超临界CO2流体萃取牡丹籽油工艺的研究  

Supercritical CO2 Fluid Extraction of Peony Seed Oil

作　　者：赵菁菁 田刚 姜天宇 雷梦蝶 孙柯魏 程世平 Zhao Jingjing;Tian Gang;Jiang Tianyu;Lei Mengdie;Sun Kewei;Cheng Shiping(School of Chemical and Environmental Engineering,Pingdingshan University,Pingdingshan 467000)

机构地区：[1]平顶山学院化学与环境工程学院,平顶山467000

出　　处：《中国粮油学报》2021年第1期131-135,154,共6页Journal of the Chinese Cereals and Oils Association

基　　金：2019年平顶山学院省级大学生创新创业项目(S201910919019)。

摘　　要：牡丹籽中含有丰富的脂肪酸。采用混合均匀设计法优化超临界CO2流体萃取牡丹籽油工艺,主要考察萃取温度、萃取压力、分离温度、分离压力、萃取时间以及原料装填量对牡丹籽油得率的影响。根据实验结果,建立模型方程,分析得到优化的工艺条件为:萃取温度45℃、萃取压力32 MPa、萃取时间2.8 h,分离温度35℃,分离压力11.5 MPa,原料装填量为187 g,在此条件下,牡丹籽油的得率达到19.54%。分别采用Esquivel和Nguyen两种萃取经验模型描述萃取过程,Nguyen模型能够很好地描述萃取过程,说明萃取过程为内扩散为控制,可近似为一级动力学传质-平衡过程。分析检测所得牡丹籽油成分发现,其中亚麻酸含量达到41.4%,亚油酸含量为27.4%,油酸含量为23.2%,总不饱和脂肪酸含量达到92.3%。Peony seeds are rich in fatty acids.The process of supercritical CO 2 fluid extraction of peony seed oil was optimized through mixed uniform design.The effects of extraction temperature,extraction pressure,separation temperature,separation pressure,extraction time and raw material loading on the yield of peony seed oil were investigated in this study.According to the experimental results,the model equation was established;the optimized process conditions were as follows:extraction temperature 45℃,extraction pressure 32 MPa,extraction time 2.8 h,separation temperature 35℃,separation pressure 11.5 MPa,and raw material loading 187 g.Under these conditions,the yield of peony seed oil reached 19.54%.Two empirical extraction models,Esquivel and Nguyen,were used to describe the extraction process.The extraction process can be reasonably described with Nguyen model,showing that the extraction process was controlled by internal diffusion and can be approximately a first-order dynamic mass transfer equilibrium process.The results showed that the content of linolenic acid was 41.4%,linoleic acid 27.4%,oleic acid 23.2%,and total unsaturated fatty acid 92.3%.

关 键 词：超临界CO2 流体 牡丹籽油 萃取工艺 混合均匀设计 传质模型 

分 类 号：TS224.4[轻工技术与工程—粮食、油脂及植物蛋白工程]