| 合成吡啶催化剂的研究 |
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| 引用本文： | 张进,肖国民,梁衡弘.合成吡啶催化剂的研究[J].东南大学学报,2004,20(1):62-64. |
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| 作者姓名： | 张进 肖国民 梁衡弘 |
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| 作者单位： | 东南大学化学化工系，南京210096 |
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| 摘 要： | 醛(酮)氨法合成吡啶可用ZSM-5作催化剂, 本文研究了ZSM-5催化剂的表面酸性与催化合成吡啶活性之间的关系. 合成了硅铝质量比为120的ZSM-5, 并用钴、铁对其进行改性, 用吡啶红外光谱技术测定了ZSM-5的表面酸性. 研究表明用Co2 ,Fe3 离子对HZSM-5进行改性, Lewis酸中心明显减少, 对氨的吸附能力下降, 这种现象保证了足够多的酸中心暴露和醛反应, 有利于吡啶碱的形成, 吡啶碱产率可达78%. 该研究为制备高活性、高选择性的合成吡啶催化剂提供了理论依据.
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| 关 键 词： | 吡啶 催化剂 |
Study on catalyst for pyridine synthesis |
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| Zhang Jin,XIAO Guomin,Liang Henghong.Study on catalyst for pyridine synthesis[J].Journal of Southeast University(English Edition),2004,20(1):62-64. |
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| Authors: | Zhang Jin XIAO Guomin Liang Henghong |
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| Abstract: | The synthesis of pyridine from aldehydes and ammonia was performed over ZSM-5 catalyst. The catalytic activity in reaction was correlated with the acidity of the zeolite catalysts. In this study a few of ZSM-5 ( m ( SiO_2)/ m (Al_2O_3)=120) were prepared and modified with Co 2+ , Fe 3+ . The surface acidity was determined by Py-IR technique. It was found that CoZSM-5 and FeZSM-5 have fewer Lewis acid sites than HZSM-5. The decrease of Lewis acid sites leads to decreasing the ability of NH_3 adsorption, this phenomenon insures that there are adequate acid sites discovering and reacting with aldehydes. It is advantageous to the reaction. By using a CoZSM-5 catalyst, the yields of pyridine base can reach 78%. The study provides a theoretical base for preparing high activity and high selective catalyst for pyridine synthesis. |
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| Keywords: | ZSM-5 pyridine catalyst ZSM-5 |
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