Liquid Phase Hydrogenation of Nitrobenzene to Para-Aminophenol over Pt/ZrO2 Catalyst and SO42−/ZrO2–Al2O3 Solid Acid
Liquid Phase Hydrogenation of Nitrobenzene to Para-Aminophenol over Pt/ZrO2 Catalyst and SO42−/ZrO2–Al2O3 Solid Acid
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DOI：
10.1007/s10562-010-0427-8
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发表时间：
2010-08
影响因子：
2.8
通讯作者：
Pingle Liu;Y. Hu;Min Ni;K. You;He'an Luo
中科院分区：
文献类型：
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作者：
Pingle Liu;Y. Hu;Min Ni;K. You;He'an Luo
采用均相共沉淀法制备了ZrO 2-Al 2 O3二元氧化物。采用浸渍法制备了SO 42-/ZrO 2和SO 42-/ZrO 2-Al 2 O3，并用BET、XRD和TPD等手段对其进行了表征。采用等湿浸渍法制备了Pt/ZrO 2催化剂。以Pt/ZrO 2为催化剂，SO 42-/ZrO 2-Al 2 O3固体酸为催化剂，水为溶剂，对硝基苯加氢合成对氨基苯酚进行了研究。结果表明，在不使用任何对环境有害的液体酸的情况下，获得了对氨基苯酚以及少量的苯胺和邻氨基苯酚。在最佳反应条件下，硝基苯转化率为44.8%，对氨基苯酚选择性达到74.9%。本文研究了Pt/ZrO 2催化剂和SO 42-/ZrO 2-Al 2 O3固体酸催化硝基苯加氢合成对氨基苯酚的反应。结果表明，在不使用任何对环境有害的液体酸的情况下，获得了对氨基苯酚以及少量的苯胺和邻氨基苯酚。在最佳反应条件下，硝基苯转化率为44.8%，对氨基苯酚选择性达到74.9。SO 42-/ZrO 2-Al 2 O3中Al 2 O3的含量对氨基苯酚的选择性有很大的影响。
AbstractZrO2–Al2O3binary oxide was prepared by homogeneous coprecipitation method. SO42−/ZrO2and SO42−/ZrO2–Al2O3were prepared by impregnation method and were characterized by BET, XRD and TPD. Pt/ZrO2was prepared by incipient wetness impregnation of ZrO2with an aqueous solution of H2PtCl6. Subsequently, hydrogenation of nitrobenzene to para-aminophenol over Pt/ZrO2catalyst and SO42−/ZrO2–Al2O3solid 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 Al2O3in SO42−/ZrO2–Al2O3has great influence on the selectivity to para-aminophenol.Graphical AbstractHydrogenation of nitrobenzene to para-aminophenol over Pt/ZrO2 catalyst andSO42−/ZrO2–Al2O3solid 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 Al2O3in SO42−/ZrO2–Al2O3has great influence on the selectivity to para-aminophenol.