MODEL IDENTIFICATION AND CONTROL OF SOLUTION CRYSTALLIZATION PROCESSES - A REVIEW

The modeling of crystal quality (size, shape, and purity) is discussed . Numerical methods for the model solution are reviewed including coll ocation and Galerkin's method on finite elements. Measurement technolo gies for on-line crystal size distribution are presented. The difficul ties with laser light scattering methods are discussed in detail. Para meter estimation is reviewed and new methods based on nonlinear optimi zation are presented. Sample calculations of parameters and their unce rtainty from experimental data are included. The research literature c overing control of continuous and batch crystallization is reviewed, a nd sample calculations of optimal cooling profiles for batch crystalli zers are presented.