Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (5): 559-563.DOI: 10.11944/j.issn.1000-0518.2018.05.170154

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Synthesis of Pyridine and 3-Picoline from Acrolein Diethyl Acetal and Ammonia over La- and KF-modified Y Type Zeolite Catalysts

LUO Caiwuab*(),ZHAO Yongab,JIANG Fuliangab,LI Xiangyangab,CHAO Zishengc*()   

  1. aSchool of Environmental and Safety Engineering,University of South China,Hengyang,Hunan 421001,China
    bHunan Engineering Research Center for Uranium Tailings Decommission and Treatment,Hengyang,Hunan 421001,China
    cCollege of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China;
  • Received:2017-05-12 Accepted:2017-08-25 Published:2018-04-23 Online:2018-04-23
  • Contact: LUO Caiwu,CHAO Zisheng
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21376068), the Educational Commission of Hunan Province(No.17C1361), the Doctoral Scientific Research Foundation of University of South China(No.2016XQD36)

Abstract:

The synthesis of pyridine and 3-picoline from the reaction of acrolein diethyl acetal, water and ammonia was conducted in a fixed-bed reactor. The catalytic activities of La- and KF-modified Y zeolites were compared. Various influencing parameters, including the loadings and modified ways of La species, the loadings of KF and the calcination temperature of KF/Y, were systematically investigated. Compared to pure Y zeolite, La- and KF-modifications can enhance the catalytic activities. The catalytic activity of La-modified Y through ion exchange is better than that of the sample through wet impregnation. The total yield of pyridine and 3-picoline reaches the maximum while the loading of La via the wet-impregnation method is 1% mass fraction and the calcination temperature of KF/Y is 700 ℃.

Key words: acetal, picoline, pyridine, La-Y, KF/Y zeolite