期刊
CHEMICAL ENGINEERING JOURNAL
卷 221, 期 -, 页码 99-104出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2013.01.077
关键词
Dicationic ionic liquid; Esterification; Catalyst; Bronsted acidity
资金
- National Natural Science Foundation of China [20576026, 21106032]
- College of Chemical and Pharmaceutical Engineering (Hebei University of Science and Technology)
Three kinds of imidazole based dicationic [C-2(Mim)(2)], [C-3(Mim)(2)], [C-4(Mim)(2)] with traditional counter anion HSO4- ionic liquids (Is) were synthesized. Key physicochemical properties, such as thermal stability, solubility in common solvents, acidic property and corrosion of ILs for Austenitic stainless steel 316 were determined. Esterification of alcohols by carboxylic acids has been carried out at room temperature in a group of imidazole dicationic ionic liquid. The catalytic performance was found to be much better than that of conventional non-cation functionalized ionic liquids and the corrosion was five times weaker than sulfuric acid. The esters were easily recovered due to immiscibility with the ionic liquid and reported imidazole dicationic ionic liquids were a promising catalyst for esterification reaction. (C) 2013 Elsevier B.V. All rights reserved.
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