文献类型：期刊文献

英文题名：Solubility of elemental sulfur in pure organic solvents and organic solvent-ionic liquid mixtures from 293.15 to 353.15K

作者：Ren, Yingqian;Shui, Haizhou;Peng, Changjun[1];Liu, Honglai;Hu, Ying

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2011

卷号：312

期号：1

起止页码：31

外文期刊名：FLUID PHASE EQUILIBRIA

收录：;EI(收录号：20114314450406);WOS:【SCI-EXPANDED(收录号:WOS:000297719100005)】；

基金：The authors gratefully acknowledge the financial support of the National Basic Research Program of China (2009CB219902), the National Natural Science Foundation of China (Nos. 20876041 and 20736002), the Program for Changjiang Scholars and Innovative Research Team in University of China (Grant IRT0721) and the 111 Project (Grant B08021) of China.

语种：英文

外文关键词：Solubility; Elemental sulfur; Organic solvent; Ionic liquid; Mixed solvent

摘要：The solubility of elemental sulfur in pure aromatic and aliphatic hydrocarbons was measured by cloud-point measurements using the laser beam scattering method under atmospheric pressure and temperature ranging from 293.15 to 353.15 K. It was found that the solubility of elemental sulfur in the examined solvents increases with an increase in temperature. Among the solvents tested, sulfur had the highest solubility in toluene. The individual effect of four different imidazolium ionic liquids - 1-butyl-3-methylimidazolium hexafluorophosphate ([C(4)mim][PF6]), 1-hexyl-3-methylimidazolium hexafluorophosphate ([C(6)min][PF6], 1-butyl-3-methylimidazolium tetrafluoroborate ([C(4)mim][ BEd). and 1-hexyl-3-methylimidazolium tetrafluoroborate ([C(6)mim][BF4]) on the solubility of sulfur in toluene was also studied. The results show that both the structures of the cations and concentrations of ionic liquids used to play important roles in the solubility of elemental sulfur. The experimental solubility data of elemental sulfur can be well correlated by the modified Apelblat equation. Finally, the free energies of transfer. Delta(tr)G, entropies of transfer, Delta S-tr, and enthalpies of transfer, Delta H-tr, of elemental sulfur from toluene to toluene + [C(6)mim][PF6] mixture were determined based on the solubility measurements. (C) 2011 Elsevier B.V. All rights reserved.