Calculation of Nucleation and Crystal Growth Rates for Multi-Stage Continuous Crystallization.
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- Shiroishi Akihiro
- R & D Center, Nissan Chemical Industries Ltd.
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- Muraoka Toshikazu
- R & D Center, Nissan Chemical Industries Ltd.
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- Yoshida Masamichi
- Department of Materials Science and Engineering, Toyama University
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- Miyashita Hisashi
- Department of Materials Science and Engineering, Toyama University
Bibliographic Information
- Other Title
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- 連続多段晶析法における核化速度と結晶成長速度の算出法
- レンゾク タダン ショウセキホウ ニ オケル カクカ ソクド ト ケッショウ
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Abstract
For multi-stage continuous crystallization using MSMPR (Mixed Suspension Mixed Product Removal) crystallizers in series, a new method is proposed of calculating the nucleation and crystal growth rates. The method is developed so as to apply to industrial crystallization processes in which each crystallizer has a different retention time and a suspension volume, and in which the whole slurry withdrawn from the previous crystallizer is supplied to the next one.<BR>The method is based on analytical solutions of the population balance equation. Using the method, one can calculate the nucleation and crystal growth rates independently and simultaneously from the retention time, the amount of crystals and the crystal size distribution for each crystallizer.<BR>The practicability of the method was examined by applying it to three-stage continuous crystallization in a Nissan manufacturing process of melamine. Moreover, the supersaturation and crystal growth rate of melamine were measured by laboratory -scale experiments in order to calculate the operating supersaturation, with which the operation states of each crystallizer in the plant were discussed.
Journal
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- KAGAKU KOGAKU RONBUNSHU
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KAGAKU KOGAKU RONBUNSHU 22 (6), 1326-1333, 1996
The Society of Chemical Engineers, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001204508573824
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- NII Article ID
- 10002669859
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- NII Book ID
- AN00037234
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- ISSN
- 13499203
- 0386216X
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- NDL BIB ID
- 4078148
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed