Published crystallization kinetics obtained in MSMPR crystallizers are reviewed, and measured nucleation and growth rates are compared on a common basis. In general, the range of variables studied (supersaturation, magma density, stirrer speed, etc.) for any given system is extremely limited. Experimental conditions, particularly those related to crystallizer hydrodynamics, are usually poorly defined and scale-up of kinetics on the basis of such results would not be possible. Conditions under which future laboratory studies should be made are suggested.
On Size-Dependent Crystal Growth Observed size-dependent crystal growth rates have previously been explained in terms of either the influence of bulk diffusion to the crystal surface or the Gibbs-Thomson effect. In this communication we show that these effects are unlikely to be important over the size range 1-100 pm. A more likely cause, size-dependent surface integration kinetics, is suggested and evidence to support this view is presented.
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