Vapor−Liquid Equilibria for Alcohol + Alcohol + Sodium Iodide at 298.15 K

Abstract

Vapor−liquid equilibria for methanol + propan-1-ol + NaI, methanol + propan-2-ol + NaI, ethanol + propan-1-ol + NaI, and ethanol + propan-2-ol + NaI systems were measured at 298.15 K using a static method. The apparatus was tested by comparing results for ethanol + water and ethanol + water + CaCl2 with literature results. Results were tested for thermodynamic consistency by Herinton's area test and point test. NaI exerted a salting-in effect on all binary alcohol solutions and the order of the salt effect of NaI was methanol + ethanol < ethanol + propan-1-ol < ethanol + propan-2-ol < methanol + propan-1-ol < methanol + propan-2-ol. Hála's model was applied for the correlation of four alcohol + alcohol + salt systems using observed data. Calculated β values in Hála's equation were between 2.8 and 3.9 for the four alcohol + alcohol + NaI systems.

Modified LIQUAC and Modified LIFACA Further Development of Electrolyte Models for the Reliable Prediction of Phase Equilibria with Strong Electrolytes

“…) and (b) saturation vapor pressures of 2-propanol + NaI at 25 °C (Yamamoto et al . ). (Symbol legend: (+) referenced experimental data, () mod.…”

“…Figure shows some results for a prediction of the experimental boiling temperatures of 1-propanol + LiNO 3 at 100.0 kPa (Vercher et al . ) (Figure a) and saturation vapor pressures of 2-propanol + NaI at 25 °C (Yamamoto et al) (Figure b). It can be noted that, with regard to the original models, more-reliable results are obtained for the mod.…”

“…LIFAC) are in good agreement with the experimental data, whereas, for the original models, significant deviations occur. Figure 4 shows some results for a prediction of the experimental boiling temperatures of 1-propanol + LiNO 3 at 100.0 kPa (Vercher et al 26 ) (Figure 4a) and saturation vapor pressures of 2-propanol + NaI at 25°C (Yamamoto et al 27 ) (Figure 4b).…”

“…Figure 4 shows some results for a prediction of the experimental boiling temperatures of 1-propanol + LiNO 3 at 100.0 kPa (Vercher et al 26 ) (Figure 4a) and saturation vapor pressures of 2-propanol + NaI at 25 °C (Yamamoto et al 27 ) (Figure 4b).…”

Vapor−Liquid Equilibria of the Water + 1,3-Propanediol and Water + 1,3-Propanediol + Lithium Bromide Systems

“…The vapor-and liquid-phase compositions were determined using an Abbe-type refractometer (ATAGO, 3T). Since the liquid phase contained a salt, the salt was separated using an evaporating apparatus (Yamamoto et al, 1996). The mole fraction of salt in this liquid phase was obtained from the mass of the separated salt.…”