超临界二氧化碳萃取藿香梗浸膏最佳工艺条件的数学模型

The Mathematical Model of the Optimal Technological Conditions for Extraction of the Patchouli Stem Extract by Supercritical Carbon Dioxide Fluid

通过运用超临界二氧化碳萃取技术萃取藿香梗浸膏,考察萃取时间、CO_2流量、萃取温度以及萃取压力这4个因素对藿香梗浸膏萃取率的影响。对这4个因素分别进行多次单因素试验,用单因素试验数据结果进行相关正交试验并得到相应试验数据。利用统计学方法和数学试验软件,对单因素试验数据和相关正交试验数据进行多元二次多项式函数拟合,并对每次拟合结果进行数据分析以便对下一次数学实验中的变量因子进行取舍,经过多次二次多项式函数拟合,最终得到以萃取时间、CO_2流量、萃取温度以及萃取压力这4个因素为变量的萃取率的最佳二次多项式函数模型,利用这个多元二次多项式函数模型计算出超临界二氧化碳萃取藿香梗浸膏的最佳工艺条件和相应萃取率。

The effects of extracting pressure, extracting temperature, extracting time and CO2 flow rate on the process of patchouli stem extract by supercrltieal carbon dioxide fluid are investigated. Single factor experiment and orthogonal experiment are designed for four factors respectively. The corresponding experiments data have been used to fit multiple polynomials, and the variables in the polynomials have been estimated to decide whether delete or not. The optimal multiple polynomials model has been obtained by mathematical experiments which uses extraction time, C02 flow, extraction temperature and extraction pressure as variables, and the optimal technological conditions of extraction can be computed.