同正己烷、６￣＃油相比，ＳＯＴ溶剂体系具有更好的从废次烟叶中和已萃取过尼古丁的烟渣中萃取茄尼醇和其它物质的能力，特别是对烟叶中精油的萃取能力。ＳＯＴ溶剂体系萃取茄尼醇的能力比６￣＃油、正已烷高１４％～１５％，溶剂回收率高７％～９％（对烟渣萃取）和１８％～２２％（对废次烟叶萃取）。对茄尼醇精油类的回收率无论对烟渣还是废次烟叶、室温或加热条件下，均远远高于６￣＃油和正己烷。ＳＯＴ溶剂体系有可能取代现有工艺中的６￣＃油或正己烷，它不但增加了茄尼醇的回收率，还提供了回收烟叶中精油的新方法。 SOT solvent systems have better ability to extract solanesol and other substances from spent tobacco leaves and nicotine-extracted fly ash than n-hexanes and oils, especially for the extraction of essential oils from tobacco leaves . SOT solvent system extraction of solanesol than 6 ~ # oil, n-hexane high 14% to 15%, solvent recovery of 7% to 9% (extraction of the residue) and 18% to 22% (waste Tobacco leaf extraction). The recovery rate of solanesol oil is much higher than that of 6 ~ # oil and n-hexane at either room temperature or heating, both for the residue and the waste tobacco. SOT solvent system may replace 6 ~ # oil or n-hexane in the existing process, which not only increases the recovery rate of solanesol, but also provides a new method for recovering essential oil from tobacco leaves.