Regioselective Preparation of 4-Nitro-<i>o</i>-xylene Using Nitrogen Dioxide/Molecular Oxygen over Zeolite Catalysts. Remarkable Enhancement of <i>para</i>-Selectivity

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  • Hongtao Liu
    School of Chemical Engineering, Hefei University of Technology
  • Cheng Ji
    School of Chemical Engineering, Hefei University of Technology
  • Xiongzi Dong
    School of Chemical Engineering, Hefei University of Technology
  • Xinhua Peng
    School of Chemical Engineering, Hefei University of Technology
  • Chunjie Shi
    School of Chemical Engineering, Hefei University of Technology

抄録

<jats:title>Abstract</jats:title> <jats:p>In the presence of molecular oxygen and zeolite H-β with Si/Al2 = 500, o-xylene reacted regioselectively with liquid nitrogen dioxide at 35 °C to yield mononitro-o-xylenes as the main product, where the 4-nitro-o-xylene isomer predominated up to 89% and the 4-nitro-/3-nitro-o-xylene isomer ratio improved to 7.8. The process is eco-friendly, less expensive, and the zeolite could be easily regenerated by a simple workup to afford results similar to those obtained with the fresh catalyst.</jats:p>

収録刊行物

  • Chemistry Letters

    Chemistry Letters 43 (6), 817-819, 2014-06

    Oxford University Press (OUP)

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