Densities of Aqueous Blended Amines

The densities of aqueous mixtures of diethanolamine (DEA) + N -methyldiethanolamine (MDEA) + water, DEA + 2-amino-2-methyl-1-propanol (AMP) + water, and monoethanolamine (MEA) + 2-piperidineethanol (2-PE) + water were measured from 30 °C to 80 °C. A Redlich−Kister equation of the excess volume was applied to represent the density. Based on the available density data for five ternary systems: MEA + MDEA + H 2 O, MEA + AMP + H 2 O, DEA + MDEA + H 2 O, DEA + AMP + H 2 O, and MEA + 2-PE + H 2 O, a generalized set of binary parameters were determined. The density calculations show quite satisfactory results. The overall average absolute percent deviation is about 0.04% for a total of 686 data points.