摘要
德氏根霉菌(Rhizopusdelemar) 经固态发酵生产脂肪酶,以此酶为催化剂,在非水介质中合成了正戊酸异戊酯。研究了反应温度、溶剂、底物浓度、底物摩尔比、吸水剂用量等因素对酯化反应的影响,确定了正戊酸异戊酯的最佳合成条件为:反应温度为5 0℃,异辛烷为反应介质,底物浓度为0 15mol/L ,酸醇摩尔比为1∶1 4。在反应体系中需加入0 2 5 g/mL的5 分子筛,以吸收酯化反应生成的水。在优化的条件下,反应6h后,酯合成转化率达98%。
The Rhizopus delemar lipase catalyzed synthesis of isoamyl valerate in organic solvents was studied, and the optimum condition for the esterification was acquired. The esterification reaction was carried out in isooctane solvent at 50℃, with 0 15 mol/L of substrate and 1∶1 4 of acid-alcohol molar ratio The 5 ? molecular sieves were added to the reaction system as water adsorbent with 0 25 mg per milliliter solution Under this condition, esterification conversion rate reached 98% after 6 hours incubation
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2005年第4期21-24,共4页
Food and Fermentation Industries
基金
安徽省自然科学基金 (No .0 1 0 4 31 0 2 )
安徽省优秀青年科技基金(No 0 4 0 4 30 51 )资助项目
