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

摘要

The method of producing potassium sulfate. These methods include linking water components containing potassium and sulfate to magnesium chloride (mgc23222),thus obtaining a composition comprising cainite; optionally concentrating the kinite of the composition; reaction of the cainite with magnesium sulfate (MgSO₄) and potassium sulfate (K₂SO₄) so as to convert the cainite into leonite (K₂SO₄.MgSO₄.4H₂O);Optionally, connect the lion with water to remove excessive MgSO4; connect the lion with water to soak mgso832424,contained in the leonite and at least substantially precipitate potassium sulfate (K₂SO₄). The method according to the present can be operated at higher temperatures, in particular at temperatures above 35 ° C and does not require a cooling stage of 20 to 25 ° C. The method produces potassium sulfate with a low amount of chloride.