Liquid–liquid Extraction Equilibrium in the CuSO₄–H₂SO₄–MOC 80TD–Iberfluid system

Abstract

A predictive model, which consists of a set of non-linear mass action and mass balance equations solved by using a tailor-made equation-solving program, is used as a basis to predict experimentally measured distribution coefficients for the CuSO 4 -H 2 SO 4 -MOC 80TD-Iberfluid liquid-liquid extraction system at 20°C and aqueous copper concentrations in the range 0.1-1.0 g l -1 . The model is also used to obtain the copper loading isotherm at various initial aqueous pH values.

Modelling Copper (II) Liquid–Liquid Extraction: The System Acorga M5640-Exxsol D100–CuSO4–H2SO4

“…3 Before scaling up the technology, either in the form of mixer-settler or column extraction, a theoretical model of the extraction system is needed in order to design an efficient recovery process in terms of better stability, thus, the equilibrium reaction of copper (II) ions using these extractants has attracted interest and relatively recently several models have been proposed. [4][5][6][7][8] In the present investigation, the extraction equilibrium of copper from sulfate-sulfuric aqueous solutions by Acorga M5640 in Exxsol D100 was studied, and a model was buildup and solved to predict the distribution coefficients and the copper loading isotherms. The predicted values were compared with the experimental data.…”

“…The equations describing the model are a set of nonlinear equations that can not be simultaneously solved analytically, thus a BASIC.2 programm has been used to do the calculations. 8 The equilibrium constant of the overall copper extraction [eqn(1)] was calculated numerically using the program LETAGROP-DISTR. 10 The program searches, for a given reaction, the best set of equilibrium constants that minimises the expression: A predictive model, which consists in a set of non-linear mass action and mass balance equations solved by using a taylor-made equation-solving program, is used as a basis to predict experimentally measured distribution coefficients for the Acorga M5640-Exxsol D100-CuSO 4 -H 2 SO 4 liquid-liquid extraction system at 20°C and aqueous copper concentrations in the range 0.0016-0.0032 mol l -1 .…”