| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 210585 | Fuel Processing Technology | 2015 | 5 Pages |
P-methyl acetephenone synthesis from toluene and acetic anhydride over HPW(H3PW12O40)/TiO2 was carefully studied, and catalysts were characterized by BET, XRD and NH3-TPD. The characterized results displayed that the interaction between HPW and TiO2 prevented the loss of acidic protons from HPW to form the weak Lewis acid sites over HPW/TiO2. The weak acid sites over HPW/TiO2 came into being in case of much more HPW being loaded onto TiO2 or HPW/TiO2 being calcined at high temperature. The reaction results suggest that p-methyl acetephenone yield and selectivity depended on the acidity of catalysts, and the appearance of weak Lewis acid sites over HPW/TiO2 resulted in p-methyl acetephenone yield decline.
Graphical abstractNH3-TPD profiles of HPW/TiO2 with different loading calcined at 300 °C for 3 h: a TiO2, b 20.0 wt.% HPW/TiO2, c 30.0 wt.% HPW/TiO2, d 35.0 wt.% HPW/TiO2, e 50.0 wt.% HPW/TiO2.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► P-methyl acetephenone was synthesized from toluene and acetic anhydride over HPW(H3PW12O40)/TiO2. ► HPW/TiO2 was characterized by BET, XRD and NH3-TPD. ► The appearance of weak Lewis acid sites resulted in the decline of p-methyl acetephenone yield. ► The strong Bronsted sites over HPW/TiO2 were responsible for high selective p-methyl acetephenone synthesis.
