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Date of Publication:2014-01-01

Journal:Chinese Journal of Chemical Engineering

Volume:22

Issue:09

Page Number:1016-1020

Abstract:The structured lipids are produced through sn-1,3-specific interesterification of soybean oil with medium-chain triacylglycerol（MCT） in continuous reactions catalyzed by Thermomyces lanuginose lipase（Lipozyme TL IM）.Cheap Lipozyme TL IM presents similar interesterification degree（ID）, sn-1,3-specificity and residual activity as expensive Rhizomucor miehei in batch reactions. In packed-bed interesterification of soybean oil with MCT catalyzed by Lipozyme TL IM, the residence time has a significant effect on ID, while temperature has a small effect at45–70 °C. The sn-1,3-specificity of Lipozyme TL IM is not satisfactory when reaction temperature is higher than60 °C. The optimal residence time and temperature are 30–40 min and 55 °C, respectively. Among the solvents,including acetone, isopropanol, tert-butanol, and isobutanol, used to recover the activity of the used Lipozyme TL IM, acetone is the most suitable one than the other solvents.

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