Natural brine valorisation:: Application of the system K+, Mg2+/Cl-, SO2-4//H2O at 25°C -: Observations on kinetics formation of K2SO4 and K2SO4.MgSO4.6H2O

被引：6
|
作者：
Jannet, DB [1 ]
M'nif, A [1 ]
Rokbani, R [1 ]
机构：
[1] Inst Natl Rech Sci & Tech, Lab Procedes Chim, Hammam Lif 2050, Tunisia
来源：
DESALINATION | 2004年 / 167卷 / 1-3期
关键词：
natural brine valorisation; K2SO4; crystallization; formation kinetics rate of schoenite;
D O I：
10.1016/j.desal.2004.06.141
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The crystallization of K2SO4 in the system K+, Mg2+/Cl-, SO42/H2O involving the reaction 2KCl + MgSO4 reversible arrow K2SO4 + 2KCl was studied. Independently of the experimental procedure applied, it was confirmed that schoenite (K2SO4.MgSO4.6H(2)O) is an inevitable intermediate product of the considered transformation. The double decomposition reaction kinetics depend on formation and dissolution rates of intermediate salt and potassium sulphate, respectively. The formation of schoenite outside of its crystallization field might indicate a metastable space extension of this domain to cover the K2SO4 one. The formation kinetics rate of MgSO4.K2SO4.6H(2)O is quicker than the K2SO4 one.
引用
收藏
页码：319 / 326
页数：8
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