Significant influence of microwave dielectric heating on ionic liquid catalyzed transesterification of ethylene carbonate with methanol

The efficiency of microwave heating over conventional transesterification reaction and the heating characteristics of transesterification reaction mixture in the presence of ionic liquids were investigated. The microwave specific heating provided a rapid and sustainable approach for transesterificat...

Full description

Saved in:
Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 2009-04, Vol.303 (1), p.96-101
Main Authors: Dharman, Manju Mamparambath, Ju, Hye-Young, Shim, Hye-Lim, Lee, Mi-Kyung, Kim, Kyung-Hoon, Park, Dae-Won
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Dimethyl carbonate
Exact sciences and technology
General and physical chemistry
Ionic liquid
Microwave heating
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Transesterification
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The efficiency of microwave heating over conventional transesterification reaction and the heating characteristics of transesterification reaction mixture in the presence of ionic liquids were investigated. The microwave specific heating provided a rapid and sustainable approach for transesterification of ethylene carbonate with methanol. This paper reports an energy efficient route for the transesterification of ethylene carbonate (EC) with methanol using ionic liquid (IL) as catalyst through microwave heating. The influence of the reaction parameters such as the microwave irradiation time, power, EC/methanol ratio, and the cation and anion of both 1-alkyl-3-methyl imidazolium and tetraalkyl ammonium salts, was examined under these conditions. Also the heating characteristics of this reaction mixture were examined at various intervals. The coproduction of an equimolar amount of dimethyl carbonate (DMC) and ethylene glycol (EG) were obtained in high yield and better selectivity. Comparative studies were carried out under different reaction conditions with classical heating modes. An induction period observed during conventional reaction can be avoided by microwave dielectric heating. Overall, this study highlights an environmentally benign technology for the production of DMC, a “green reagent”, through microwave irradiation.
ISSN:1381-1169
1873-314X
DOI:10.1016/j.molcata.2009.01.004