The size distribution of sodium perborate crystals was continually monitored using a Malvern sizer during batch crystallization from aqueous solutions carried out under falling supersaturation established at the experiment onset. The growth rate was determined from the time shift of the crystal size distribution expressed in cumulative oversize numbers. The size independent overall growth rate was first order with respect to supersaturation for crystals larger than 150 mu m. Crystals between 20 and 150 mu m exhibited a significant size-dependent growth rate. Furthermore, the fraction of crystals smaller than 20 mu m, formed by primary nucleation, grew extremely slowly or did not grow at all.
Growth kinetics of sodium perborate from batch crystallization / O., Sohnel; Bravi, Marco; Chianese, Angelo; Mazzarotta, Barbara. - In: JOURNAL OF CRYSTAL GROWTH. - ISSN 0022-0248. - STAMPA. - 160:3-4(1996), pp. 355-360. [10.1016/0022-0248(95)00927-2]
Growth kinetics of sodium perborate from batch crystallization
BRAVI, Marco;CHIANESE, Angelo;MAZZAROTTA, Barbara
1996
Abstract
The size distribution of sodium perborate crystals was continually monitored using a Malvern sizer during batch crystallization from aqueous solutions carried out under falling supersaturation established at the experiment onset. The growth rate was determined from the time shift of the crystal size distribution expressed in cumulative oversize numbers. The size independent overall growth rate was first order with respect to supersaturation for crystals larger than 150 mu m. Crystals between 20 and 150 mu m exhibited a significant size-dependent growth rate. Furthermore, the fraction of crystals smaller than 20 mu m, formed by primary nucleation, grew extremely slowly or did not grow at all.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
