No abstract

No abstract

Experimental values of the liquid density have been determined for ternary systems formed by aqueous mixtures of diethanolamine (DEA) + methyldiethanolamine (MDEA), DEA + 2-amino-2-methy-l-propanol (AMP), DEA + 2-piperidineethanol (2PE), DEA + N-methylpyrrolidone (NMP), MDEA + AMP, MDEA + 2PE, MDEA + NMP, and NMP + AMP. The data were obtained at (313.15, 323.15, and 333.15) K, the total concentration of the blended solvents studied was in the range 30-60 mass %, and for each concentration at least seven points were obtained with different proportions of each solvent. The estimated accuracy of the data is (0.0004 g‚cm -3 . From the density data, molar excess volumes were derived, which were correlated using the Redlich-Kister equation; the final expression includes the functionality of both concentration and temperature.

Experimental values of the density and viscosity for aqueous solutions of three alkanolamines composed of 32.5 mass % N-methyldiethanolamine (MDEA) and 12.5 mass % diethanolamine (DEA) with 2, 4, 6, 8, and 10 mass % 2-amino-2-methyl-1-propanol (AMP) have been determined in the temperature range of (303.15 to 343.15) K. The experimental results of the density and viscosity are given as a function of both temperature and AMP concentration. In the range of temperature studied, the experimental density values of the aqueous blends of alkanolamines decrease as the AMP concentration increases while the viscosity values increase as the AMP concentration increases. Correlation equations were obtained to allow the calculation of density and viscosity for aqueous solutions of MDEA and DEA as a function of AMP concentration and temperature.

No abstract

No abstract

The Hquld densities of pure samples of monoethanOlamlne, diethanolamine, sulfolane, Af-methylpyrrolldone, and propylene carbonate were measured at several temperatures ranging from 10 to 60 °C. The experimental data as a function of temperature were fitted to a polynomial equation of the following form: d/(g cm-3) = a + b(t/°C) + c(t/°C)2. Values of the constant ZRA of the modified Rackett equation were evaluated from the experimental data.

No abstract