Characterization and modelling of antisolvent crystallization of salicylic acid in a continuous oscillatory baffled crystallizer

Cameron J. Brown, Juliet A. Adelakun, Xiong wei Ni

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28 Citations (Scopus)
75 Downloads (Pure)

Abstract

Using antisolvent crystallisation of salicylic acid as the model process, we report our experimental investigation into the temporal and spatial steady states of solution concentration and mean crystal size in a continuous oscillatory baffled crystallizer. The evolutions of the two parameters over time and distance along the crystallizer are measured for a variety of operating conditions. The results show that the attainment of long term temporal and spatial stabilities (>100 residence times) for the solute concentrations are easily achieved, whereas the temporal steady states of the mean crystal size are more difficult to accomplish, even though the spatial steady states have been obtained. A simplified population balance model is applied to the experimental data for the determination of nucleation and growth kinetic parameters. From which both the solution concentration and the mean size were predicted and matched to experimental values reasonably well. In addition, we have identified and executed the conditions of long term steady states for extended operation of 6.25 h to produce close to 1 kg of crystal product with minimal variation in crystal size (+/- 3.01 mu m). (C) 2015 The Authors. Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)180-186
Number of pages7
JournalChemical Engineering and Processing: Process Intensification
Volume97
Early online date2 May 2015
DOIs
Publication statusPublished - Nov 2015

Keywords

  • Antisolvent
  • Continuous
  • Crystallization
  • Kinetics
  • Oscillatory baffled crystallizer
  • Population balance

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Energy Engineering and Power Technology

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