Methods for the production of Potassium sulphate from Potassium containing Minerals at high temperatures.

摘要

p methods for the production of potassium sulfate.The Methods include contacting an aqueous composition containing potassium sulfate and magnesium chloride (MgCl2)Obtaining a composition comprising optionally kainite kainite; concentrating the composition; reaction of kainite (MgSO4) with Magnesium sulphate and Potassium sulphate (K2SO4) MOdo of kainite in turn leonita salts (K2SO4. MgSO4.4H2O); optionally contacting of the leonita with water to remove excess MgSO4; and placed in contact with water so the leonita Leach the MgSO4,Content in the precipitate leonita and at least substantially Selective Potassium sulphate (K2SO4).The Method according to the invention can operate at higher temperatures, especially at temperatures above 35 degrees Celsius, and does not require a Cooling Stage 20 to 25 degrees Celsius.The Method produces potassium sulfate with low amount of chloride. / p