Vapor-liquid equilibria and salt apparent molar volumes of the water + 2-propanol + tetrabutylammonium bromide system

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Journal of Chemical and Engineering Data; (United States)

DOI:https://doi.org/10.1021/je00015a024· OSTI ID:7228958

Slusher, J T; Decker, K J; Liu, H; Cummings, P T ^[1]; Vega, C A ^[2]; O'Connell, J P ^[3]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Chemical Engineering
2. Univ. of Puerto Rico, Mayaguez (Puerto Rico). Dept. of Chemistry
3. Univ. of Tennessee, Knoxville, TN (United States). Chemical Engineering

Vapor-liquid equilibrium and density measurements have been performed on 1.00--5.89 m tetrabutylammonium bromide (TBAB) in mixtures of 2-propanol and water. The VLE experiments were performed using a modified Othmer still at ambient pressure. The effect of salt on the relative volatility of 2-propanol was evaluated at molalities of 1.00, 1.79, and 5.89 over the full range of solvent composition. At each salt molality, as the alcohol concentration increased, salting-in and then salting-out behavior of the alcohol was observed. The azeotrope was shifted but apparently not eliminated for the salt concentrations studied. Density measurements at 25, 40, and 55 C were taken using a vibrating tube densimeter at four salt molalities over the full range of solvent composition. As salt molality increased, the apparent molar volume of TBAB exhibits a minimum between 1 to 2 m TBAB in pure water, it is slightly larger and monotonically increased in pure 2-propanol, and it is larger yet, with a maximum at lower 2-propanol amounts, in the ternary mixture.

• OSTI ID: 7228958
• Journal Information: Journal of Chemical and Engineering Data; (United States), Vol. 39:3; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIUM HALIDES
DENSITY
THERMODYNAMIC PROPERTIES
BROMIDES
PROPANOLS
AQUEOUS SOLUTIONS
ELECTROLYTES
EQUILIBRIUM
EXPERIMENTAL DATA
MEASURING METHODS
ORGANIC COMPOUNDS
ALCOHOLS
AMMONIUM COMPOUNDS
BROMINE COMPOUNDS
DATA
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MIXTURES
NUMERICAL DATA
PHYSICAL PROPERTIES
SOLUTIONS
400201* - Chemical & Physicochemical Properties