Secondary Growth Phenomena in Industrial Crystallization and Their Effects on Crystal Quality.

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  • Matsuoka Masakuni
    Department of Chemical Engineering, Tokyo University of Agriculture and Technology (TUAT)

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Abstract

Growth phenomena and growth rates of crystalline particles in suspension systems are reviewed with an emphasis on the factors that distort the product crystal size distribution of products derived for the ideal mixed suspension mixed product removal (MSMPR) crystallizer. The growth of crystals in suspension systems is defined as secondary growth to distinguish from the growth of single crystals from clear mother liquor. This is in analogy of the classification of nucleation where secondary nucleation mechanisms are highly much complicated and different from the primary one. Roles of growth rate dispersion (GRD), size dependent growth (SDG), growth rate enhancement by micro-crystals (GRE), agglomeration and attrition in distortion of the CSDs are described individually.

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