高温气相色谱法分析油脂随机酯交换反应程度研究

以大豆油和极度氢化棕榈油为原料进行酯交换反应,利用高温气相色谱法分析反应前后各种三酰甘油组成的变化,研究了不同催化剂催化酯交换反应的酯交换率,从而评判催化剂催化效果。采用此方法,利用单因素试验对Lipozyme 435脂肪酶催化大豆油与极度氢化棕榈油酯交换的参数进行了研究,得到适合的反应条件为:反应温度90℃、反应时间4 h、加酶量4%(占油脂总质量)、大豆油与氢化棕榈油质量比4∶3。在此条件下反应随机酯交换率为98.3%。

Analysis of the Degree of Oil Random Interesterification by High Temperature Gas Chromatograph

This research studied the catalytic interesterification of soybean oil with fully hydrogenated palm oil. High temperature gas chromatograph was employed to investigate the degree of interesterification. The reaction conditions using Lipozyme 435 as the catalyst was optimized by single factor experiments, giving the following optimum conditions: reaction temperature 90 °C, reaction time 4 h, enzyme dosage 4 wt% (of the total oil mass), and the mass ratio of soybean oil to fully hydrogenated palm oil 4:3. Under these conditions, the rate of random interesterification was 98.3%.