| Study on Aldol Condensation of HCHO and CH3 CHO over MgO Catalysts Modified by Lanthanum and Cerium |
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| 引用本文： | 王幸宜,李春香,杨菊群. Study on Aldol Condensation of HCHO and CH3 CHO over MgO Catalysts Modified by Lanthanum and Cerium[J]. 中国稀土学报(英文版), 2004, 22(6): 848-853 |
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| 作者姓名： | 王幸宜 李春香 杨菊群 |
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| 作者单位： | LaboratoryforAdvanceelMeterials;ResearchInstituteofIndustrialCatalysis,EastChinaUniversityofScienceandTechnology,Shanghai200237,China |
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| 摘 要： | Aldol condensation of HCHO and CH3CHO over MgO, modified MgO and Al2O3 with rare earth oxides,was studied. The measurement of adsorption of pyrrole on catalysts by in-situ FT-IR and NH3 TPD indicated thatthe addition of elements La or Ce into MgO increased the acidity of the solid. In-situ FI‘-IR showed that the activation of - C = O in HCHO adsorbed on CeO-MgO and La2O3-MgO occurred. The measurement of catalytic activity implied that the modified catalysts can promote the formation of pentaerythritol, dipentaerthritol and tripentaerythritol.
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| 关 键 词： | 丁间醇醛浓缩 甲醛 乙醛 稀土元素 镧 |
Study on Aldol Condensation of HCHO and CH3CHO over MgO Catalysts Modified by Lanthanum and Cerium |
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| Wang Xingyi,Li Chunxiang,Yang JuqunLaboratory for Advanceel Meterials, Research Institute of Industrial Catalysis,East China University of Science and Technology,Shanghai ,China). Study on Aldol Condensation of HCHO and CH3CHO over MgO Catalysts Modified by Lanthanum and Cerium[J]. Journal of Rare Earths, 2004, 22(6): 848-853 |
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| Authors: | Wang Xingyi Li Chunxiang Yang JuqunLaboratory for Advanceel Meterials Research Institute of Industrial Catalysis East China University of Science Technology Shanghai China) |
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| Affiliation: | Wang Xingyi~*,Li Chunxiang,Yang JuqunLaboratory for Advanceel Meterials, Research Institute of Industrial Catalysis,East China University of Science and Technology,Shanghai 200237,China) |
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| Abstract: | Aldol condensation of HCHO and CH3CHO over MgO, modified MgO and Al2O3 with rare earth oxides, was studied. The measurement of adsorption of pyrrole on catalysts by in-situ FT-IR and NH3 TPD indicated that the addition of elements La or Ce into MgO increased the acidity of the solid. In-situ FT-IR showed that the activation of-C=O in HCHO adsorbed on CeO-MgO and La2O3-MgO occurred. The measurement of catalytic activity implied that the modified catalysts can promote the formation of pentaerythritol, dipentaerthritol and tripentaerythritol. |
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| Keywords: | aldol condensation formaldehyde acetaldehyde MgO Al2O3 cerium lanthanum rare earths |
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