PREPARATION OF POTASSIUM SULFATE IN A REACTION OF POTASSIUM CHLORIDE AND CALCIUM SULFATE
Abstract
The introduction of triethanolamine into conversion of potassium chloride and calcium sulfate was found to promote the formation of potassium sulfate on a reaction: 2KCl + CaSO4∙2H2O → K2SO4 + CaCl2 + 2H2O, while in a water media this process consists of two stages. On the first stage syngenite is formed, while on the second stage К2SO4·CaSO4·H2O is decomposed with a formation of potassium sulfate as follows: 2KCl + 2CaSO4∙2H2O→ K2SO4·CaSO4·H2O + CaCl2 + H2O, K2SO4·CaSO4·H2O → K2SO4 + CaSO4 + H2O. The optimal conditions of realization of reaction (1) in presence a triethanolamine are found. For this process to be fulfilled, the 60% concentration of triethanolamine is necessary, with the norm of КС1 flow of 140-160% from stoichiometry and a 3 h of agitation at the rotation speed of 350 turns/min. At these conditions the content of К2SO4 in the prepared product is 91–93 % and the utilization factor of potassium ion is 90–92%.
About the Authors
I. I. Goncharik
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Ph. D. (Engineering), Senior Researcher
Belarus
Ph. D. (Engineering), Senior Researcher
V. V. Shauchuk
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
D. Sc. (Chemistry), Head of Department
Belarus
D. Sc. (Chemistry), Head of Department
O. A. Kudzina
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Researcher
Belarus
Researcher
F. F. Mozheyko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Corresponding Member of the National Academy of Sciences of Belarus, D. Sc. (Chemistry)
Belarus
Corresponding Member of the National Academy of Sciences of Belarus, D. Sc. (Chemistry)
References
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