Collect. Czech. Chem. Commun. 1989, 54, 2962-2969

The effect of the cooling mode on the kinetic parameters of crystallization

Miroslav Broul, Ladislav Hložný, Luděk Provazník, Tomáš Loučka and Vojtěch Vaněček

Research Institute of Inorganic Chemistry, 400 60 Ústí nad Labem


The effect of different cooling regimes (natural, linear, and programmed cooling according to a theoretical curve) on the kinetic parameters of crystallization and on the mean product crystal size is demonstrated by an example of batch cooling crystallization of ammonium aluminium sulphate dodecahydrate. The kinetic exponent g/n determined on the basis of model experiments does not depend on the cooling regime, the system constant BN is highest for the programmed cooling. If this constant is to be a basis for the design of a cooling crystallization equipment, it is necessary to carry out its experimental determination under the same temperature regime.