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目的:建立超临界CO2流体萃取三七脂溶性成分的动力学模型,优化萃取工艺。方法:对超临界CO2流体萃取三七脂溶性成分的过程进行数值模拟,运用质量守恒微分方程建立动力学模型,Mathmatica 6.0数学软件为数值模拟平台,对模型进行计算预测,并与实验结果比较。结果:建立了超临界CO2流体萃取三七脂溶性成分的动力学模型,模型预测结果与实验过程基本吻合,反映的趋势也与实验结果相一致,将前期实验萃取工艺参数中萃取时间由2.0 h优化为1.0 h。结论:该模型能较好地阐明三七脂溶性成分在萃取过程中的溶解传质机理,反映实际萃取过程,同时也为超临界CO2流体萃取工艺的优化和工业化放大提供了一定的理论指导。
Objective: To establish a kinetic model for the extraction of liposoluble components of Panax notoginseng by supercritical CO2 fluid and to optimize the extraction process. Methods: The process of extraction of liposoluble components of Panax notoginseng by supercritical CO2 fluid was numerically simulated. The kinetic model was established by using conservation of mass differential equations. Mathmatica 6.0 was used as the numerical simulation platform. The model was calculated and compared with the experimental results. Results: The kinetic model for the extraction of liposoluble components in Panax notoginseng by supercritical CO2 fluid was established. The model predictions were in good agreement with the experimental ones, and the trend of the model was also consistent with the experimental results. The extraction time of the extraction parameters from the previous experiment was 2.0 h Optimized to 1.0 h. CONCLUSION: This model can better elucidate the mechanism of dissolution and mass transfer of liposoluble components in Radix notoginseng during the extraction process, and reflect the actual extraction process. It also provides some theoretical guidance for the optimization and industrialization of the supercritical CO2 fluid extraction process.