超临界CO2提取绿茶中咖啡因与烟叶中的茄尼醇

生物工程论文编号:SW033  论文字数:11954,页数:23

目  录
中文摘要 Ⅰ
英文摘要. II
目  录 III
1 绪论 1
1.1 前言 1
1.2 研究进展 2
1.3 研究的目的和意义 7
2 绿茶中咖啡因与烟叶中茄尼醇的提取工艺研究 8
2.1 材料与方法 8
2.2 绿茶中咖啡因提取的实验方法 9
2.4 烟叶中茄尼醇提取的实验方法 11
2.5 本章讨论 13
3 实验结果与讨论 14
3.1 咖啡因、茶多酚的实验结果 14
3.2 茄尼醇的实验结果 16
3.3 本章讨论 16
4 结论与展望 17
致 谢 18
参考文献 19

摘要：超临界CO2萃取技术（Supercritical Fluid Extraction, 简称SFE）是近代化工分离中一种较新型的分离技术。本文应用该技术脱除绿茶中咖啡因与提取烟叶中的茄尼醇。在脱除绿茶中咖啡因时，研究了萃取压力、萃取温度、萃取时间、夹带剂使用、预处理等方面，确定了萃取体系最佳的工艺条件是：微波预处理，茶叶含水量是40%，夹带剂是30%的乙醇/水，萃取压力为40MPa，萃取温度为50℃，萃取时间为8h。采用超临界CO2萃取技术提取废次烟叶中的有效成分茄尼醇时，考察了相关因素对提取分离的影响，基本确定了萃取体系的适宜工艺条件：夹带剂乙醇体积分数为95%、萃取温度在50℃、萃取压力为20 MPa，萃取时间是2h。

关键词：超临界CO2萃取；咖啡因；茄尼醇

Extraction caffeine from tea and solanesol from tobacco leaf by

Abstract: Supercritical CO2 extraction technology is a new separation technology in modern chemical separation. In the article, Removal caffeine Removal from green tea and extract solanesol from tobacco leaf by using supercritical CO2 extraction technology. In the experiment of Removaling caffeine from green tea, study some related factor as pressure, temperature, time, co-solvent, pretreatment, the best technology conditions are: microwave pretreatment, contain 40% water in the tea, co-solvent is 30% ethanol/water, extraction pressure is 40MPa, extraction temperature is 50℃, extraction time is 8h. Extract solanesol from tobacco leaf by supercritical CO2 extraction technology, study the effect of related factors on extraction result, and the suitable technology condition is: co-solvent is 95% ethanol/water, extraction temperature is 50℃, extraction pressure is 20MPa, extraction time is 2h.

Key words: Supercritical CO2; Extraction caffeine; Solanesol