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Change of Calcium Carbonate Crystal Size at steady state in CMSMPR(Continuous Mixed Suspension Mixed Produce Removal) Crystallizer

연속식결정화기 정상상태에서 탄산칼슘 결정크기 변화

  • Han, Hyun Kak (Department of Chemical Engineering, Soonchunhyang University)
  • 한현각 (순천향대학교 나노화학공학과)
  • Received : 2017.06.26
  • Accepted : 2017.07.07
  • Published : 2017.07.31

Abstract

The controlled synthesis of inorganic materials with a specific size and morphology is an important factor in the development of new materials in many fields, such as nanoparticles, medicine, electronics, semiconductors, pharmaceutical sand cosmetics. Solution crystallization is one of the most widely used separation processes in the chemical and pharmaceutical industries. Calcium carbonate has attracted a great deal of attention in industry because of its numerous applications. The mean crystal size, crystal size distribution and morphology are important factors in the continuous crystallization process. In this study, the continuous crystallization of calcium carbonate by the calcium chloride process was investigated. The mean crystal size and crystal size distribution data were obtained by a particle size analyzer. The morphological imaging of the crystalswasper formed by SEM. Under steady state operation, the mean crystal size change was small, but increasing the input concentration and mixing rate increased the crystal size. In this operation, some aragonite was found, but the main crystal phase was calcite.

Keywords

calcium carbonate;crystal size distribution;morphology;calcite;CMSMPR crystallizer

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