超臨界CO2提取綠茶中咖啡因與煙葉中的茄尼醇

生物工程論文編號(hào):SW033  論文字?jǐn)?shù):11954,頁(yè)數(shù):23

目  錄
中文摘要 Ⅰ
英文摘要. II
目  錄 III
1 緒論 1
1.1 前言 1
1.2 研究進(jìn)展 2
1.3 研究的目的和意義 7
2 綠茶中咖啡因與煙葉中茄尼醇的提取工藝研究 8
2.1 材料與方法 8
2.2 綠茶中咖啡因提取的實(shí)驗(yàn)方法 9
2.4 煙葉中茄尼醇提取的實(shí)驗(yàn)方法 11
2.5 本章討論 13
3 實(shí)驗(yàn)結(jié)果與討論 14
3.1 咖啡因、茶多酚的實(shí)驗(yàn)結(jié)果 14
3.2 茄尼醇的實(shí)驗(yàn)結(jié)果 16
3.3 本章討論 16
4 結(jié)論與展望 17
致 謝 18
參考文獻(xiàn) 19

摘要：超臨界CO2萃取技術(shù)（Supercritical Fluid Extraction, 簡(jiǎn)稱(chēng)SFE）是近代化工分離中一種較新型的分離技術(shù)。本文應(yīng)用該技術(shù)脫除綠茶中咖啡因與提取煙葉中的茄尼醇。在脫除綠茶中咖啡因時(shí)，研究了萃取壓力、萃取溫度、萃取時(shí)間、夾帶劑使用、預(yù)處理等方面，確定了萃取體系最佳的工藝條件是：微波預(yù)處理，茶葉含水量是40%，夾帶劑是30%的乙醇/水，萃取壓力為40MPa，萃取溫度為50℃，萃取時(shí)間為8h。采用超臨界CO2萃取技術(shù)提取廢次煙葉中的有效成分茄尼醇時(shí)，考察了相關(guān)因素對(duì)提取分離的影響，基本確定了萃取體系的適宜工藝條件：夾帶劑乙醇體積分?jǐn)?shù)為95%、萃取溫度在50℃、萃取壓力為20 MPa，萃取時(shí)間是2h。

關(guān)鍵詞：超臨界CO2萃��；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