| 共沉淀法制备的镁铝氧化物催化剂上丙酮气相缩合反应 |
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| 引用本文： | 马春香,刘钢,朱万春,王丽霞,李宇菲,张文祥,贾明君.共沉淀法制备的镁铝氧化物催化剂上丙酮气相缩合反应[J].高等学校化学学报,2009,30(12):2429-2433. |
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| 作者姓名： | 马春香 刘钢 朱万春 王丽霞 李宇菲 张文祥 贾明君 |
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| 作者单位： | 吉林大学化学学院,吉林省表面和界面化学重点实验室,长春,130012 |
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| 基金项目： | 国家自然科学基金，吉林省科技发展计划项目 |
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| 摘 要： | 采用共沉淀法, 以氨水为沉淀剂制备了一系列具有不同Mg/Al摩尔比的镁铝氧化物催化剂, 考察了它们在丙酮气相缩合反应中的催化性能, 并通过XRD, XPS, ICP, TG-DTA和TPD等手段对催化剂的结构和性质进行了表征. 实验结果表明, 以反滴沉淀方式制备的Mg1.0AlO催化剂具有较高的反应活性和稳定性, 在反应温度为573 K条件下, 反应85 h后丙酮的转化率仍可以达到65%. 镁铝氧化物表面存在一定量强度和密度相互匹配的弱碱和强碱中心对提高催化剂的活性和稳定性有利.
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| 关 键 词： | 丙酮 醇醛缩合 异佛尔酮 镁铝氧化物 |
| 收稿时间： | 2009-03-30 |
Gas-phase Aldol Condensation of Acetone over Mg-Al Oxides Prepared by Co-precipitation Methods |
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| MA Chun-Xiang,LIU Gang,ZHU Wan-Chun,WANG Li-Xia,LI Yu-Fei,ZHANG Wen-Xiang,JIA Ming-Jun.Gas-phase Aldol Condensation of Acetone over Mg-Al Oxides Prepared by Co-precipitation Methods[J].Chemical Research In Chinese Universities,2009,30(12):2429-2433. |
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| Authors: | MA Chun-Xiang LIU Gang ZHU Wan-Chun WANG Li-Xia LI Yu-Fei ZHANG Wen-Xiang JIA Ming-Jun |
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| Institution: | MA Chun-Xiang,LIU Gang,ZHU Wan-Chun,WANG Li-Xia,LI Yu-Fei,ZHANG Wen-Xiang,JIA Ming-Jun(Key Laboratory of Surface and Interface Chemistry of Jilin Province,College of Chemistry,Jilin University,Changchun 130012,China) |
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| Abstract: | Mg-Al oxide catalysts were prepared by co-precipitation method,used ammonia as the precipitating agent.The catalytic performances of these materials were investigated in the gas-phase Aldol condensation of acetone to isophorone.The structure and surface properties of the catalysts were characterized by means of XRD,XPS,ICP,TG-DTA and TPD.The Mg1.0AlO catalyst prepared by back-titration shows relatively high activity and stability,the conversion of acetone maintains at 65% even after 85 h at 573 K.The co-exi... |
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| Keywords: | Acetone Aldol condensation Isophorone Mg-Al oxide |
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