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首页> 外文期刊>Separation and Purification Technology >Distribution of dye into KDP crystals in a continuous MSMPR crystallizer
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Distribution of dye into KDP crystals in a continuous MSMPR crystallizer

机译：在连续MSMPR结晶器中将染料分配到KDP晶体中

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摘要

Colored potassium dihydrogen phosphate (KDP) crystals from a dye (sky blue) solution were produced in a mixed suspension mixed product removal (MSMPR) crystallizer.The crystal size distribution (CSD) of the KDP crystals was correlated by a size-dependent growth rate model.The growth rate increased with crystal size,but it decreased as the residence time increased.Two different concentrations of dye in the solution were examined for MSMPR crystallization of KDP crystals.The colored crystals from the solution with low dye-concentration generated regular-shaped KDP crystals.The dye distribution coefficient into the regular-shaped KDP crystals was less than unity.However,the colored crystals from the solution with high dye-concentration formed the special-shaped KDP crystals having no (100) sector.The dye distribution coefficient into the special-shaped KDP crystals from the dye solution was larger than unity.The dye distribution coefficient as a function of crystal size was presented,and then the relationship between the aspect ratio of the morphology of KDP crystals and dye distribution coefficient was discussed.As a result,a distribution model of dye impurity in KDP crystals for an MSMPR crystallizer could be first proposed in this work.
机译：在混合悬浮液混合产物去除（MSMPR）结晶器中从染料（天蓝色）溶液中产生了彩色的磷酸二氢钾（KDP）晶体.KDP晶体的晶体尺寸分布（CSD）与尺寸依赖的生长速率相关生长速率随晶体尺寸的增加而增加，但随停留时间的增加而降低。检查了溶液中两种不同浓度的染料对KDP晶体的MSMPR结晶作用。低染料浓度的溶液中的有色晶体生成规则的规则形KDP晶体中的染料分布系数小于1.但是，染料浓度高的溶液中的有色晶体形成了无（100）扇形的异形KDP晶体。从染料溶液到异形KDP晶体的系数大于1。提出了染料分布系数与晶体尺寸的关系，并然后讨论了KDP晶体形态的长径比与染料分布系数之间的关系。因此，本工作首先提出了MSMPR结晶器在KDP晶体中染料杂质的分布模型。

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