The Measurement Of Physical Properties Related To Diethyl Carbonate And The Prediction Of Liquid Mixture Viscosity

This paper includes measurement of physical properties related to the process of synthesis and application of diethyl carbonate (DEC), and also inculdes the correlation for viscosities of binary systems and the prediction for the ternary systems through models.The densities and viscosities were measured by a vibrating densimeter(model DA-505U) and a Ubbelohde suspended-level viscometer at atmospheric pressure for DEC + toluene, DEC + p-xylene, DEC + methanol, DEC + 1-propanol, DEC + 2-propanol, DEC + 1-butanol, DEC + 1-pentanol, 1-propanol + 1-pentanol. The excess molar volume (VE ) and departure of viscosity(Δη) were calculated. The VE andΔηwere fitted by Redlich-Kister equation respectively.A modified viscosity model for the binary systems without water was obtained. Through it the binary systems can be correlated including the composition and temperature, and at the same time, the viscosities of the ternary systems can be prediction. The thirty four binary systems were correlated and the average deviation was 1% approximately. The nine ternary systems were predicted and the deviation of each experimental point was about within 5%. The calculation results showed that the modified model can be applied to the correlation and prediction.Another model for the binary systems with water was obtained. The seven systems were correlated and the average deviation was about 1%. This model can be used to predict the viscosities of the ternary systems at every temperature respectively. The four ternary systems were predicted and the average deviation was 10% approximately.