Crystallization kinetics of ammonium perchlorate in MSMPR crystallizer

The effects of supersaturation level, sodium chloride (NaCl) as impurity, a nd the suspension density of the crystallizer content on the crystallizatio n kinetics of ammonium perchlorate (AP) were studied in a mixed-suspension mixed-product removal crystallizer. The product crystals have a plate-like morphology. The crystal size distribution is not affected by the supersatur ation level. There was a deviation from the ideal population density where the growth rate of pure AP crystallization was size dependent with the orde r of 0.4 according to Abegg, Stevens and Larson (ASL) model, However, the A SL model was not found to be suitable to express the growth rate of the cry stals in NaCl containing AP solution. Also when suspension density of the c rystallizer increased, secondary nucleation was observed. (C) 2000 Elsevier Science B.V. All rights reserved.