Determination and Correlation of Solubilities of [HBth [CH3SO3] in Binary Solvent of Ethyl Benzoate and Alcohol
The solubility of benzothiazolium methylsulfate ([HBt [CH3SO3]) in binary solvent mixtures of ethyl benzoate and alcohol was measured by equilibrium method. It was found that the solubility of [HBt [CH3SO3] in this mixture increased with alcohol in mixture scaling up at the same temperature. When the composition of mixture was the same, the increase rate of solubility of [HBt [CH3SO3] in binary solvents was very different at various temperature range. All the solubility data were correlated with three thermodynamics models, and the average relative deviation (ARD) of the calculated value of the three models and the measured values was all less than 2.94%. The thermodynamics models revealed that the degree of association of [HBt [CH3SO3] decreased with the alcohol ratio reducing in binary solvents, the fusion enthalpy of HBt [CH3SO3] remained the same at the range from 233.1K to 293.1K. At last, it was summarized that the change rule of content of related components of [HBt [CH3SO3] + ester + alcohol ternary system at different conditions, and some properties of the system were forecasted. The research in this text was hoped to provide meaningful reference for the use and recycling of ionic liquid.