专业从事离子液体的合成、应用及其相关技术的研究工作----Lanzhou Greenchem ILs/青岛奥立科

题名

[Wiley数据库][2012]Preliminary extration of tannins by 1-butyl-3-methylimidazole bromide and its subsequent removal from Galla chinensis extract using macroporous resins

参考引用方式

Chunxia Lu, Xiaoling Luo, Liliang Lu1, Hongmin Li, Xia Chen, Yong Ji. Journal of Separation Science, Volume 36, Issue 5, March 2013 , Pages 959–964

研究机构

新疆农业科学院

所涉及离子液体

1-丁基-3-甲基咪唑溴盐       85100-77-2

研究领域

单宁提取；离子液体；大孔吸附树脂

论文摘要

In recent years, ionic liquids have become increasingly attractive as “green solvents” used in the extraction of bioactive compounds from natural plant. However, the separation of ionic liquid from the target compounds was difficult, due to their low vapour pressure and high stabilities. In our study, ionic liquid-based ultrasonic and microwave-assisted extraction was used to obtain the crude tannins, then the macroporous resin adsorption technology was further employed to purify the tannins and remove the ionic liquid from crude extract. The results showed that XDA-6 had higher separation efficiency than other tested resins, and the equilibrium experimental data were well-fitted to Langmuir isotherms. Dynamic adsorption and desorption were performed on XDA-6 packed in glass columns to optimize the separation process. The optimum conditions as follows: the ratio of column height to diameter bed was 1:8, flow rate 1BV/h, 85% ethanol was used as eluant while the elution volume was 2BV. Under the optimized conditions, the adsorption and desoption rate of tannins in XDA-6 were 94.81% and 91.63% respectively. The content of tannins was increased from 70.24% in Galla chinensis extract to 85.12% with a recovery of 99.06%. The result of UPLC-MS/MS analysis showed that [bmim]Br could be removed from extract.

关键词

Ionic liquid; Macroporous resins; Galla chinensis; Tannins