Size Distribution of Needle-Shape Crystals of Monosodium L-Glutamate Obtained by Seeded Batch Cooling Crystallization
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概要
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Monosodium L-glutamate crystals, which are of fragile needle, were obtained by batch crystallization with a natural cooling mode from aqueous solution. The effect of seeding on the product size was examined over a wide range of seed-loadings. The seed-loading ratio Cs, defined as the mass ratio of the added seeds to the theoretical yield per batch, had basically the same effect on the product crystal size as observed previously in cooling crystallization of mechanically strong granular crystals such as potassium alum. At high seed-loading ratios as Cs ≥ Cs*, where Cs* is a critical value of Cs, seed crystals grew with practically no secondary nucleation. Crystal breakage due to mechanical impacts brought by an agitator occurred only slightly for the small products. For the large crystals the breakage was significant. The breakage also depended on the type of stirrers used; the anchor stirrer induced less breakage than the turbine stirrer. The transient supersaturation was measured on-line by an electro-conductivity method.
- 社団法人 化学工学会の論文
- 2004-03-01
著者
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DOKI Norihito
Department of Chemical Engineering, Iwate University
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Doki Norihito
Department Of Chemical Engineering Iwate University
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Yokota M
Department Of Chemical Engineering Iwate University
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Kubota Noriaki
Department Of Chemical Engineering Iwate University
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Kubota Noriaki
Department Of Applied Chemistry And Molecular Science Iwate University
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YOKOTA Masaaki
Department of Chemical Engineering, Iwate University
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SASAKI Shigeko
Department of Chemical Engineering, Iwate University
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Yokota Masaaki
Department Of Chemical Engineering Iwate University
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Sasaki Shigeko
Department Of Chemical Engineering Iwate University
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Yokota Masaaki
Department Of Applied Chemistry And Materials Science Iwate University
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