Aluminum phosphate-based solid acid catalysts: Facile synthesis, characterization and their application in the esterification of propanoic acid with n-butanol

作者：Liu, Boliang; Jiang, Pingping^*; Zhang, Pingbo; Zhao, Hui; Huang, Jie

来源：Comptes Rendus Chimie, 2017, 20(5): 540-548.

DOI：10.1016/j.crci.2016.07.006

• Sulfated aluminum phosphate
• Esterification
• Synthesis
• Characterization
• Catalytic performance

Novel solid acid catalysts synthesized from aluminum phosphate were prepared via a precipitation method and a subsequent sulfating treatment. Their catalytic performances for the esterification of propanoic acid with n-butanol were investigated. The as-prepared catalysts were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption desorption, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), temperature programmed desorption of ammonia (NH3-TPD), infrared spectroscopy of adsorbed pyridine, and other techniques. Experimental results of esterification reactions indicated that the calcination temperature can significantly affect the catalytic performances and the catalyst calcined at 500 degrees C (SO42-/AlPO4-500) exhibited the highest activity. The effects of different reaction conditions including reaction time, reaction temperature, catalyst amount and alcohol/acid molar ratio were studied in detail. The maximum propanoic acid conversion of 91% was achieved under optimum reaction conditions. Furthermore, the as-prepared SO42-/AlPO4-500 catalysts were tested for their reusability in repeated reaction cycles and could be effectively regenerated by a simple reactivation method.

• 出版日期2017-5
• 单位江南大学