Densities and excess molar volumes of the binary system N-methyldiethanolamine + (2-aminoethyl)ethanolamine and its ternary aqueous mixtures from 283.15 to 363.15 K

ABSTRACT

Experimental density data of the binary mixtures of N-methyldiethanolamine + (2-aminoethyl)ethanolamine and the ternary mixtures of N-methyldiethanolamine + (2-aminoethyl)ethanolamine + water were reported at atmospheric pressure over the entire composition range at temperatures from 283.15 to 363.15 K. Density measurements were performed using an Anton Paar digital vibrating U-tube densimeter. Excess molar volumes were calculated from the experimental data and correlated as the Redlich-Kister equation for the binary mixtures, and as the Nagata-Tamura equation for the ternary mixtures. Several empirical models were applied to predict the excess molar volumes of ternary mixtures from the corresponding binary mixture values. It indicates that the best agreement with the experimental data was achieved by the Redlich-Kister, Kohler, and Jacob-Fitzner models.

KEYWORDS:

• N-methyldiethanolamine
• (2-aminoethyl)ethanolamine
• density
• excess molar volume

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplemental data for this article can be accessed at http://dx.doi.org/10.1080/00319104.2015.1115324

Additional information

Funding

The authors are grateful to acknowledge financial support for the work by National Natural Science Foundation of China [grant number 51476129] and the Fundamental Research Funds for the Central Universities.