SOLID-LIQUID EQUILIBRIA OF VISCOUS BINARY-MIXTURES WITH ALCOHOLS

Solid-liquid equilibria of the following 11 alcohol systems have been measured by the visual method: cyclohexanol + dodecane, cyclohexanol cyclohexane, cyclohexanol + benzene, cyclohexanol + tetrachloromethan e, 1-butanol + water, 2-butanol + water, 2-methyl-1-propanol + water, 2-pentanol + tetrachloromethane, 1-pentanol + cyclohexane, 2-pentanol + cyclohexane, and 3-pentanol + cyclohexane. For all systems, with the exception of the system cyclohexanol + cyclohexane, eutectic behavior is assumed. With the visual technique not all systems can be determin ed over the whole concentration range because the mixtures become very viscous at low temperatures and high alcohol concentrations. Therefor e the systems cyclohexanol + benzene, 2-butanol + water, and 2-pentano l + cyclohexane were also studied by an analytical method, which is in troduced in this paper. The experimental data of the eutectic systems were compared with predicted values using the modified UNIFAC (Dortmun d) group contribution method.