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Indexed by:期刊论文

Date of Publication:2014-09-01

Journal:CHINESE JOURNAL OF CHEMICAL ENGINEERING

Included Journals:SCIE、EI、ISTIC、Scopus

Volume:22

Issue:9

Page Number:1016-1020

ISSN No.:1004-9541

Key Words:Sn-1,3-specificity; Interesterification; Thermomyces lanuginose lipase; Medium-chain triacylglycerol; Structured lipids

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 LipozymeTL IM, the residence time has a significant effect on ID, while temperature has a small effect at 45-70 degrees C. The sn-1,3-specificity of Lipozyme TL IM is not satisfactory when reaction temperature is higher than 60 degrees C. The optimal residence time and temperature are 30-40 min and 55 degrees 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. (c) 2014 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.