Compared with the solvent-hexane or 6 ̄# oil,the SOT solvent has better ability to extract solanesol and other useful materials from abando-ned tobacco leaves and dross from which nicotine had been extracted,particu-larly, the ability to extract the fine oil of tobacco. SOT provides 14%~15% increase in extraction of solanesol and7%~9%increase( for dross)or 18%~22%increase(for abandoned tobacco leaves)in recovery of solvent. The recovery of fine oil from tobacco is much higher using SOT solvent than using hex...