自氛围条件下六水氯化镁制备无水氯化镁过程研究  

Preparation of Anhydrous Magnesium Chloride from Magnesium Chloride Hexahydrate Under Self Atmosphere Conditions

作　　者：贾中昊 罗鹏 姚家涛 汪思琪 张勇[1] JIA Zhong-hao;LUO Peng;YAO Jia-tao;WANG Si-qi;ZHANG Yong(School of Materials Science and Engineering,Wuhan University of Engineering,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,武汉430205

出　　处：《建材世界》2024年第3期6-9,14,共5页The World of Building Materials

基　　金：青海省科技计划(2020-GX-103);海西州科技计划(2019-101)

摘　　要：以六水氯化镁为原料,在氯化铵自氛围的条件下成功制备出了高纯度无水氯化镁。研究了配料比、保温温度对无水氯化镁纯度的影响。从热力学和热分解角度研究了六水氯化镁的脱水热分解过程。结果表明:实验条件下,六水氯化镁脱水制备无水氯化镁是近似一级反应;反应机理为随机成核,随后长大。工艺制备数据表明,氯化铵氛围下可以制得高纯无水氯化镁,最佳制备条件为保温时间180 min、保温温度450℃。High purity anhydrous magnesium chloride was successfully prepared using magnesium chloride hexahydrate as raw material under the conditions of ammonium chloride self atmosphere.The effects of ingredient ratio and insulation temperature on the purity of anhydrous magnesium chloride were studied.The dehydration and thermal decomposition process of magnesium chloride hexahydrate was studied from the perspectives of thermodynamics and thermal decomposition.The results indicate that under the experimental conditions,the dehydration of magnesium chloride hexahydrate to prepare anhydrous magnesium chloride is a approximate first-order reaction.The reaction mechanism is random nucleation followed by growth.The process preparation data shows that high-purity anhydrous magnesium chloride can be prepared under ammonium chloride atmosphere.The optimal preparation conditions are a holding time of 180 minutes and a holding temperature of 450℃.

关 键 词：氯化铵 自氛围 无水氯化镁 热力学 

分 类 号：TQ132.2[化学工程—无机化工]