摘要
试图应用两维溶解度参数理论对能够改善柴油低温流动性能的脱蜡溶剂进行筛选。在建立两维平面坐标模型的基础上,计算了柴油中各组分和14种溶剂的两维溶解度参数,提出了用两维坐标图中溶剂与正构烷烃溶质的距离Rc作为是否相溶的判断依据。通过分析两维溶剂溶解度参数与萃取效果的关系,发现除2-丙醇外其他溶剂的正构烷烃萃取率随着Rc的增大而增大,表明可以依据溶剂的Rc选择柴油的脱蜡溶剂。同时发现物理溶解度参数Δp对溶剂的脱蜡性能影响很小,萃取过程主要受化学溶解度参数分量Δc的影响,且溶剂的偶极力是影响其脱蜡性能的主要因素。
Two-dimensional solubility parameters are applied to select the dewaxing solvents for diesel in improving its flowing performance at low temperature. Based on the established two-dimensional plane model, the two-dimensional solubility parameters of each components of diesels in 14 solvents were calculated, and the distance between solvent and n-alkane （Re） in the two-dimensional plane was proposed as the solvent-solute dissolution judgment. From the analysis of the relationship between the twodimensional solubility parameters of solvents and the n-alkane extraction yields （E）, it was found that E increases with the increase in Rc except 2-propanol, which proves the feasibility by using Rc as the basis to select the dewaxing solvents. It was also found that the physical solubility parameters （△p） have little influence on the dewaxing performance. The extraction is mainly influenced by the chemical solubility parameter （△c） of the solvents, especially the dipolar solubility parameter.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2009年第12期2963-2968,共6页
CIESC Journal
关键词
溶解度参数
溶剂萃取
柴油
正构烷烃
solubility parameters
solvent extraction
diesel
n-alkane
