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- Title
n-Butyl Acetate Synthesis in the Presence of Pyridinium-Based Acidic Ionic Liquids: Influence of the Anion Nature.
- Authors
Tankov, Ivaylo; Mitkova, Magdalena; Nikolova, Radoslava; Veli, Anife; Stratiev, Dicho
- Abstract
The catalytic behavior of three Brønsted acidic ionic liquids: pyridinium hydrogen sulfate ([H-Pyr][HSO]), pyridinium dihydrogen phosphate ([H-Pyr][HPO]) and pyridinium nitrate ([H-Pyr][NO]) in the esterification of acetic acid with n-butanol was compared in the current paper. The alteration in the values of acetic acid conversion and esterification rate were investigated as a function of the process parameters: catalyst nature, catalyst loading, initial molar ratio n-butanol:acetic acid and reaction temperature. The anion variety modified the acidity of the obtained samples and effected their catalytic activity as follows: [H-Pyr][NO] < [H-Pyr][HPO] < [H-Pyr][HSO]. The increasing of both catalyst loading and reaction temperature led to higher values of acetic acid conversion and esterification rate. The existence of a positive linear relationship between the esterification rate and acetic acid concentration was observed. The increasing of the n-butanol concentration negatively affected the rate of esterification. The acetic acid conversion was improved as the initial molar ratio n-butanol-to-acetic acid was raised. Graphical Abstract:
- Subjects
BUTYL acetate; PYRIDINIUM compounds; IONIC liquids; ANIONS; SULFURIC acid; ACETIC acid
- Publication
Catalysis Letters, 2017, Vol 147, Issue 9, p2279
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-017-2135-0