Copyright © 2020 Elsevier B.V. or its licensors or contributors. https://doi.org/10.1016/j.fluid.2011.09.012. For example, the reduction Acetone =0.079. It has been found that sulfur dioxide solubility in organic solvents can be well-correlated by Lewis basicity numbers. The experimental solubility data of elemental sulfur can be well correlated by the modified Apelblat equation. 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. Finally, the free energies of transfer, ΔtrG, entropies of transfer, ΔtrS, and enthalpies of transfer, ΔtrH, of elemental sulfur from toluene to toluene + [C6mim][PF6] mixture were determined based on the solubility measurements. The first and second ionization energies of sulfur are 999.6 and 2252 kJ/mol, respectively. Because the S 8 rings in solid sulfur are held to other rings by London dispersion forces, elemental sulfur is insoluble in water. ► From the point of view of thermodynamics, the free energies, entropies, enthalpies of transfer were calculated to explore solubility behavior of sulfur. Freely soluble in alcohol, in dioxane, in ether, and in otherpowder, usually having a slight, characteristic odor. As a consequence, the ability to discharge this cell from elemental sulfur or a polysulfide with a high sul- ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Solubility of elemental sulfur in pure organic solvents and organic solvent–ionic liquid mixtures from 293.15 to 353.15 K. Copyright © 2011 Elsevier B.V. All rights reserved. Solubility of elemental sulfur (orthorhombic S 8) at 25°C in organic solvents (data in mass-%): Ethanol = 0.066. The melting points of the mixtures are measured, and the mixtures have … By continuing you agree to the use of cookies. Among the pure aromatic and aliphatic hydrocarbons organic solvents … 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. Solubility of elemental sulfur in pure organic solvents and organic solvent–ionic liquid mixtures from 293.15 to 353.15K. Sulfur is solved as sulfate ions and then is determined gravimetrically by precipitation as barium sulphate. By continuing you agree to the use of cookies. Soc . We don't want to use organic solvents for solving sulfur. Any water content will reduce the solubility of S 8 while increasing temperature increases the solubility. Based on the solubility of sulfur in 10 different organic solvents of different polarity by Zheng et al ., [5] ∆ G was calculated to 9.0– 15.5 kJ mol -1 ; average: 12.1 kJ mol -1 for nine of the solvents, but ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Solubility of elemental sulfur in pure organic solvents and organic solvent–ionic liquid mixtures from 293.15 to 353.15 K. Copyright © 2011 Elsevier B.V. All rights reserved. Despite such figures, the +2 oxidation state is rare, with +4 and +6 being more common. We use cookies to help provide and enhance our service and tailor content and ads. Finally, the free energies of transfer, ΔtrG, entropies of transfer, ΔtrS, and enthalpies of transfer, ΔtrH, of elemental sulfur from toluene to toluene + [C6mim][PF6] mixture were determined based on the solubility measurements. The individual effect of four different imidazolium ionic liquids – 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]), 1-hexyl-3-methylimidazolium hexafluorophosphate ([C6mim][PF6]), 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim][BF4]), and 1-hexyl-3-methylimidazolium tetrafluoroborate ([C6mim][BF4]) on the solubility of sulfur in toluene was also studied. Chem. ► Solubilities of sulfur in the mixed solvents containing the organic substance and ionic liquid were measured in details. We have presented the solubility data of sulfur in different pure aromatic, aliphatic hydrocarbon organic solvents (such as chlorobenzene, toluene, p-xylene, cyclohexane) under atmospheric pressure and various temperatures ranging from 293.15 to 353.15 K. Sulfur solubility was measured via the cloud point method using laser beam scattering. ► The modified empirical Apelblat equation was employed to well correlate the experimental solubility data of sulfur. 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