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Position: Home > Articles > Study on Hydrogenation of Condensed Soybean Lecithin in Supercritical CO_2 State FOOD SCIENCE 2008,29 (9) 211-214

超临界CO_2状态下氢化大豆浓缩磷脂的研究

作  者:
梁少华;马传国;王瑾;李默馨;于殿宇
单  位:
河南工业大学粮油食品学院;东北农业大学食品学院
关键词:
大豆浓缩磷脂;H2;超临界CO2;颗粒状;抗氧化性
摘  要:
在超临界CO2状态下,用Pd/C作催化剂,进行氢化大豆浓缩磷脂的加成反应。确定了高压反应釜中CO2的压力为5MPa,而后加入H2至总压力为9MPa时,二氯甲烷-乙醇混合溶剂比2:1,反应温度为65℃,反应时间为70min,搅拌速度为220r/min,催化剂添加量为3.5%,产品得率为92%,碘值为35.5gI2/100g的氢化浓缩磷脂。产品抗氧化性增强,呈颗粒状,颜色为淡黄色,有利于加工、运输、贮藏,改善了浓缩磷脂在饲料中的分散性。
译  名:
Study on Hydrogenation of Condensed Soybean Lecithin in Supercritical CO_2 State
作  者:
LIANG Shao-hua1,MA Chuan-guo1,WANG Jin2,LI Mo-xin2 ,YU Dian-yu2,(1.Henan University of Technology,Zhengzhou 450001,China; 2. College of Food Science,Northeast Agricultural University,Harbin 150030,China)
关键词:
soybean lecithin;H2;supercritical CO2;granular;anti-oxidation
摘  要:
Using Pd/C as catalyst,the hydrogenation of condensed soybean lecithin was carried out in the supercritical CO2 state. The optimal pressure of CO2 in the high-pressure reactor, total pressure after adding H2, ratio of dichloromethane to ethanol, reaction temperature, reaction time, stirring speed, amount of catalyst are determined, 5 MPa,9 MPa,2:1,65℃,70 minutes, 220 r/min and 3.5%, respectively. Under the above conditions the product yield is 92%, and iodine value of lecithin after hydrogenation is 35.5g I2/100g. The product is granular and yellowy. Its anti-oxidation is enhanced, which is benificial for processing, transportation and storage. The dispersion of condensed soybean lecithin in feed is also improved.

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