The analysis on the crystallization of cefodizime sodium solvate shows that the conversion-time curve presents three characteristics:S-shape
the turning-point
and the turning-point corresponding to the maximum crystallization rate.Therefore
the crystallization of cefodizime sodium solvate could be assumed as an autocatalytic process
and the Prout-Tompkins model was modified according to the solubility curve in order to apply in solution crystallization.The autocatalytic kinetics of solvate crystallization was studied at different temperatures and initial concentrations.The effect of temperature was explained from two aspects:thermodynamics and nucleation mechanism.The kinetic parameters (activation energy E and pre-exponential factor k) of the autocatalytic kinetic models were estimated by multiple linear regression method.