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Extraction of cadmium from phosphoric acid solutions with amines. Part III. A thermodynamic extraction model

Stenström, Stig LU (1987) In Hydrometallurgy 18(1). p.1-20
Abstract
A thermodynamic model for cadmium extraction from phosphoric-hydrochloric acid mixtures has been developed. The model enables calculations of cadmium extraction as well as coextraction of phosphoric and hydrochloric acids to be made. In the aqueous phase Bromley's model for the activity coefficients is adopted. In the organic phase simple expressions for the non-ideal behaviour of phosphoric acid are used. The model is capable of calculating cadmium extraction from 0.02 M up to 6.7 M H3PO4 and chloride concentrations between 0.005 and 0.10 M HCl. For high amine concentrations the prediction for cadmium extraction is too high, indicating that high concentrations of phosphoric acid in the organic phase affect the activity coefficient for the... (More)
A thermodynamic model for cadmium extraction from phosphoric-hydrochloric acid mixtures has been developed. The model enables calculations of cadmium extraction as well as coextraction of phosphoric and hydrochloric acids to be made. In the aqueous phase Bromley's model for the activity coefficients is adopted. In the organic phase simple expressions for the non-ideal behaviour of phosphoric acid are used. The model is capable of calculating cadmium extraction from 0.02 M up to 6.7 M H3PO4 and chloride concentrations between 0.005 and 0.10 M HCl. For high amine concentrations the prediction for cadmium extraction is too high, indicating that high concentrations of phosphoric acid in the organic phase affect the activity coefficient for the extracted cadmium complex significantly. The thermodynamic constant for the extraction equilibrium has been determined as log K11 = 10.23. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Hydrometallurgy
volume
18
issue
1
pages
1 - 20
publisher
Elsevier
external identifiers
  • wos:A1987H208500001
  • scopus:0023345732
ISSN
0304-386X
DOI
10.1016/0304-386X(87)90013-2
language
English
LU publication?
yes
id
d5f26f0a-d291-431b-a0ba-1a2c13d8e21a (old id 3914149)
date added to LUP
2013-07-01 10:00:29
date last changed
2017-07-23 03:55:23
@article{d5f26f0a-d291-431b-a0ba-1a2c13d8e21a,
  abstract     = {A thermodynamic model for cadmium extraction from phosphoric-hydrochloric acid mixtures has been developed. The model enables calculations of cadmium extraction as well as coextraction of phosphoric and hydrochloric acids to be made. In the aqueous phase Bromley's model for the activity coefficients is adopted. In the organic phase simple expressions for the non-ideal behaviour of phosphoric acid are used. The model is capable of calculating cadmium extraction from 0.02 M up to 6.7 M H3PO4 and chloride concentrations between 0.005 and 0.10 M HCl. For high amine concentrations the prediction for cadmium extraction is too high, indicating that high concentrations of phosphoric acid in the organic phase affect the activity coefficient for the extracted cadmium complex significantly. The thermodynamic constant for the extraction equilibrium has been determined as log K11 = 10.23.},
  author       = {Stenström, Stig},
  issn         = {0304-386X},
  language     = {eng},
  number       = {1},
  pages        = {1--20},
  publisher    = {Elsevier},
  series       = {Hydrometallurgy},
  title        = {Extraction of cadmium from phosphoric acid solutions with amines. Part III. A thermodynamic extraction model},
  url          = {http://dx.doi.org/10.1016/0304-386X(87)90013-2},
  volume       = {18},
  year         = {1987},
}