The striking effect of an additive on crystallization
Researchers at the Technical University in Delft observed the striking effect additives can have on the crystallization process using a Crystalline PV. Two cooling crystallization processes resulted in products with completely different particle characteristics. When an additive is used, highly spherical particles were formed, in contrast to the agglomerated and needle-like crystals typically obtained during a cooling crystallization.
The Crystalline PV is the ideal tool to study the effects of additives on crystallization processes. Up to eight parallel experiments can be visualized, while crystallization conditions are accurately controlled. The experiments require small amounts of sample, enabling the researcher to study the effects of different conditions on the crystallization process.
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Crystallization without additive.aviCooling crystallization of the compound in the absence of an additive. After appearance of the first crystals, many more appear forming a dense suspension of often agglomerated and needle-like crystals.
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Crystallization in presence of additive.aviThe striking effect a small concentration of an additive has on the appearance of the crystals. The crystals in the suspension appear to be highly spherical in contrast to those grown in the absence of the additive.
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