Logo image
Back
Densities of concentrated alkaline aluminate solutions at temperatures from (323 to 573) K and 10 MPa pressure
Journal article   Peer reviewed

Densities of concentrated alkaline aluminate solutions at temperatures from (323 to 573) K and 10 MPa pressure

L. Hnědkovský, E. Königsberger, L.C. Königsberger, I. Cibulka, S. Schrödle, P.M. May and G. Hefter
Journal of Chemical and Engineering Data, Vol.55(3), pp.1173-1178
2010
DOI: https://doi.org/10.1021/je900584k
url
Link to Published Version *Subscription may be requiredView

Abstract

Densities of highly alkaline sodium aluminate Solutions have been measured by vibrating-tube densimetry over the temperature range 323 <= T/K <= 573 at a pressure of 10 MPa. Ionic strengths, 1, of these mixed solutions were 1 <= l/mol.kg(-1) <= 6, and the degree of Substitution of hydroxide by aluminate, alpha, ranged from 0.1 <= alpha <= 0.4, where alpha = m(A)/m and m(A) and m (= l) ire the aluminate and total molalities, respectively. Apparent molar volumes, V-phi, derived from the density data for the (NaOH + NaAl(OH)(4))(aq) Solutions, were found to follow Young's rule; that is, they depended linearly on the level Of Substitution of aluminate for hydroxide at all temperatures. The slopes of the Young's rule plots were independent of ionic strength at a given temperature but depended linearly on temperature. It is therefore possible to model V-phi (and hence the densities) of ternary (NaOH + NaAl(OH)(4))(aq) mixtures using only two parameters in addition to those needed for the correlation of the binary NaOH(aq) Solutions. This also means that the standard state (infinite dilution) partial molar volumes, V-2 degrees, of pure, hypothetical NaAl(OH)(4)(aq) call readily be obtained from V-2 degrees for NaOH(aq) by linear extrapolation using the two Young's rule parameters.

Details

Metrics

113 Record Views
12 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Citation topics
2 Chemistry
2.89 Ionic, Molecular & Complex Liquids
2.89.462 Excess Molar Volumes
Web Of Science research areas
Chemistry, Multidisciplinary
Engineering, Chemical
Thermodynamics
ESI research areas
Chemistry
Logo image