Experimental study of the salt effect in vapor/liquid equilibria using headspace gas chromatography

The salt effect on vapor/liquid equilibrium for an ethanol/water system was studied at 70 degrees C using the Headspace Gas Chromatography technique. The azeotropic point of the system was eliminated in the presence of the sa lts studied. All the salts investigated in this work exhibited a salting ou t effect which followed the order of NH4Cl > NaCl > CaCl2 and which increas ed with increasing salt concentration. Good agreement with Furter's equatio n was observed for the experimental data with unsaturated NaCl salt. The sa lt effect parameter, determined from Furter's equation, was found to be a f unction of the liquid concentration.