摘要
研究了用海藻酸钠固定化的脂肪酶在有机溶剂中催化乙酸与正己醇之间的酯化反应。探讨了溶剂、醇酸摩尔比、温度、底物浓度等多种因素对脂肪酶催化乙酸正己酯合成反应的影响规律。研究结果显示,在优化的条件下,即溶剂为正庚烷、醇酸摩尔比为1∶1、底物浓度为0.15mol/L、温度为70℃、pH为7.5、酶湿度为8.9%、吸水剂用量为0.20g/mL时,反应5h后,乙酸正己酯的转化率达88%。
Lipase-catalyzed synthesis of hexyl acetate by esterification between acetic acid and normal hexanol in organic solvents was studied, and the optimum condition for the esterification was investigated. The esterification reaction was carried out in n-heptane solvent at 70℃ at the substrate concentration of 0.15 mol/L and acid to alcohol molar ratio of 1：1. The 5 A molecular sieves were added to the reaction system as water adsorbent at 0.20 g per milliliter solution. Under this condition, esterification conversion rate reached 88 % after reaction for 5 hours.
出处
《食品工业科技》
CAS
CSCD
北大核心
2006年第6期144-147,共4页
Science and Technology of Food Industry
基金
安徽省优秀青年科技基金项目(04043051)
关键词
脂肪酶
非水相
酯化反应
催化
乙酸正己酯
lipase
non-aqueous media
esterification
catalysis
hexyl acetate
