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O-acetylation of salicylic acid with acetic anhydride over honeycomb coated with zirconia and its modified forms

M. Shyamsundar, S.Z. Mohamed Shamshuddin, S.R. Pratap, Venkatesh, T.E Mohan Kumar

Zirconia and its modified forms such as Mo(VI)/ZrO2 and Pt-SO4 2-/ZrO2 were coated on honeycomb monoliths. These materials were characterized for their, total surface acidity by NH3-TPD, crystallinity by PXRD and morphology by SEM techniques. They were then evaluated for their catalytic activity in o-acetylation of salicylic acid with acetic anhydride to synthesize acetyl salicylic acid. Honeycomb coated with zirconia and their modified forms were found to be eco-friendly, economical & efficient catalysts for o-acetylation. These catalysts were found to be reusable.