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Material Sciences 2025
配合物转化法制备高纯无水氟化钙
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Abstract:
本文通过配合物转化法，采用有机体系，以氢氧化钙为原料，经络合反应、重结晶及真空高温脱结晶水得到高纯的二苯基丙二酮钙络合物，进而利用该络合物与氟氢化铵反应制备出高纯无水氟化钙。通过差热分析、透射电镜、X射线衍射、电感耦合等离子体质谱、氧分析仪等手段对制备的氟化钙进行了分析和表征，证明了该方法可以制得纯度高、无水、氧含量低、结晶度高的氟化钙，有效避免了传统“干法”制备的反应条件苛刻、易引入杂质以及“湿法”制备的氧含量高、产物难以过滤的问题，是一种绿色高效新颖的制备方法，为高纯氟化盐这一大类化合物的制备提供了一种新的方法和思路。
In this paper, the complex conversion method was adopted. Using calcium hydroxide as raw material in organic system, high-purity diphenylpropylene glycol calcium complex was obtained by complex reaction, recrystallization and vacuum high temperature decrystallizing water, and then high-purity anhydrous calcium fluoride was prepared by reaction of the complex with ammonium hydroxide. By differential thermal analysis, transmission electron microscopy, X-ray diffraction, inductively coupled plasma mass spectrometry and oxygen analyzer, the prepared calcium fluoride was analyzed and characterized. It was proved that the method can obtain calcium fluoride with high-purity, anhydrous, low oxygen content and high crystallinity. Effectively avoiding the problems of harsh reaction conditions, easy introduction of impurities by traditional “dry” preparation process, and high oxygen content and difficult filtration of products by traditional “wet” preparation process. It is a green, efficient and novel preparation method, which provides a new method and idea for the preparation of high purity fluoride salt.
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