A comparative study on iron modified or unmodified tungstophosphoric acid supported on titania for Friedel-Crafts acylation

作者：Mu Manman; Chen Ligong; Wang Shutao^*

来源：Journal of Porous Materials, 2015, 22(5): 1137-1143.

DOI：10.1007/s10934-015-9989-6

• Acylation
• Benzoyl chloride
• Acetic anhydride
• TPA/TiO2
• FeTPA/TiO2

Tungstophosphoric acid supported on TiO2 (TPA/TiO2) and iron modified tungstophosphoric acid supported on TiO2 (Fe(0.5)TPA/TiO2 and FeTPA/TiO2) were prepared and examined for Friedel-Crafts acylation reactions. The obtained results indicated that FeTPA/TiO2 exhibited excellent catalytic performance on the acylation of m-xylene with benzoyl chloride, but inferior results were obtained in the acylation of anisole with acetic anhydride. However, TPA/TiO2 displayed better catalytic activity than others in the later reaction. All the catalysts were characterized by XRD, FT-IR, NH3-TPD, Py-IR and TGA. The obtained results demonstrated that the Lewis acidity of catalysts presented a significant influence on the reaction with benzoyl chloride as acylating agent while the total acidity of catalysts was more important with acetic anhydride as acylating agent. Finally, the reaction mechanisms with two acylating agents over the above catalysts were discussed.

• 出版日期2015-10
• 单位天津大学