| Keggin结构磷钼钒酸催化苯直接羟基化 |
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| 引用本文： | 翟庆辉,刘欢,顾婷婷,刘丽君,崔庆新.Keggin结构磷钼钒酸催化苯直接羟基化[J].聊城师院学报,2014(2):52-55,107. |
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| 作者姓名： | 翟庆辉 刘欢 顾婷婷 刘丽君 崔庆新 |
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| 作者单位： | 聊城大学化学化工学院,山东聊城252059 |
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| 基金项目： | 国家自然科学基金（21101086）和聊城大学大学生科技文化创新基金（SF2013073） |
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| 摘 要： | 采用乙醚反萃取方法制备磷钼钒酸催化剂H3＋nPMo12-nVnO40（n=0～5）,利用X射线粉末衍射（XRD）、红外（FTIR）以及等离子体原子发射光谱法（ICP-AES）对催化剂进行表征,并以H2O2为氧化剂,考察催化剂对苯直接羟基化反应的催化性能,探讨不同钒原子数目对所制备磷钼钒酸催化活性的影响,研究了反应时间、催化剂用量、H2O2用量等对催化反应的影响.结果表明,合成磷钼钒酸催化剂具有典型的Keggin结构,钒原子取代数目对催化剂的催化活性有明显影响,其中H7PMo8V4O40表现出最高的催化活性,在实验优化条件下,苯直接羟基化为苯酚的收率达到19.5％.
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| 关 键 词： | 杂多酸 苯 羟基化 苯酚 |
Catalytic Hydroxylation of Benzene to Phenol by Keggin-type Molybdovanadophosphoric Heteropoly Acid |
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| ZHAI Qing-hui,LIU Huan,GU Ting-ting,LIU Li-jun,CUI Qing-xin.Catalytic Hydroxylation of Benzene to Phenol by Keggin-type Molybdovanadophosphoric Heteropoly Acid[J].Journal of Liaocheng Teachers University(Natural Science Edition),2014(2):52-55,107. |
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| Authors: | ZHAI Qing-hui LIU Huan GU Ting-ting LIU Li-jun CUI Qing-xin |
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| Institution: | (School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China) |
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| Abstract: | A serial of heteropoly acids catalysts H3＋nPMo12-nVnO40 with different amounts of V and Mo have been prepared by ether antixtraction method and charactered with XRD, IR and ICP-AES methods, and the catalytic activity of these catalysts was evaluated in the hydroxylation of benzene to phenol with H2O2 as oxidant. The effects of various parameters on hydroxylation were tested, which included reaction time, catalyst amount and reactants ratio. Results indicated that these molybdovan- adophosphates catalysts had the Keggin-type structure. The amount of V in catalyst has obvious influence on the catalytic activity, and HTPMo8V4O40 exhibited the best catalytic activity. The yield of phe nol could reach 19.5% at optimal reaction conditions. |
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| Keywords: | heteropoly acid benzene hydroxylation phenol |
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