Extraction Technology of Chinese-fir Heartwood by Supercritical Fluid Carbon Dioxide

Taking extraction rate as an indicator,the extraction technology of Chinese-fir heartwood by supercritical carbon dioxide treatment was studied, and the extraction rate of the SFE-CO2 method was compared to that of traditional extraction method. The results show that when extraction processing condition were:extraction pressure 30 MPa,extraction temperature 40℃,extraction time 120 m,and flow velocity 20 kg/h,the extraction rate of SFE-CO2 was 0.99%,0.20%more than that of the traditional extraction method.However,taking the cost into consideration,it is proposed that the traditional extraction is used unless there are specific requirements.

没药挥发油提取工艺研究

目的探讨没药挥发油成分提取方法,确定最佳提取工艺。方法以β-榄香烯含量为指标,采用L9(34)正交试验进行提取工艺的全面优选。结果确定没药挥发油提取方法为CO2超临界萃取法,最佳工艺为:萃取压力25 MPa,温度35℃,萃取时间2 h。结论该工艺成本低,时间短,提取效率高,适合没药挥发油工业化生产。

乳香、没药挥发油的亚临界R134a萃取及GC-MS分析

目的:优选烫伤膏中乳香、没药挥发油的萃取工艺条件并对其挥发性成分进行分析鉴定。方法:选择1,1,1,2-四氟乙烷(R134a)为萃取溶剂,以挥发油提取率为指标,在单因素试验基础上,通过正交试验考察原料粒度、萃取温度及时间对烫伤膏中乳香、没药挥发油亚临界萃取工艺的影响。采用气相色谱-质谱法(GC-MS)对挥发油进行成分分析。结果:最佳萃取工艺为原料粒度80目,萃取温度50℃,萃取时间30min,萃取数1次;挥发油提取率5.19%。GC-MS分析共鉴定出39种化合物,以萜类、链状芳香族化合物(烷烃、醇、酯)为主,其中以苯氧乙酮和[1R-(1α,7β,8a.α)]-1,2,3,5,6,7,8,8a-八氢-1,8a-二甲基-7-(1-甲基乙烯基)-萘的含量最高,分别为37.04%,8.16%。结论:优选的亚临界萃取工艺稳定可靠、合理可行,为烫伤膏的质量控制及二次开发提供实验依据。