a kind of good reducing agent.Comparison of the double impregnation method (DI) with the conventional impregnation method (CI) shows that the properties of the catalyst prepared by DI method are better than those prepared by CI method.Ensuing improvement of semihydrogenation selectivity was found and discussed.