Abstract
Two solid acid catalysts, SAC1 and SAC2, with porous structure obtained from mesoporous hard template were synthesized and characterized by Fourier transform infrared spectroscopy, acid-base titration, nitrogen adsorption/desorption, scanning electron microscopy, and their catalytic activity in esterification of carboxylic acid. Acid-base titration showed that these catalysts have acidic concentration of 1.02–1.10 mmol/g. The catalytic test in esterification of 6-bromohexanoic acid with methanol showed that SAC1 with perfluorinated sulfonic acid is catalytically more active than SAC2 with aryl sulfonic acid. In spite of lower acid loading, SAC1 showed a comparable catalytic activity with commercially available solid acid catalyst Amberlyst 15 with higher acid capacity (4.80 mmol/g) due to high acidity and well-defined pore structure. SAC1 could be recycled up to three times without significant loss in activity.
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The authors appreciate the generous support of the Rensselaer Polytechnic Institute (Bae startup) for this work.
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Park, E.J., Bae, C. Superacidic porous polymer catalyst and its application in esterification of carboxylic acid. Struct Chem 28, 493–500 (2017). https://doi.org/10.1007/s11224-016-0879-6
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DOI: https://doi.org/10.1007/s11224-016-0879-6