Abstract
The extraction of copper from sulphuric/sulphate solutions using a hollow fibre module as contactor was studied. The aldoxime Acorga M5640 was used as an extractant. The effects on the extraction rate of the flow-rates, the concentrations of copper and extractant, pH, and the presence of Na2SO4 in the feed phase were investigated. The overall mass transfer coefficient for copper extraction was calculated from the experimental data and was compared with the value evaluated by the resistance in the series model. The extraction process was found to be governed by the diffusion in the boundary aqueous layer and also by the chemical reaction. The kinetic data obtained were used to simulate the extraction of copper with the pseudo-emulsion-based hollow fibre with strip dispersion technique. The accordance between the results thus calculated and the experimental data was found to be satisfactory, particularly for dilute feed solutions.
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Abbreviations
- a:
-
activity
- d i :
-
fibre inner diameter m
- d lm :
-
logarithmic mean of fibre diameters (do − di)/ln(do/di) m
- d o :
-
fibre outer diameter m
- I:
-
ionic strength M
- K aq :
-
overall mass transfer coefficient of extraction m s−1
- K P :
-
overall mass transfer coefficient of permeation m s−1
- k:
-
local mass transfer coefficient m s−1
- m:
-
distribution ratio ([Cu]org/[Cu]aq)
- Q:
-
volumetric flow-rate m3 s−1
- R:
-
resistance to mass transfer s m−1
- R 2 :
-
regression coefficient
- V:
-
volume of phase m3
- x, y:
-
coordinates
- Δ:
-
fractional resistance
- α:
-
fraction of free copper ions, [Cu2+]/[Cu(II)]
- γ:
-
activity coefficient
- aq:
-
aqueous feed phase
- F:
-
forward reaction of extraction
- m:
-
membrane
- org:
-
organic phase
- pseudo:
-
pseudo-emulsion phase
- r:
-
chemical reactionofextraction
- s:
-
shell
- t:
-
tube
- 0:
-
initial value
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Agarwal, S., Reis, M.T.A., Ismael, M.R.C. et al. Extraction of Cu(II) with Acorga M5640 using hollow fibre liquid membrane. Chem. Pap. 69, 679–689 (2015). https://doi.org/10.1515/chempap-2015-0076
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DOI: https://doi.org/10.1515/chempap-2015-0076