无水氯化镁中低含量碱式氯化镁测定研究  

Determination of Basic Magnesium Chloride in Anhydrous Magnesium Chloride by Iodine Method

作　　者：王海萍 WANG Hai-ping(Qinghai Salt Lake Magnesium Industry Co.,Ltd.,Golmud 816000,China)

机构地区：[1]青海盐湖镁业有限公司,青海格尔木816000

出　　处：《盐科学与化工》2022年第5期36-39,共4页Journal of Salt Science and Chemical Industry

摘　　要：文章通过碱式氯化镁物理性质入手,旨在解决无水氯化镁中低含量碱式氯化镁的测定。并对比酸溶/水溶法和碘量法对无水氯化镁中低含量碱式氯化镁的测定,得到碘量法测定无水氯化镁中低含量碱式氯化镁相对准确的结论。碘量法测定无水氯化镁中碱式氯化镁含量是利用碱式氯化镁与盐酸反应,过量的酸又与KI-KIO_(3)反应生成碘,碘与硫代硫酸钠反应,用硫代硫酸钠的消耗量间接计算碱式氯化镁的含量,此种方法可测定无水氯化镁中微量的碱式氯化镁,精度较高。Based on the physical properties of basic magnesium chloride,this article aims to solve the determination of low content of basic magnesium chloride in anhydrous magnesium chloride.This article compared the determination of low content of basic magnesium chloride in anhydrous magnesium chloride by acid solution/water solution method and iodometry,and comed to the conclusion that the determination of low content of basic magnesium chloride in anhydrous magnesium chloride by iodometry is relatively accurate.The iodometric method used basic magnesium chloride to react with hydrochloric acid,excess acid reacts with KI-KIO_(3) to form iodine,iodine reacts with sodium thiosulfate,and the content of basic magnesium chloride is calculated using sodium thiosulfate consumption.This method can determine the trace of basic magnesium chloride in anhydrous magnesium chloride with high accuracy.

关 键 词：无水氯化镁 碱式氯化镁 酸溶/水溶法 碘量法 

分 类 号：TQ132.2[化学工程—无机化工]