Linear Free Energy Relations as a Means of Generalising and Analysing Extraction Data

Data concerning the principal ways of "condensing" information about extraction equilibria are surveyed. It is shown that, together with the Law of Mass Action, equations based on linear free energy relations constitute an important means of generalising and analysing extraction data. The linear equations reviewed make it possible to describe quantitatively in an abbreviated form the influence of the structure of extractants, the nature of diluents, the nature of the anionic ligands and the cations extracted, and the phase composition on the extraction equilibria in a series of extraction systems, with the aid of relations between the extraction constants and the parameters σ, E_s, ID, H, IE, and IAP, characterising the influence of the factors indicated. Certain general characteristics of the influence of these factors on extraction equilibria and on selectivity, found with the aid of the linear correlations, are described.
The bibliography includes 125 references.