Apparent Molar Volumes and Isentropic Compressibilities of Tetraalkylammonium Bromides in Aqueous Propane-1,2-diol. An Attempt to Design Hydraulic Liquids

Abstract

Apparent molar volumes and apparent molar compressibilities for tetramethylammonium, tetraethylammonium, tetrapropylammonium, and tetrabutylammonium bromides in water, propane-1,2-diol, and water−propane-1,2-diol mixtures (mass fraction: 0.25, 0.50, and 0.75) have been determined from solution density measurements at

Experimental solubility and density studies on aqueous solutions of quaternary ammonium halides, and thermodynamic modelling for melting enthalpy estimations

“…In this work, the densities of aqueous solutions of cholinium bromide ([Ch]Br), cholinium chloride ([Ch]Cl) and a series of eight tetraalkylammonium halides (N 1111 X, N 2222 X, N 3333 X, N 4444 X, where X is either the chloride or the bromide anion) were measured from 293.2 K to 348.2 K. In mole fraction basis, the salt concentration ranges from 0.05 to the saturation limit at 298.2 K. Whenever possible, the obtained data were critically compared to data from the open literature. However, although several studies report density data for aqueous solutions of the selected salts [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], few report data on the same range of concentrations investigated in this work [7,[26][27][28][29][30].…”