Solvent–Solvent Cooling Crystallization: An Effective Method to Control the Morphology and Size of Ammonium Perchlorate Crystals,Crystal Research and Technology

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Solvent–Solvent Cooling Crystallization: An Effective Method to Control the Morphology and Size of Ammonium Perchlorate Crystals
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2019-09-02 , DOI: 10.1002/crat.201900065
Wei Liu ₁ , Yong Xie ₂ , Qiang Xie ₁ , Kexiong Fang ₂ , Xuan Zhang ₃ , Houhe Chen ₁

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Controlling ammonium perchlorate crystals with desired properties is still a challenge in industrial crystallization. In this work, two different cooling crystallization methods, namely solvent–solvent cooling crystallization and batch cooling crystallization, are compared to prepare ammonium perchlorate crystals with tunable shapes and sizes. The influences of crystallization parameters such as cooling pattern, cooling rate, stirring rate, feed rate, and solution concentration on the morphology and size of ammonium perchlorate particles are studied. The results indicate that solvent–solvent cooling crystallization makes it easier to control the supersaturation of the crystallization system than bath cooling crystallization, resulting in a more uniform morphology of the ammonium perchlorate crystals prepared by the solvent–solvent cooling crystallization. In addition, by adjusting the crystallization conditions, the shape of ammonium perchlorate crystals can be tailored as long rectangle, tabular, spherical, platy, bipyramid, and high‐index faced polyhedron shaped, the mean size of which can be controlled from 43.9 to 191.9 µm. Moreover, the proposed crystallization method provides a promising strategy for the continuous production of ammonium perchlorate crystals in industry; it is also a reference for the crystallization of other materials in crystal engineering.

中文翻译：

溶剂-溶剂冷却结晶：控制高氯酸铵晶体的形态和尺寸的有效方法

在工业结晶中，控制具有所需性能的高氯酸铵晶体仍然是一个挑战。在这项工作中，比较了两种不同的冷却结晶方法，即溶剂-溶剂冷却结晶和间歇冷却结晶，以制备具有可调形状和尺寸的高氯酸铵晶体。研究了冷却方式，冷却速率，搅拌速率，进料速率和溶液浓度等结晶参数对高氯酸铵颗粒形态和尺寸的影响。结果表明，溶剂-溶剂冷却结晶比浴冷却结晶更容易控制结晶系统的过饱和，通过溶剂-溶剂冷却结晶制备的高氯酸铵晶体的形态更均匀。此外，通过调节结晶条件，可以将高氯酸铵晶体的形状调整为长矩形，板状，球形，板状，双锥体和高折射率面多面体形，其平均大小可以控制在43.9至191.9之间。微米此外，提出的结晶方法为工业上连续生产高氯酸铵晶体提供了有希望的策略。它也是晶体工程中其他材料结晶的参考。高折射率面多面体形状，其平均尺寸可以控制在43.9至191.9 µm之间。此外，提出的结晶方法为工业上连续生产高氯酸铵晶体提供了有希望的策略。它也是晶体工程中其他材料结晶的参考。高折射率面多面体形状，其平均尺寸可以控制在43.9至191.9 µm之间。此外，提出的结晶方法为工业上连续生产高氯酸铵晶体提供了有希望的策略。它也是晶体工程中其他材料结晶的参考。

更新日期：2019-09-02

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