椪柑籽油超临界提取工艺的优化

利用临界CO2萃取技术提取椪柑籽油。在单因素试验的基础上,采用Box-Behnken中心组合设计对椪柑籽油超临界CO2萃取工艺中的时间、温度、压力和流量4因素的最优化组合参数进行定量研究,得到各因素与椪柑籽油得率关系的数学模型。结果表明:最佳的工艺条件为萃取压力34.4MPa、CO2流量25.8L/h、萃取时间147.6min、萃取温度39.3℃。该条件下,椪柑籽油提取得率的理论值为45.95%,实测值为(45.12±1.36)%(n=3),说明回归模型能较好地预测椪柑籽油的提取得率。

Research and optimization on ponkan seed extracting by supercritical CO2 fluid extraction technique

The influences of time,temperature,pressure and the flux of CO2 on the yield of seed oil from its powder with the supercritical CO2 fluid extraction technique were studied according to the Box-Behnken central composite experimental design based on the single factor test.Analyzed the mathematical model which established by response surface methodology(RSM),and the same time,relationships between studied factors and response of Ponkan seed oil extraction yield were described.Based on the canonical analysis,the optimum conditions were obtained as follows: the extraction pressure is 34.4 MPa,the flow rate of CO2 25.8 L/h,the extraction time is 147.6 min and the temperature 39.3 ℃.Under the optimized extraction conditions,the predictive maximum yield of seed oil was 45.95% and the average validation value was(45.12±1.36)%(n=3),so the model could be used to predict the extraction results well.