Abstract
ABSTRACT The kinetics of copper(II) extraction from chloride solutions with ACORGA CLX-50 and three model dipentyl pyridine dicarboxylates having ester groups at various positions in the pyridine ring is investigated. It is shown that the extraction occurs in a diffusional regime and that both the ionic strength and temperature have a strong effect on the rate of copper extraction. Basically, the initial rate of copper extraction (denoted hereafter J0) increases as the ionic strength is increased, whereas J0 increases or decreases versus temperature depending on the ionic strength. Such phenomena are explained in terms of salting-out effects and diffusion properties. Furthermore, ACORGA CLX-50 is shown to exhibit a good kinetic performance compared to the three model dipentyl pyridine dicarboxylates.
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