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Liquid densities and excess molar volumes for water + diglycolamine, and water, methanol, ethanol, 1-propanol + triethylene glycol binary systems at atmospheric pressure and temperatures in the range of 283.15 – 363.15 K

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Valtz A., Teodorescu M., Wichterle I., Richon D.

Editorial: Fluid Phase Equilibria, 215, p.129-142, 2004.

Rezumat:

Liquid densities and excess molar volumes (VE) are reported for the binary water + diethylene glycolamine, and water, methanol, ethanol, 1-propanol + triethylene glycol systems at atmospheric pressure and temperatures between 283.15 and 363.15K in 10K intervals. Negative VE were found for all investigated systems. At given temperature, the most negative VE is for the water + diethylene glycolamine system. For water containing systems, VE increase with temperature while the inverse effect was observed for alcoholic systems, i.e. VE became more negative with increasing temperature. For the triethylene glycol systems at constant temperature, absolute value of VE decreases in the series: water > methanol > ethanol > 1-propanol within the whole composition range. The experimental results have been correlated using the three parameter Redlich–Kister equation.

Cuvinte cheie: Diethylene glycolamine; Triethylene glycol; Water; Methanol; Ethanol; 1-Propanol; Density; Experimental; Excess molar volume