文献类型： 外文期刊
作者： Zhou, Yang 1 ; Jia, Chengsheng 1 ; Li, Rui 2 ; Zhang, Xiaoming 1 ; He, Wensen 1 ; Li, Jingjing 1 ; Feng, Biao 1 ; Xia, Qi 1 ;
作者机构： 1.Jiangnan Univ, Sch Food Sci & Technol, State Key Lab Food Sci & Technol, Wuxi 214122, Jiangsu, Peoples R China
2.Chinese Acad Trop Agr Sci, Coconut Res Inst, Wenchang, Hainan, Peoples R China
关键词： Esterification;Fatty acids esters;Lewis acid-surfactant combined catalyst;Oxidation;Phytostanyl esters
期刊名称：EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY （ 影响因子：2.679； 五年影响因子：2.627 ）
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收录情况： SCI
摘要： Esterification of natural phytostanols with various fatty acids by using Lewis acid-surfactant combined catalyst was investigated. For synthesis of phytostanol esters of saturated fatty acids, cuprum dodecyl sulfate [Cu(DS)2] was the most desirable catalyst due to its high selectivity, reusability, activity, and less corrosivity, whereas stanol selectivity with other catalysts, such as ZnCl2 and tungstophosphoric acid. The substrate molar ratio of 1.2:1 (lauric acid/phytostanols) was the optimal. For synthesis of phytostanol esters of unsaturated fatty acids, cerium dodecyl sulfate [Ce(DS)3] was better than [Cu(DS)2] which was based on the oxidation of the unsaturated fatty acids during the reaction. The chemical structure of the sitostanyl stearate, sitostanyl oleate, and sitostanyl linoleate were confirmed by FTIR, MS, and NMR, respectively. As a result, the [Cu(DS)2] and [Ce(DS)3] were screened to synthesize phytostanyl esters of fatty acids for commercial production.
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