Preparation of basic magnesium carbonate and separation of sodium and potassium salts from bittern

被引：0

作者：

Wang J.-Y. ^{[1
]}

Guo H.-F. ^{[1
]}

Wu Y. ^{[1
]}

Zhao B. ^{[1
]}

Liu X.-W. ^{[1
]}

Cao J.-L. ^{[1
]}

机构：

[1] Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, College of Chemical Engineering and Technology, Hebei University of Technology, Tianjin

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2020年 / 34卷 / 02期

关键词：

Basic magnesium carbonate; Brine; Conversion rate; Phase diagrams;

D O I：

10.3969/j.issn.1003-9015.2020.02.013

中图分类号：

学科分类号：

摘要：

Bittern is a complex water salt system containing a large amount of magnesium and sodium salts, and a small amount of potassium salts. In order to improve the value of magnesium salt products and effectively separate sodium and potassium salts in bittern, basic magnesium carbonate was prepared by reaction of bittern with sodium carbonate or sodium carbonate and sodium hydroxide, and then the remaining salts were separated. The optimal reaction conditions are as follows: Mg2+:CO32-:OH- = 5:4:8:2, reaction temperature = 60 ℃ and reaction time = 2.5 h. The conversion of magnesium ion and carbonate ion were 100% and 91%, respectively, and the basic magnesium carbonate was spherical with diameter of 10~30 μm. After the preparation of basic magnesium carbonate from bittern. The remaining mother liquor can be separated from sodium salt and potassium salt according to the phase diagrams of K+, Na+//Cl-, SO42--H2O system and KCl-NaCl-H2O system. © 2020, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.

引用

页码：383 / 392

页数：9

共 15 条

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