Abstract
The impurity effect on the crystal properties, such as particle size and shape distribution, is significant, having significant impact on the downstream processes as well as on the product effectiveness. Currently very few studies exist that provide a quantitative model to describe crystal purity resulting from crystallization processes in impure media, and none to take into account the simultaneous effect of multiple impurities. Hence, the understanding of the effect of multiple impurities on crystallization process is important in order to obtain the desired product properties. Batch crystallization of potassium dihydrogen phosphate from aqueous solution in the presence of impurities was investigated experimentally by using an online particle vision and measurement tool with real-time image analysis. A mathematical model to describe the crystal purity and aspect ratio is proposed based on a morphological population balance equation including primary nucleation, growth of characteristic faces and multisi...
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