Selection of solvent is the key for extraction to separate n-alkanes from diesels and to improve the flow ability of diesels at low temperature.

溶剂筛选是溶剂萃取脱除柴油中正构烷烃，改善柴油低温流动性能工艺过程的关键。

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Abstract : A process for extraction of absolute oil from Sichuan 'paste' tobacco was optimized through single factor test and orthogonal test with n-hexane as extraction solvent.

摘要 ： 以四川‘糊烟’为原料，正己烷为提取溶剂，在单因素试验基础上再经正交试验优化‘糊烟’净油提取工艺；

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