Journal
CATALYSIS LETTERS
Volume 140, Issue 1-2, Pages 65-68Publisher
SPRINGER
DOI: 10.1007/s10562-010-0427-8
Keywords
Nitrobenzene hydrogenation; Para-aminophenol; Bamberger rearrangement; SO42-/ZrO2-Al2O3 solid acid
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Funding
- NSFC [20976148]
- Scientific Research Fund of Hunan provincial Education Department [09A090, 09CY007, 2009LC004, 09HJYH03]
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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.
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