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首页> 外文期刊>Crystal Research and Technology: Journal of Experimental and Industrial Crystallography >Solvent-Solvent Cooling Crystallization: An Effective Method to Control the Morphology and Size of Ammonium Perchlorate Crystals
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Solvent-Solvent Cooling Crystallization: An Effective Method to Control the Morphology and Size of Ammonium Perchlorate Crystals

机译：溶剂 - 溶剂冷却结晶：一种控制氯酸铵晶体形态和尺寸的有效方法

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摘要

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 mu m. 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.
机译：用所需性能控制高氯酸铵晶体仍然是工业结晶中的挑战。在这项工作中，比较两种不同的冷却结晶方法，即溶剂溶剂冷却结晶和分批冷却结晶，以制备具有可调谐形状和尺寸的高氯酸铵晶体。研究了结晶参数，例如冷却图案，冷却速率，搅拌速率，进料速率和溶液浓度对高氯酸铵颗粒的形态和尺寸的影响。结果表明，溶剂 - 溶剂冷却结晶使得更容易控制结晶系统的过饱和而不是浴冷却结晶，导致通过溶剂溶剂冷却结晶制备的高氯酸铵晶体的更均匀的形态。另外，通过调节结晶条件，可以根据长矩形，平板，球形，板状，双溴胺和高折射率面对多面体形状定制铵的铵的形状，平均尺寸可以控制43.9至191.9穆米。此外，所提出的结晶方法提供了在工业中连续生产氯酸铵晶体的有希望的策略;它也是晶体工程中其他材料结晶的参考。

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