In this paper, a model has been presented to describe crystal growth and dissolution kinetics from a mother liquid referred to as the bulk. The model takes surface integration kinetics as well as transport of heat and mass to (or from) the bulk from (or to) the crystal surface into account. It has been shown, that in the case of concentrated solutions heat transfer plays a dominant role in the total resistance against transport phenomena between crystal surface and bulk. Paraxylene crystallizing from a mixture of its isomers has been taken as an example. Transport phenomena impose certain restrictions on experimental conditions: in order to reduce the dependence of crystal growth kinetics on volume transport phenomena and crystal size, experiments should be performed in turbulent flowing media. Furthermore, the rate equation showed that for second order surface integration kinetics growth becomes always transport limited at higher supersaturations. The graphic representation of the rate equation for second order kinetics can be used for an estimation of kinetic parameters from experimentally determined growth- and dissolution kinetics. © 1990.
