Modelling the solubility in Bayer liquors: A critical review and new models

An accurate and tractable model of solubility is a pre-requisite for any careful study of precipitation. Reviewing the abundant literature on the sodium aluminate solutions and Bayer Liquor, the authors point out the need for a new model for the apparent solubility of aluminium in actual Bayer Liquors and propose such a model, based on the well established Wesolowski's expression for the infinite dilution solubility and extended Debye–Hückel expression including a large empirical b I term for the “activity coefficient effect”. They suggest a chemical interpretation for this feature.