Vapor-liquid equilibrium and density measurements of tetraalklylammonium bromide + propanol + water systems
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemical Engineering
- Univ. of Virginia, Charlottesville, VA (United States). Dept. of Chemical Engineering
Isobaric vapor-liquid equilibrium (VLE) measurements at atmospheric pressure were made for 1.0--3.0 m tetrapropylammonium bromide (TPAB) and 3.0 m tetrabutylammonium bromide (TBAB) in mixtures of 2-propanol and water, and 3.0 m TPAB and 3.0 m TBAB in mixtures of 1-propanol and water. In addition, VLE measurements were made on 3.0 m TBAB in 2-propanol + water mixtures at 0.080 bar. The effects of the salt on the VLE in each system were assessed via relative volatilities. The effect of the solute was to salt-out at high alcohol concentrations and salt-in at low alcohol concentrations. A vibrating-tube decimeter was used to obtain solution densities at 25 C from 0.1 to 4 m TBAB or TPAB in the pure solvent and in aqueous 1-propanol and 2-propanol solutions. Variations of the apparent molar volumes with salt molality in the mixed solvent differed markedly from those of the alcohol-free binary, while subtle distinctions were seen among the various salt and alcohol molecular structures.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 103954
- Report Number(s):
- CONF-941128-; ISSN 0021-9568; TRN: IM9541%%394
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. 40, Issue 4; Conference: Annual meeting of the American Institute of Chemical Engineers, San Francisco, CA (United States), 13-18 Nov 1994; Other Information: PBD: Jul-Aug 1995
- Country of Publication:
- United States
- Language:
- English
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