花生壳中黄酮类成分加压提取工艺优化及动力学研究

Optimization and Kinetics for the Pressurized Extraction Process of Flavonoids from Peanut Hulls

为合理开发和有效利用花生壳,采用新型加压提取技术提取花生壳中黄酮类成分。在单因素实验的基础上,运用正交实验优化花生壳中黄酮类成分的提取工艺,并对其提取过程的动力学进行研究。结果表明:加压提取花生壳黄酮的最佳工艺条件为60%(体积分数)乙醇,料液比1∶20,压力0.6MPa,温度90℃,提取时间30min。动力学研究表明:加压提取过程为内部扩散,表观活化能为37.53kJ·mol^(-1)。

In order to rational exploitation and effective utilization of peanut hulls,flavonoids from the peanut hulls were extracted by pressurized liquid extraction,the effect of factors such as the ethanol concentration,ratio of material to liquid,extraction pressure,extraction temperature,and extraction time were studied and optimized,and then the extracting kinetics was studied.The optimal process conditions were obtained as follows：The ethanol concentration 60%（volume fraction）,ratio of material to liquid 1∶20,extraction pressure 0.6 MPa,the extraction temperature 90 ℃,and extraction time 30 min.The study of kinetics showed that the extraction process could be described by inner diffusion,and the apparent activation energy was 37.53 kJ·mol^-1.