基于响应面法脱出核桃油毛油中游离脂肪酸的研究

Study on the Isolation Process of Free Fat Acids from Crude Walnut Oil by Response Surface Method

为了得出分子蒸馏法脱出核桃油毛油中游离脂肪酸的最佳工艺,在单因素(进料速度、蒸馏温度、刮膜转速)分析基础上,运用BBD设计进行响应面分析,得出了因变量二次回归方程,并得出最佳工艺条件:进料速度250 g/h、蒸馏温度180℃、刮膜转速250 r/min。试验证明,此工艺条件可以使核桃油毛油酸值降至0.6 mg KOH/g以下,且维生素E等功效成分未破坏,过氧化值未升高,可达到1级核桃油标准对游离脂肪酸的要求。

In order to obtain the optimal Isolation Process of Free Fat Acids from Crude Walnut oil by mo-lecular distillation, the BBD design has been used to analyze the response surface, based on the analysis of the the single factor （ feeding rate, distillation temperature, wiper speed ） analysis. Then the dependent variable quadratic regression equation and the optimal process conditions have been obtained. The optimal process con-ditions are that the feeding rate is 250g/h,the distillation temperature is 180°C , the wiper speed is 250rpm. The experiment has proved that acid value of Walnut oil can reduce to 0. 6mgKOH/g, and can meet the re-quirement of a class walnut oil.