超临界CO_2状态下酶法合成富含中链脂肪酸的玉米油  

Enzymatic synthesis of corn oil rich in medium chain fatty acid in supercritical CO_2 state

作　　者：齐颖[1] 陈晓慧[1] 李越[1] 李志平[1] 于殿宇[1] 

机构地区：[1]东北农业大学食品学院,黑龙江哈尔滨150030

出　　处：《食品工业科技》2012年第2期300-302,306,共4页Science and Technology of Food Industry

基　　金：国家863高技术研究发展计划(2010AA101503)

摘　　要：研究了在超临界CO2状态下,采用脂肪酶催化辛酸与玉米油反应制备富含辛酸甘油酯玉米油的工艺,分别考察了酶用量、反应压力、温度和时间对辛酸酯化率的影响。最佳的工艺条件为:酶用量5%,反应温度60℃,反应时间24h,反应压力11MPa,在此条件下辛酸的酯化率可达到90.73%。反应产物的脂肪酸组成中,具有生理活性的中链脂肪酸含量高达32.00%。The preparation of corn oil rich in medium chain fatty acid by lipase-catalyzed in supercritical CO2 was studied,this response was synthesized from conjugated lipoic acid and corn oil.The effects of the quantity of enzyme,the reaction pressure, temperature and time on the esterification rate of lipoic acid were studied.The results showed that the optimal parameters were as follows ：the quantity of enzyme 5%, reaction temperature 60℃, reaction time 24h, reaction pressure 11MPa. Under these conditions, the esterification rate of lipoic acid reached 90.73%. The content of medium chain fatty acid which had physical activities was 32.00% in the products.

关 键 词：玉米油 辛酸 辛酸酯化率 脂肪酶 超临界CO2 

分 类 号：TS225.9[轻工技术与工程—粮食、油脂及植物蛋白工程]