Synthesis of Symmetric Ethers Using Monocationic and Dicationic Acidic Ionic Liquids

A series of monocationic and dicationic -SO3H functionalized Brønsted acidic ionic liquids (BAILs) are synthesized using different amines int.al., N,N,N′,N′-tetramethylethylenediamine, 1-methylimidazole, pyridine and alkylating agents 1,3-propane- and 1,4-butanesultones. The Hammett acidity (H0) and...

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Bibliographic Details
Published in:Key engineering materials 2018-02, Vol.762, p.104-108
Main Authors: Eglīte, Ance, Balode, Marta Anda, Prikšāne, Anda, Pudnika, Linda
Format: Article
Language:English
Subjects:
Alcohols
Aliphatic compounds
Alkylation
Amines
Decanol
Dehydration
Ethers
Ionic liquids
Ions
Octanol
Optimization
Solvents
Thermodynamic properties
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Summary:A series of monocationic and dicationic -SO3H functionalized Brønsted acidic ionic liquids (BAILs) are synthesized using different amines int.al., N,N,N′,N′-tetramethylethylenediamine, 1-methylimidazole, pyridine and alkylating agents 1,3-propane- and 1,4-butanesultones. The Hammett acidity (H0) and thermal properties by TG-DSC techniques are investigated. These ionic liquids have been applied to catalyze the dehydration reaction of aliphatic long chain alcohols (1-heptanol, 1-octanol, 1-decanol) at 195 °C. The optimization of reaction conditions and use of dicationic ionic liquids allow to reach rather high yields of symmetric diheptyl ether and dioctyl ether. The reusability of ionic liquids is evaluated using monocationic [PyPS][HSO4], dicationic [TMEDAPS][HSO4] ionic liquids and 1-heptanol.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.762.104