Modeling the phase equilibrium in liquid-liquid extraction of copper over a wide range of copper and hydroxyoxime extractant concentrations
Vasilyev, Fedor; Virolainen, Sami; Sainio, Tuomo (2017)
Lataukset:
Post-print / Final draft
Vasilyev, Fedor
Virolainen, Sami
Sainio, Tuomo
2017
Chemical Engineering Science
171
88-99
Elsevier
School of Engineering Science
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe201901283324
https://urn.fi/URN:NBN:fi-fe201901283324
Tiivistelmä
The phase equilibrium in the loading and stripping stages of liquid–liquid extraction of copper with hydroxyoxime extractant in kerosene was studied over a wide range of Acorga M5640 extractant (5–25 vol%) and copper (1–45 g/L) concentrations. A mechanistic mathematical model explaining the phase equilibrium was developed and validated. The model accounts for the non-ideality of both the aqueous and the organic phases. The composition of the aqueous sulfate solution was calculated through speciation of the electrolytes with an ion association model. The concentration of the extractant in the organic phase has a strong effect on the equilibrium constant of the extraction reaction. The organic phase non-ideality in the loading stage was described with an empirical correlation. The model parameters were fitted against the experimental data using nonlinear regression analysis. A Markov chain Monte Carlo algorithm was used to assess the reliability of the modeling results. The model has a significantly wider range of application than previous models and thus facilitates the optimization of extractant concentration.
Lähdeviite
Vasilyev, F., Virolainen, S., Sainio, T, 2017. Modeling the phase equilibrium in liquid-liquid extraction of copper over a wide range of copper and hydroxyoxime extractant concentrations. Chemical Engineering Science 171, 88–99. doi.org/10.1016/j.ces.2017.05.003
Alkuperäinen verkko-osoite
https://www.sciencedirect.com/science/article/pii/S0009250917303093Kokoelmat
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