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On the modelling of multicomponent acid extraction with long-chain aliphatic amines

Stenström, Stig LU and Wingefors, S (1988) In Canadian Journal of Chemical Engineering 66(2). p.248-257
Abstract
The solvent extraction of phosphoric, hydrochloric, sulphuric, hydrofluosilicic and hydrofluoric acids with long-chain aliphatic amins is modelled. Pure acid equilibria are based on existing isotherms or calculated extraction constants when only experimental data are available. For binary mixtures binary combinations of acid complexes are added. In the aqueous phase Bromley's model for electrolytes is used for calculation of ionic activity coefficients and the appropriate association/dissociation equilibria taken into account for calculation of ionic strength. For the organic phase an empirical model for the non-ideal behaviour of phosphoric acid is used. For multicomponent mixtures at low acid concentrations the model calculates the... (More)
The solvent extraction of phosphoric, hydrochloric, sulphuric, hydrofluosilicic and hydrofluoric acids with long-chain aliphatic amins is modelled. Pure acid equilibria are based on existing isotherms or calculated extraction constants when only experimental data are available. For binary mixtures binary combinations of acid complexes are added. In the aqueous phase Bromley's model for electrolytes is used for calculation of ionic activity coefficients and the appropriate association/dissociation equilibria taken into account for calculation of ionic strength. For the organic phase an empirical model for the non-ideal behaviour of phosphoric acid is used. For multicomponent mixtures at low acid concentrations the model calculates the extraction of phosphoric, hydrochloric and sulphuric acid almost quantitatively. For hydrofluosilicic and hydrofluoric acid the calculations are less precise and further information is needed about the different fluoride exchange equilibria involved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Canadian Journal of Chemical Engineering
volume
66
issue
2
pages
248 - 257
publisher
Wiley-Blackwell
external identifiers
  • wos:A1988N428600009
  • scopus:0023996824
ISSN
0008-4034
DOI
10.1002/cjce.5450660209
language
English
LU publication?
yes
id
9ca3d95d-2bb5-40a5-ae3f-1c7a42a88922 (old id 3914146)
date added to LUP
2013-07-01 09:41:55
date last changed
2017-08-06 04:23:15
@article{9ca3d95d-2bb5-40a5-ae3f-1c7a42a88922,
  abstract     = {The solvent extraction of phosphoric, hydrochloric, sulphuric, hydrofluosilicic and hydrofluoric acids with long-chain aliphatic amins is modelled. Pure acid equilibria are based on existing isotherms or calculated extraction constants when only experimental data are available. For binary mixtures binary combinations of acid complexes are added. In the aqueous phase Bromley's model for electrolytes is used for calculation of ionic activity coefficients and the appropriate association/dissociation equilibria taken into account for calculation of ionic strength. For the organic phase an empirical model for the non-ideal behaviour of phosphoric acid is used. For multicomponent mixtures at low acid concentrations the model calculates the extraction of phosphoric, hydrochloric and sulphuric acid almost quantitatively. For hydrofluosilicic and hydrofluoric acid the calculations are less precise and further information is needed about the different fluoride exchange equilibria involved.},
  author       = {Stenström, Stig and Wingefors, S},
  issn         = {0008-4034},
  language     = {eng},
  number       = {2},
  pages        = {248--257},
  publisher    = {Wiley-Blackwell},
  series       = {Canadian Journal of Chemical Engineering},
  title        = {On the modelling of multicomponent acid extraction with long-chain aliphatic amines},
  url          = {http://dx.doi.org/10.1002/cjce.5450660209},
  volume       = {66},
  year         = {1988},
}