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Liquid Phase Hydrogenation of Nitrobenzene to Para-Aminophenol over Pt/ZrO2 Catalyst and SO4 2−/ZrO2–Al2O3 Solid Acid

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Abstract

ZrO2–Al2O3 binary oxide was prepared by homogeneous coprecipitation method. SO4 2−/ZrO2 and SO4 2−/ZrO2–Al2O3 were prepared by impregnation method and were characterized by BET, XRD and TPD. Pt/ZrO2 was prepared by incipient wetness impregnation of ZrO2 with an aqueous solution of H2PtCl6. Subsequently, hydrogenation of nitrobenzene to para-aminophenol over Pt/ZrO2 catalyst and SO4 2−/ZrO2–Al2O3 solid acid using water as solvent was performed. The results indicate that para-aminophenol as well as a small quantity of aniline and ortho-aminophenol are obtained without using any environmentally undesirable liquid acid. The para-aminophenol selectivity reaches to 74.9% with 44.8% of nitrobenzene conversion under the optimal reaction conditions. And the amount of Al2O3 in SO4 2−/ZrO2–Al2O3 has great influence on the selectivity to para-aminophenol.

Graphical Abstract

Hydrogenation of nitrobenzene to para-aminophenol over Pt/ZrO2 catalyst andSO4 2−/ZrO2–Al2O3 solid acid was developed. The results indicate that para-aminophenol as well as a small quantity of aniline and ortho-aminophenol are obtained without using any environmentally undesirable liquid acid. The para-aminophenol selectivity reaches to 74.9 with 44.8% of nitrobenzene conversion under the optimal reaction conditions. And the amount of Al2O3 in SO4 2−/ZrO2–Al2O3 has great influence on the selectivity to para-aminophenol.

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Acknowledgments

This work was supported by the NSFC (20976148), Scientific Research Fund of Hunan provincial Education Department (09A090, 09CY007) and Project (2009LC004, 09HJYH03).

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Authors and Affiliations

  1. College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China

    Pingle Liu, Yaohua Hu, Min Ni, Kuiyi You & Hean Luo

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  1. Pingle Liu
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  2. Yaohua Hu
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  3. Min Ni
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  4. Kuiyi You
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  5. Hean Luo
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Correspondence to Pingle Liu or Hean Luo.

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Liu, P., Hu, Y., Ni, M. et al. Liquid Phase Hydrogenation of Nitrobenzene to Para-Aminophenol over Pt/ZrO2 Catalyst and SO4 2−/ZrO2–Al2O3 Solid Acid. Catal Lett 140, 65–68 (2010). https://doi.org/10.1007/s10562-010-0427-8

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  • DOI: https://doi.org/10.1007/s10562-010-0427-8

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