Crystallization Kinetics of NTO in a Batch Cooling Crystallizer

회분식 냉각 결정화기에서 NTO의 결정화 메카니즘

  • Kim, K.J. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Kim, M.J. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Yeom, C.K. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Lee, J.M. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Choi, H.S. (Department of Chemical Engineering, Chungnam National University) ;
  • Kim, H.S. (1-3-5, Agency of Defense Development) ;
  • Park, B.S. (1-3-5, Agency of Defense Development)
  • 김광주 (한국화학연구소 화학공정 연구센터) ;
  • 김민준 (한국화학연구소 화학공정 연구센터) ;
  • 염충균 (한국화학연구소 화학공정 연구센터) ;
  • 이정민 (한국화학연구소 화학공정 연구센터) ;
  • 최호석 (충남대학교 화학공학과) ;
  • 김현수 (국방과학연구소 1-3-5 연구실) ;
  • 박방삼 (국방과학연구소 1-3-5 연구실)
  • Received : 1998.04.16
  • Accepted : 1998.09.17
  • Published : 1998.12.10

Abstract

The kinetics of crystal growth and nucleation in dependence on the supersaturation of an aqueous solution of 3-nitro-1,2,4-triazol-5-one(NTO) were evaluated on the draft tube-baffle(DTB) crystallizer operated batchwise. The crystal growth rate is proportional to the supersaturation to the 2.9 power, and the nucleation rate to the 4.2 power. The uncleation behavior for NTO-water system in DTB crystallizer was grasped according to Mersmann's criteria. The nucleation in this crystallizer was found to act with heterogeneous nucleation and surface uncleation simultaneously. Simplified relation was derived for calculation of mean crystal size of product crystals from the batch cooling crystallizer. The obtained relation was verified by a set of experiments.

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