| 马祥英.La2O3/γ-Al2O3在柠檬醛与丙酮缩合反应中的催化性能研究[J].分子催化,2014,(3):251-258 |
| La2O3/γ-Al2O3在柠檬醛与丙酮缩合反应中的催化性能研究 |
| Study on Catalytic Performances of La2O3/?γ-Al2O3 in Reaction of Citral and Acetone |
| 投稿时间：2014-03-08 修订日期：2014-04-20 |
| DOI： |
| 中文关键词: 柠檬醛 丙酮 La2O3/?-Al2O3 Aldol 缩合反应 假性紫罗兰酮 |
| 英文关键词:Citral Acetone La2O3/?-Al2O3 Aldol Condensation Reaction Pseudoionone |
| 基金项目: |
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| 摘要点击次数: 1296 |
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| 中文摘要: |
| 用La2O3负载量不同的La2O3/ ?-Al2O3催化柠檬醛和丙酮反应，采用GS/MS、LC/MS、13C NMR等方法鉴定反应产物，并研究了La2O3负载量对反应产物分布、La2O3/ ?-Al2O3催化剂的结构性质和酸碱性质的影响。得出以下结论：La2O3是以无定形态负载在?-Al2O3上；随着La2O3负载量的增加，催化剂比表面积减少，孔径分布趋于均一且对该反应的选择性提高。La2O3/ ?-Al2O3表面增加的中强碱位点密度有利于PSI选择性提高；而强碱位点的形成和密度增加对柠檬醛自身缩合生成PCS有促进作用。 |
| 英文摘要: |
| In paper, some research results are published on condensation reaction of citral and acetone catalyzed by La2O3/?-Al2O3 with different La2O3 loading capacity. Those include identification for reaction products by various techniques as GS/MS, LC/MS and 13C NMR; influence of La2O3 loading capacity on reaction product distribution, structure and textile properties and surface acid and basic characters of La2O3/?-Al2O3 samples. Given conclusions have that La2O3 shows amorphous state on all La2O3/?-Al2O3 samples; with increasing La2O3 loading ,the surface area of La2O3/?-Al2O3 is decreasing，the pore size tends to be more uniform and selectivity is improving for the reaction. The increasing middle strong basic sites density are beneficial to the PSI selectivity, and the formation and increasing strong basic sites density promote the self – condensation of citral molecule to product PCS on La2O3/?-Al2O3 samples. |
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