Study on Aldol Condensation of HCHO and CH3CHO over MgO Catalysts Modified by Lanthanum and Cerium
来源期刊：JOURNAL OF RARE EARTHS2004年第6期
论文作者：王幸宜 杨菊群 李春香
Key words：aldol condensation; formaldehyde; acetaldehyde; MgO; Al2O3; cerium; lanthanum; rare earths;
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.
王幸宜1，杨菊群1，李春香1
(1.Laboratory for Advanceel Meterials;
2. Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China)
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.
Key words:aldol condensation; formaldehyde; acetaldehyde; MgO; Al2O3; cerium; lanthanum; rare earths;
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