Mesoporous SiO2–Al2O3 supported chromium sesquioxide catalyst for cyclohexane nitrosation to ε-caprolactam with high selectivity

  • Fang Hao
  • Yongzhe Yang
  • Wei Xiong
  • Pingle Liu
  • Kuiyi You
  • He’an Luo
Article
  • 21 Downloads

Abstract

Mesoporous SiO2–Al2O3 supported Cr2O3 catalysts were prepared by the sol–gel and impregnation methods. These catalysts were characterized and applied in cyclohexane nitrosation reaction. The effects of the preparation conditions and the catalyst deactivation were studied. The results show that 20% Cr2O3/SiO2–Al2O3 catalyst calcined at 400 °C exhibits not only the larger surface area, smaller particle size, but also the larger amount of Cr2+ and Brønsted acid sites. These catalysts show good catalytic performances in the cyclohexane nitrosation to ε-caprolactam and could be recycled for several times in this reaction system for the first time. The catalyst of Cr2O3/SiO2–Al2O3 calcined at 400 °C gives 10.8% conversion with 79.9% selectivity to ε-caprolactam.

Keywords

Cr2O3/SiO2–Al2O3 catalyst ε-Caprolactam Cyclohexane Nitrosation 

Notes

Acknowledgements

This work was supported by NSFC (U1662127, 21306160), Project of Hunan Provincial Natural Science Foundation of China (2016JJ2123, 2018JJ3497), Project of Hunan provincial Education Department (17C1525), and Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization.

Supplementary material

11144_2018_1397_MOESM1_ESM.pdf (724 kb)
Supplementary material 1 (PDF 723 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Fang Hao
    • 1
  • Yongzhe Yang
    • 1
  • Wei Xiong
    • 1
  • Pingle Liu
    • 1
  • Kuiyi You
    • 1
  • He’an Luo
    • 1
  1. 1.College of Chemical EngineeringXiangtan UniversityXiangtanChina

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