Studies on thermodynamics of solution by gas chromatography: solubility measurements of hydrocarbons in cycloalkanols

Abstract

Activity coefficients at infinite dilution have been determined by gas–liquid chromatography for nine hydrocarbons solutes in cyclopentanol, cyclohexanol, cycloheptanol, benzyl alcohol, and n-heptanol at 25 °C. Experimental results for cyclopentane and cyclohexane in cycloalkanols compare favourably with the values obtained by extrapolation to infinite dilution of activity coefficient data calculated from Benson et al.'s static (vapour–liquid equilibrium) measurements. Some characteristics of the solute–solvent interaction in the systems are discussed in light of statistical approaches (thermal and athermal contributions).

Development of correlations for describing solute transfer into acyclic alcohol solvents based on the Abraham model and fragment-specific equation coefficients

“…fragments. The available log K data for solutes in cyclic alcohols [35][36][37][38] is very limited mostly to gases and alkane solutes, and there is not sufficient experimental data at this time to perform a meaningful regression analysis. The database used in the regression analysis did contain only a single alkanediol (ethylene glycol), and caution needs to be exercised in using the fragment values for alcohols containing more than one OH group.…”

A New Test System for Distillation Efficiency Experiments at Elevated Liquid Viscosities: Vapor–Liquid Equilibrium and Liquid Viscosity Data for Cyclopentanol + Cyclohexanol

“…This is also indicative of the capability of the VLE apparatus used in this work to accurately measure binary phase equilibrium data. A comparison of the relative error values in vapor pressure predictions using eq for the data from this work and the literature data − are shown in Figure a,b. for T lower ≤ T ≤ T upper , where , P v = vapor pressure in Pa, P c = critical pressure in Pa, T = temperature in K, T c = critical temperature in K, T r = reduced temperature, C 1 , C 2 , C 3 , C 4 = model parameters, T lower , T upper = applicable lower and upper temperature limits of the correlation, respectively.…”