Hybrid Control Mechanism of Crystal Morphology Modification for Ternary Solution Treatment via Membrane Assisted Crystallization,Crystal Growth & Design

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Hybrid Control Mechanism of Crystal Morphology Modification for Ternary Solution Treatment via Membrane Assisted Crystallization
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2017-12-28 00:00:00 , DOI: 10.1021/acs.cgd.7b01424
Xiaobin Jiang _{1,

2} , Guannan Li ₁ , Dapeng Lu ₁ , Wu Xiao _{1,

2} , Xuehua Ruan ₂ , Xiangcun Li ₁ , Gaohong He _{1,

2}

Affiliation

Herein, the hybrid control mechanism of the crystal morphology modification for the treatment of a classic industrial ternary solution system (NaCl–EG–H₂O) via membrane assisted crystallization was demonstrated. Solution concentration and component diffusion played the hybrid role on determining the polymorphic outcome of the crystal products. Metastable zone width under various operation temperatures and solution composition was simulated and validated by experimental results. The impact of the dominating growth mechanism (diffusion controlled growth or polynuclear growth) on the crystal morphology was also investigated. An optimized operation route aimed to simultaneously improve the crystal morphology and the separation effect was then developed based on the hybrid control mechanism. The solvent loss decreased from 4.8 to 1.2 wt %. Benefitting from the improved crystal morphology, the operative duration of corresponding downstream was also shortened. Advanced membrane assisted crystallization is a promising technology toward targeted crystal morphology for high-end solid products.

中文翻译：

膜辅助结晶三态固溶处理的晶体形态混合控制机理

这里，晶体形态修饰的混合控制机制用于处理经典的工业三元溶液系统（NaCl–EG–H ₂O）通过膜辅助结晶得到证实。溶液浓度和组分扩散在确定晶体产物的多晶型结果中起着混合作用。通过实验结果模拟和验证了在不同操作温度和溶液成分下的亚稳区宽度。还研究了主要生长机制（扩散控制生长或多核生长）对晶体形态的影响。然后基于混合控制机制，开发了旨在同时改善晶体形态和分离效果的优化操作路线。溶剂损失从4.8重量％降低至1.2重量％。受益于改善的晶体形态，相应下游的操作时间也缩短了。

更新日期：2017-12-28

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