Frontiers of Chemical Science and Engineering
>> 2008,
Volume 2,
Issue 4
doi:
10.1007/s11705-008-0079-z
Green process to recover magnesium chloride from
residue solution of potassium chloride production plant
School of Chemical Engineering and Technology, Tianjin University
Available online: 2008-12-05
Next
Previous
Abstract
The green process to recover magnesium chloride from the residue solution of a potassium chloride production plant, which comes from the leach solution of a potash mine in Laos, is designed and optimized. The residue solution contains magnesium chloride above 25 wt-%, potassium chloride and sodium chloride together below 5 wt-% and a few other ions such as Br, SO and Ca. The recovery process contains two steps: the previous impurity removal operation and the two-stage evaporation-cooling crystallization procedure to produce magnesium chloride. The crystallized impurity carnallite obtained from the first step is recycled to the potassium chloride plant to recover the potassium salt. The developed process is a zero discharge one and thus fulfills the requirements for green chemical industrial production. The produced magnesium chloride is up to industrial criteria.
京公网安备 11010502051620号
