菱镁矿制备高纯氟化镁纳米粒子及反应动力学研究  

Preparation of high-purity magnesium fluoride nanoparticles from magnesite and research of its reaction kinetics

作　　者：邢润 马亚丽 郑强 岳岩 李雪 XING Run;MA Ya-li;ZHENG Qiang;YUE Yan;LI Xue(Liaoning Provincial Key Laboratory of Chemical Application Technology,Liaoning Magnesium Calcium Inorganic Functional Materials Engineering Research Center,School of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110020,China)

机构地区：[1]沈阳化工大学化学工程学院、辽宁省镁钙无机功能材料工程研究中心、辽宁省化工应用技术重点实验室,辽宁沈阳110020

出　　处：《化学工程师》2023年第4期8-13,72,共7页Chemical Engineer

基　　金：辽宁省教育厅一般项目(LQ2020001);辽宁省教育厅自然科学青年项目(LQ2020003);辽宁省自然科学基金计划项目(2022-BS-210)。

摘　　要：本文以菱镁矿为原料通过蒸氨、除杂和氟化反应制备了高纯Mg F_(2)纳米粒子,探究了蒸氨过程中温度、反应时间、氨镁比对Mg^(2+)浸出率的影响;除杂过程中草酸用量、静置温度、p H值、静置时间对除杂效果的影响;氟化反应中温度、陈化时间、氟镁比对Mg F_(2)纯度的影响。采用电感耦合等离子体发射光谱仪、X射线衍射仪和扫描电子显微镜对其纯度和晶型进行表征并研究了Mg F_(2)氟化反应的反应动力学。本工艺制备的纳米级高纯Mg F_(2)粉体纯度可以达到99.9%。本制备工艺具有Mg F_(2)的纯度高、原料成本低、工艺路线简单、除杂效率高的优点。In this paper,high-purity magnesium fluoride nanoparticles were prepared from magnesite by ammonia evaporation,impurity removal and fluorination reaction.The effects of temperature,reaction time,ammonia magnesium ratio on the leaching rate of magnesium ions in the ammonia evaporation process,the effects of oxalic acid dosage,standing temperature,pH and standing time on impurity removal effect in the impurity removal process,and the effects of temperature,aging time and fluorine magnesium ratio on the purity of magnesium fluoride in the fluorination reaction were investigated.The purity and crystal form of magnesium fluoride were characterized by inductively coupled plasma atomic emission spectroscopy,X-ray diffraction and scanning electron microscopy.The purity of nanometer high-purity magnesium fluoride powder prepared by this process can reach 99.9%.The preparation process has the advantages of high purity of magnesium fluoride,low raw material cost,simple process route and high impurity removal efficiency.

关 键 词：菱镁矿 高纯氟化镁 纳米粉体制备 蒸氨反应 溶液除杂 

分 类 号：TQ132.2[化学工程—无机化工]