Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (9): 1033-1039.DOI: 10.11944/j.issn.1000-0518.2015.09.150028

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Selective Oxidation of Benzyl Alcohol to Benzaldehyde Catalyzed by Co2/Al/Mgx Hydrotalcite-like Materials in Liquid Phase

LIU Jie,ZHOU Weiyou,WU Zhong,SUN Fu'an,HE Mingyang,CHEN Qun()   

  1. Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University,Changzhou,Jiangsu 213164,China
  • Received:2015-01-23 Accepted:2015-05-06 Published:2015-08-31 Online:2015-08-31
  • Contact: CHEN Qun
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21403018)

Abstract:

Co2/Al/Mgx layered double hydroxides(LDHs) with different Co2/Al/Mgx ratios(x=0.5, 1, 1.5 and 2) were prepared and characterized by XRD, SEM, FT-IR, BET and ICP techniques. These catalysts were studied for selective oxidation of benzyl alcohol to benzaldehyde. The results indicate that the selectivity of benzaldehyde increases with increasing of Mg content. Under the optimized condition: 0.02 mol of benzyl alcohol, 100 mg of Co2AlMg1-LDH, 0.04 mol of tert-butyl hydroperoxide, 8 mL of acetonitrile, reaction temperature 60 ℃ and reaction time 9 h, the conversion of benzyl alcohol is 39.5% and the selectivity of benzaldehyde reaches 89.2%. The catalysts are reused 5 times without obvious loss of the catalytic activity and selectivity.

Key words: hydrotalcite-like compounds, base, benzyl alcohol, selective oxidation, benzaldehyde