| La和KF改性Y型分子筛催化丙烯醛二乙缩醛/氨合成吡啶和3-甲基吡啶 |
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| 引用本文： | 罗才武,赵勇,蒋复量,李向阳,晁自胜.La和KF改性Y型分子筛催化丙烯醛二乙缩醛/氨合成吡啶和3-甲基吡啶[J].应用化学,2018,35(5):559-563. |
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| 作者姓名： | 罗才武 赵勇 蒋复量 李向阳 晁自胜 |
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| 作者单位： | 南华大学环境与安全工程学院 湖南 衡阳 421001;湖南省铀尾矿库退役治理工程技术研究中心 湖南 衡阳 421001;长沙理工大学材料科学与工程学院 长沙 410114 |
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| 基金项目： | 国家自然科学基金 (21376068);南华大学博士科研启动基金(2016XQD36);湖南省教育厅科学研究项目(17C1361)资助 |
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| 摘 要： | 在连续流动固定床反应中,以丙烯醛二乙缩醛、水和氨为原料,合成了吡啶和3-甲基吡啶。 比较了La-和KF-改性Y型分子筛的活性大小,考察了La负载量和改性方式、KF负载量及KF/Y的焙烧温度的影响。 研究结果表明,与纯Y型分子筛相比,La和KF改性Y型分子筛均能增强催化活性。 采用浸渍法和La负载量为1%(质量分数)时,吡啶和3-甲基吡啶总收率达到最高值;与浸渍法相比,采用离子交换法制备La-Y的活性更好。 采用浸渍法、KF负载量为1%(质量分数)和KF/Y的焙烧温度为700 ℃时,吡啶和3-甲基吡啶总收率达到最大值。
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| 关 键 词： | 缩醛 甲基吡啶 吡啶 La-Y KF/Y |
| 收稿时间： | 2017-05-12 |
Synthesis of Pyridine and 3-Picoline from Acrolein Diethyl Acetal and Ammonia over La- and KF-modified Y Type Zeolite Catalysts |
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| LUO Caiwu,ZHAO Yong,JIANG Fuliang,LI Xiangyang,CHAO Zisheng.Synthesis of Pyridine and 3-Picoline from Acrolein Diethyl Acetal and Ammonia over La- and KF-modified Y Type Zeolite Catalysts[J].Chinese Journal of Applied Chemistry,2018,35(5):559-563. |
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| Authors: | LUO Caiwu ZHAO Yong JIANG Fuliang LI Xiangyang CHAO Zisheng |
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| Institution: | School of Environmental and Safety Engineering,University of South China,Hengyang,Hunan 421001,China;Hunan Engineering Research Center for Uranium Tailings Decommission and Treatment,Hengyang,Hunan 421001,China;College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China; |
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| Abstract: | The synthesis of pyridine and 3-picoline from the reaction of acrolein diethyl acetal, water and ammonia was conducted in a fixed-bed reactor. The catalytic activities of La- and KF-modified Y zeolites were compared. Various influencing parameters, including the loadings and modified ways of La species, the loadings of KF and the calcination temperature of KF/Y, were systematically investigated. Compared to pure Y zeolite, La- and KF-modifications can enhance the catalytic activities. The catalytic activity of La-modified Y through ion exchange is better than that of the sample through wet impregnation. The total yield of pyridine and 3-picoline reaches the maximum while the loading of La via the wet-impregnation method is 1% mass fraction and the calcination temperature of KF/Y is 700 ℃. |
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| Keywords: | acetal picoline pyridine La-Y KF/Y zeolite |
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