摘要
本文研究在有机相中，固定化１，３－位置特异性脂肪酶ＬｉｐｏｚｙｍｅＩＭ催化棕榈油中熔点分提物（ＰＯＭＦ）与硬脂酸之间的酯交换反应；考察了反应温度、有机溶剂、酰基供体、酶浓度、水活性等因素对酯交换反应的速度和产物组成的影响．由棕榈油生产代可可脂的最佳反应条件是：ＬｉｐｏｚｙｍｅＩＭ：ＰＯＭＦ硬脂酸：正庚烷＝１：３：６：９（Ｗ％），ａｗ＝０．５５，温度６０～６５℃．
Cocoa butter substitute could be produced from palm oil mid fraction bytransesterification catalyzed by LipozymeIM Organic solvent, acyl donor, enzyme content and water activity of the reaction system made significant influence on the reactionrate and the composition of the product. The optimum condition was found to beLipozymeIM: POMF: stearic acid: n-heptane=l:3:6: 9 (w%); water activity 0.55,temperature 60～65℃.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1995年第5期104-109,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
留学回国人员基金
