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Modelling the solubility in Bayer liquors: A critical review and new models |
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| Authors: | Patrice Nortier Pierre Chagnon Alison E. Lewis |
| Affiliation: | aLaboratoire de Génie des Procédés Papetiers (LGP2), UMR CNRS 5518, Grenoble INP-Pagora - 461, rue de la papeterie – 38402 Saint-Martin-d'Hères, France;bLaboratoire Modélisation Statistique et CFD, Rhodia Operations, 85 rue des Frères Perret, B.P. 62, 69192 Saint Fons cedex, France;cDepartment of Chemical Engineering, University of Cape Town, Private Bag Rondebosch 7701, South Africa |
| Abstract: | 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. |
| Keywords: | Crystallisation Phase equilibria Solutions Parameter identification Bayer liquor Solubility |
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