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Kinetics of crystallization of potassium chloride from aqueous solutions at 30 °C

✍ Scribed by Dr. Ax. König; Prof. Dr. H.-H. Emons


Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
404 KB
Volume
22
Category
Article
ISSN
0232-1300

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✦ Synopsis


The aim of this work is to usr a diffusion layer model for the determination of individual rate constants of reaction and diffusion step of KCI at 30 "C. Crystal growth rate ~v a s measured by travelling microscope technique. From thc measured valiies of tho mean linear growth rate the resulting individual rat.e constants and the rffcctiverwss factors (GARSIDE) are cvaluated as a fiirictioii of the driving force and of t h c flow velocity of solution. The significance of diffusional and surface rcactioii resistances against mass t raiisfer is discussed in relation to t h e cxperirnental coiidit>ions used.

Gcgenstand der vorliegendrn Arbeit, ist die Anwendung des L)iffusio~~sschichtlrlodells zur Ermitt lung der Konst.ant>en des Diffusionsund Reaktionsschrittes des Kristalltvachstiims von KCI bei 30 "C. Die Krist,allw-achstumsgeschwindigkeit wiirde mittels hlikroskop a m Einzelkristall grmessen. Aus diesen Werten werden die individuellen Konstanten des Diffusions-und des Reaktionsschrittes und deren Effektivitatsfaktoren als Funktion der Triebkraft und der Anstromgeschwindigkeit ermittelt.


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