Abstract
Mixed metal oxide based solid acids like ZrO2–Al2O3 (ZA) with Al2O3 different loadings (2, 4, 6, 8 and 10 mol%) were prepared by wet impregnation method and characterized by PXRD, NH3-TPD, BET, ICP-OES, SEM, and TEM techniques. These solid acids were evaluated for their catalytic activity in the synthesis of a series of O-methoxymethylated products under solvent-free conditions at a moderate temperature in shorter reaction time (~20 min). This is achieved by various substituted alcohols and dimethoxy methane in good yields. Solid acids containing ZA used in this study exhibited good catalytic activity in the reaction. In case of 6 mol% ZA which has highest surface acidity, surface area and catalytically active tetragonal phase was found to be highest active in the O-methoxymethylation reaction up to ~99% yield. These catalysts were found to be reactivable and reusable.
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Abbreviations
- 2ZA:
-
Powder form of 2% ZrO2/Al2O3
- 4ZA:
-
Powder form of 4% ZrO2/Al2O3
- 6ZA:
-
Powder form of 6% ZrO2/Al2O3
- 8ZA:
-
Powder form of 8% ZrO2/Al2O3
- 10ZA:
-
Powder form of 10% ZrO2/Al2O3
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Acknowledgements
Authors are gratefully for the financial support (part) provided by Vision Group of Science & Tech, Govt of Karnataka (GRD-375/2014-15) and grateful to Department of Chemistry Jain University for surface area and acidity measurements and also grateful to the authorities of IISc and St. Joseph College, Bangalore for GC-MS, SEM, TEM, ICP-OES and PXRD, analysis of catalysts respectively.
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Pratap, S.R., Shyamsundar, M. & Shamshuddin, S.Z.M. Mesoporous ZrO2–Al2O3 (ZA) mixed metal oxide as an efficient and reusable catalyst for the liquid phase O-methoxymethylation reaction under solvent free conditions. J Porous Mater 25, 1265–1273 (2018). https://doi.org/10.1007/s10934-017-0537-4
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DOI: https://doi.org/10.1007/s10934-017-0537-4