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Esterification catalyzed by Brnsted acidic ionic liquid [Emim]HSO_4

Jia Hong

Abstract

The acidity of ionic liquid [Emim]HSO4 was investigated by IR spectroscopy with pyridine as probe.Ionic liquid [Emim]HSO4 was used as catalyst in the esterification of acetic acid and alcohol.The effect of reaction conditions on esterification was studied.Conversion rate of acetic acid was 76.73% and selectivity of ethyl acetate was 100% under the following optimal conditions:reaction temperature 40 ℃,reaction time 1 h,ionic liquid:reactant=1:5.The ionic liquid can be easily separated from the products.

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Key concepts: Ionic liquid, Chemistry, Acetic acid, Catalysis, Selectivity, Alcohol, Pyridine, Inorganic chemistry