| 微波动态循环阶段连续逆流提取二氢杨梅素 |
| |
| 引用本文： | 李卫,郑成,宁正祥.微波动态循环阶段连续逆流提取二氢杨梅素[J].化工学报,2006,57(2):376-379. |
| |
| 作者姓名： | 李卫 郑成 宁正祥 |
| |
| 作者单位： | 华南理工大学轻工与食品学院，广东 广州 510640;湖北工业大学化学与环境工程学院，湖北 武汉 430068;广州大学化学化工学院，广东 广州 510091 ; |
| |
| 基金项目： | 广东省教育厅自然科学基金
,
广东省科技厅科技计划 |
| |
| 摘 要： | 引言 微波提取是一项新型的中药有效成分提取技术,具有加热速度快、能耗低、提取效率高等优点1-3].动态循环阶段连续逆流提取是一种增大传质推动力、提高提取效率的提取技术4].它是将多个提取单元科学组合,使单位时间内固液两相保持较高的浓度差,从而提高提取效率.
|
| 关 键 词： | 微波提取 动态循环阶段连续逆流提取 二氢杨梅素 藤茶 动力学模型 |
| 文章编号： | 0438-1157（2006）02-0376-04 |
| 收稿时间： | 05 17 2005 12:00AM |
| 修稿时间： | 2005-05-172005-11-09 |
Extraction of dihydromyricetin by MDMCE |
| |
| LI Wei,ZHENG Cheng,NING Zhengxiang.Extraction of dihydromyricetin by MDMCE[J].Journal of Chemical Industry and Engineering(China),2006,57(2):376-379. |
| |
| Authors: | LI Wei ZHENG Cheng NING Zhengxiang |
| |
| Affiliation: | 1. School of Light Industry and Food Technology, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. School of Chemical and Environmental Engineering, Hubei University of Technology, Wuhan 430068, Hubei, China School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510091, Guangdong, China |
| |
| Abstract: | The process which microwave is applied to dynamic multi-stage countercurrent extraction,namely the process of microwave dynamic multi-stage countercurrent extraction (MDMCE),for extracting dihydromyricetin from Ampelopsis grossedentata was investigated.Comparison of MDMCE and microwave static batch extraction (MSBE) demonstrated that both the driving force of mass transfer and extraction efficiency of MDMCE were higher than those of MSBE.The optimum extraction conditions of 5 stages MDMCE obtained by orthogonal design were as follows：10 min extracting time for 5 stages MDMCE（2 min for every stage）, 110 ℃, 1∶30 material to solvent ratio, 600 W microwave power. Under these conditions the extraction yield of dihydromyricetin and percentage of dihydromyricetin in residue were 92.2 % and 3.1% respectively. A kinetic model of single vessel for MDMCE was developed and the functional relation between dihydromyricetin concentration and extraction time was ln(ΔC)=0.2985lnt-12.52. |
| |
| Keywords: | microwave extraction dynamic multi-stage countercurrent extraction dihydromyricetin Arnpelopsis grossedentata kinetic model |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载全文 |
