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A simultaneous cooling and dielectric heating: an advanced technology to improve the yield of lactides

Idris, Ani and Bukhari, Attaullah and Mohd. Yusof, Noordin and Tan, K. G. (2012) A simultaneous cooling and dielectric heating: an advanced technology to improve the yield of lactides. Progress in Electromagnetics Research Symposium . pp. 141-145. ISSN 1559-9450

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Abstract

Lactides with improved yield are prepared by depolymerization of oligo (lactic acid) under simultaneous cooling and microwave heating. The influence of microwave power input and its non-thermal effects on the yield of lactides are investigated. By increasing microwave power input, increased yield of lactides is obtained at 180-220°C at reduced pressure. Combined application of simultaneous cooling with microwave heating further increased the lactides yield. The removal of lactides during reaction shifts the equilibrium to the right. Simultaneous cooling enhances the absorbance of microwave irradiation into reactants; though increased yield of lactides is not only due to thermal effects of microwave irradiation. Maximum 85% yield of lactides is obtained at 500W microwave power at 180-220°C and < 20 torr.

Item Type:Article
Uncontrolled Keywords:Electromagnetics
Subjects:Q Science > QC Physics
Divisions:Chemical Engineering
ID Code:46534
Deposited By: Haliza Zainal
Deposited On:22 Jun 2015 13:56
Last Modified:12 Sep 2017 15:56

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