What is the effect of different Lewis acidic ionic liquids on the reactivity and catalytic activity of glycerol acetalization?
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Different Lewis acidic ionic liquids have been found to have varying effects on the reactivity and catalytic activity of glycerol acetalization. The Lewis acidic ionic liquid [BuMeim][Sc2Cl7] was shown to be an excellent catalyst for the esterification of rosin and glycerol, resulting in the synthesis of rosin glyceride . Imidazolium sulfonate zwitterions (ZIs) with unconventional counter-anions were used to fabricate mesoporous silica-gel-immobilized Bronsted acid ionic liquid (SG@BAIL) nanocatalysts, which exhibited increased catalytic activities in the acetalization of glycerol with benzaldehyde . WOx-promoted TiO2-ZrO2 solid acid catalyst was found to have superior catalytic performance in the acetalization and ketalization of glycerol with carbonyl compounds . Ionic liquids with different alkyl substituents and anions were synthesized and used as catalysts for glycerin condensation, with the highest conversion achieved using 1-dodecyl-N,N,N-triethylammonium acetate . Bronsted-Lewis acidic ionic liquids were also effective catalysts for the esterification of glycerol and acetic acid, resulting in high yields of glycerol triacetate .
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