Dynamic features of the CSD obtained during batch crystallization operations in the presence of impurities.

Gilles Févotte (1, 2, 3, 4) , Nesrine Gherras (1, 2, 5)

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
2 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
3 LAGEP - Laboratoire d'automatique et de génie des procédés
4 PROPICE-ENSMSE - Département PROcédés Poudres, Interfaces, Cristallisation et Ecoulements
5 GENERIC-ENSMSE - Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation

The final CSD of particles generated during batch cooling solution crystallization is known to be largely determined by the develop-ment of nucleation phenomena and, therefore, of supersaturation. This is why mastering the final quality of crystals is often related to the application of appropriate temperature control policies. Griffiths' early suggested that supersaturation "showers" illustrated in Fig.1 should be avoided in view of controlling the product CSD~L. ater, inappropriate cooling policies, among which the so-called "natural cooling", were also shown to entail detrimental nucleation "showers". More generally, the pattern in Fig.1 indicates that at any one time when supersaturation exceeds the limit of metastable zone an undesirable burst of nuclei should be produced.

Mots clés: batch crystallization; impurities; nucleation; temperature controlled CSD

Domaines: Génie des procédés

Gilles Févotte, Nesrine Gherras. Dynamic features of the CSD obtained during batch crystallization operations in the presence of impurities.. CGOM 2012 (10th Crystal Growth in Organic Materials), Jun 2012, Limerik, Ireland. pp.141-143. ⟨hal-00731870⟩