食品科学 ›› 2003, Vol. 24 ›› Issue (5): 88-91.

• 工艺技术 • 上一篇    下一篇

超临界CO2脱除茶叶咖啡碱的工艺优化研究

 周海滨, 宋新生   

  1. 江西省鹰潭市工业技术研究所
  • 出版日期:2003-05-15 发布日期:2011-12-13

Study on Supercritical CO2Extraction of Caffeine from Tea

 ZHOU  Hai-Bin, SONG  Xin-Sheng   

  • Online:2003-05-15 Published:2011-12-13

摘要: 本文在大量实验基础上,研究了超临界CO2脱除茶叶中咖啡碱的工艺条件优化,着重讨论了影响咖啡碱脱除率的因素及茶叶风味的保存因素,结合产品质量分析,得到了预脱茶香和脱咖啡碱的两级萃取、茶香吸附和咖啡碱解析的两路分离、加稀乙醇作夹带剂的最佳工艺路线及参数,达到既保持了茶叶特别香味,又能有效脱除茶叶中咖啡碱的目的。

关键词: 超临界CO2, 脱除, 茶叶, 咖啡碱, 工艺优化

Abstract: A technology for extraction of caffeine from tea with super- critical CO2 as solvent was optimized on the basis of experimentalresults. The effects of pressure, temperature, flow and entrainer on the extract-rate and relationship were investigated. A two-stageextraction and two-stage separation procedures with rare alcohol as entrainer were established. The optimum parameters were found.Chemical analysis revealed that although the caffeine was extracted, the special flavor of tea was retained.

Key words: supercritical CO2, extraction, tea, caffeine, optimum technology