Titania supported silicotungstic acid: An efficient solid acid catalyst for veratrole acylation

Titania supported silicotungstic acid (STA) with different STA loading (10–25wt%) and calcination temperature (650–750°C) were prepared by wet impregnation method. The catalysts have been represented by a general formula xSTiO2y (where x denotes wt%, S denotes STA and y denotes calcination temperatu...

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Veröffentlicht in:Catalysis communications Jg. 9; H. 10; S. 2026 - 2029
Hauptverfasser: Waghmare, Nilesh G., Kasinathan, Palraj, Amrute, Amol, Lucas, Nishita, Halligudi, S.B.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 10.06.2008
Schlagworte:
Acetic anhydride
Acylation
Silicotungstic acid
Titania
Veratrole
Silicotungstic acid
Veratrole
Titania
Acetic anhydride
Acylation
ISSN:1566-7367, 1873-3905
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Zusammenfassung:Titania supported silicotungstic acid (STA) with different STA loading (10–25wt%) and calcination temperature (650–750°C) were prepared by wet impregnation method. The catalysts have been represented by a general formula xSTiO2y (where x denotes wt%, S denotes STA and y denotes calcination temperature in °C). These catalysts were characterized by techniques such as X-ray diffraction, surface analysis, FTIR–pyridine and TPD–NH3 and were used as heterogeneous solid acid catalysts in the liquid phase acylation of veratrole with acetic anhydride (Ac2O). It was found that 20STiO2700 gave the highest activity in acylation reaction due to its highest acidity.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2008.03.043