| Mg-Al水滑石的制备及其对Aldol缩合反应的研究 |
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| 引用本文： | 贺昌荣,孙波,田惠芸,刘连遵,裘国俊.Mg-Al水滑石的制备及其对Aldol缩合反应的研究[J].天津理工大学学报,2011,27(2):82-88. |
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| 作者姓名： | 贺昌荣 孙波 田惠芸 刘连遵 裘国俊 |
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| 作者单位： | 天津理工大学化学化工学院,天津,300384 |
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| 基金项目： | 天津市科技型中小企业技术创新基金 |
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| 摘 要： | 采用共沉淀法制备了Mg-Al摩尔比为2:1及3:1的Mg-Al水滑石,通过FT-IR、XRD、TG-DTA对合成的水滑石进行了表征,并以其为催化剂前驱体经高温焙烧后得到MgO-Al2O3复合氧化物(LDO).研究了该复合氧化物(LDO)在环戊酮和正戊醛Aldol缩合反应中的催化性能.结果表明:Mg-Al摩尔比为3:1的水滑石在焙烧温度为500℃,酮醛摩尔比为3:1,催化剂用量为反应物总量的8%,于回流下(约122℃)反应4 h,生成的2-亚戊基环戊酮占生成物百分比为85.2%,正戊醛转化率为99.0%,催化活性高于MgO和Al2O3.
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| 关 键 词： | Aldol缩合 水滑石 环戊酮 正戊醛 2-亚戊基环戊酮 |
Preparation of Mg-AI hydrotalcite and its application to Aldol condensation |
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| HE Chang-rong,SUN Bo,TIAN Hui-yun,LIU Lian-zun,QIU Guo-jun.Preparation of Mg-AI hydrotalcite and its application to Aldol condensation[J].Journal of Tianjin University of Technology,2011,27(2):82-88. |
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| Authors: | HE Chang-rong SUN Bo TIAN Hui-yun LIU Lian-zun QIU Guo-jun |
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| Institution: | (School of Chemistry and Chemical Engineering,Tianjin University of Technology,Tianjin 300384,China) |
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| Abstract: | Mg-Al hydrotalcite with Mg-Al molar ratios of 2∶1 and 3∶1 was prepared by low saturated coprecipitation,the products were characterized by FT-IR,XRD,TG-DTA.MgO-Al2O3 LDO was obtained from the calcination of the hydrotalcite precursor.And aldol condensation of cyclopentanone and valeraldehyde was studied by the catalyst of LDO.The optimal conditions are as follows: Mg-Al molar ratio 3∶1,calcination temperature 500 ℃,ketone/aldehyde molar ratio 3∶1,the amount of catalyst 8% of the total reactant,under the reflux(about 122 ℃) for 4 hours.And the percentage of 2-pentyledene cyclopentanone in the total products is 85.2%,conversion of valeraldehyde is 99.0%,the catalytic activity is higher than MgO and Al2O3. |
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| Keywords: | aldol condensation hydrotalcite cyclopentanone valeraldehyde 2-pentylidene cyclopentanone |
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