Ionic Interactions of Calcium Sulfate Dihydrate in Aqueous Calcium Chloride Solutions: Solubilities, Densities, Viscosities, and Electrical Conductivities at 30°C

2004 ◽  
Vol 33 (8) ◽  
pp. 995-1003 ◽  
Author(s):  
Arvind Kumar ◽  
V. P. Mohandas ◽  
V. R. K. S. Susarla ◽  
P. K. Ghosh
Keyword(s):  
Calcium Chloride ◽  
Calcium Sulfate ◽  
Ionic Interactions ◽  
Chloride Solutions ◽  
Calcium Sulfate Dihydrate ◽  
Electrical Conductivities

scholarly journals Obtaining artificial carnallites from magnesium chloride brines

2020 ◽  
Vol 56 (2) ◽  
pp. 229-234
Author(s):  
V. V. Shevchuk ◽  
T. N. Potkina ◽  
A. I. Vaitenka ◽  
O. V. Smetanina
Keyword(s):  
Calcium Chloride ◽  
Magnesium Chloride ◽  
Calcium Sulfate ◽  
Raw Materials ◽  
Potassium Sulfate ◽  
Sulfate Ions ◽  
Chloride Solutions ◽  
Excess Concentration ◽  
Almost All ◽  
Complete Precipitation

The excess of magnesium chloride brines is formed during the polymineral ores processing in order to obtain potassium sulfate. One way to regenerate such brines is to produce artificial carnallite. It is necessary to purify these brines from sulfates for their further use as raw materials for the artificial carnallite production. In this work, the process of desulfurization of magnesium chloride brines with a solution of calcium chloride is studied. The temperature and the processing time, the magnesium chloride solutions concentration and the consumption of desulfurizing agent (calcium chloride) influence on the degree of magnesium chloride solutions purification from sulfate ions was determined. It has been established that almost all sulfate ions interact with calcium ion in 15 minutes and the desulfurization degree reaches 98,08 %. The increase in duration of the suspension mixing is necessary in order to establish equilibrium in the system and relieve the supersaturation in the solution. It has been shown that with increasing solutions saturation with MgCl2, the degree of the magnesium chloride brines purification from SO4 2– ion increases. Complete precipitation of calcium sulfate requires a certain excess concentration of calcium chloride.

Novel attempts for the synthesis of calcium sulfate hydrates in calcium chloride solutions under atmospheric conditions

2012 ◽  
Vol 38 (1) ◽  
pp. 381-387 ◽  
Author(s):  
Jen-Chang Yang ◽  
Hong-Da Wu ◽  
Nai-Chia Teng ◽  
Dian-Yu Ji ◽  
Sheng-Yang Lee
Keyword(s):  
Calcium Chloride ◽  
Calcium Sulfate ◽  
Atmospheric Conditions ◽  
Chloride Solutions
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