Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (12): 2429.

• Articles • Previous Articles     Next Articles

Gas-phase Aldol Condensation of Acetone over Mg-Al Oxides Prepared by Co-precipitation Methods

MA Chun-Xiang, LIU Gang, ZHU Wan-Chun, WANG Li-Xia, LI Yu-Fei, ZHANG Wen-Xiang, JIA Ming-Jun*   

  1. Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2009-03-30 Online:2009-12-10 Published:2009-12-10
  • Contact: JIA Ming-Jun. E-mail: jiamj@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20773050)和吉林省科技发展计划项目(批准号: 20060574, 20070115)资助.

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-existence of a certain amount of weak basic centers and strong basic centers on the surface Mg-Al oxides may play an important role for improving the activity and stability of these catalysts.

Key words: Acetone; Aldol condensation; Isophorone; Mg-Al oxide

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