Chloride → Sulfate Ion

Participants

Reaction Steps

Used as the starting sulfate-containing material to produce potassium sulfate was mirabilite (Na2SO4.10H2O). To 1.883 kg of mirabilite were added 0.100 kg of potassium chloride, 1.918 kg of a concentrated sulfate solution of the following composition, in % by weight: Na2SO4 --2to 3; KCl--24 to 25; NaCl--9 to 10; H2O--the balance, 3.440 kg of a sulfate suspension containing 0.598 kg of mirabilite and 2.858 kg of a concentrated chloride solution of the following composition, in % by weight: Na2SO4 --4; KCl--15 to 16; NaCl--17 to 18; H2O--the balance. Obtained as a result were 1.013 kg of glaserite and 6.344 kg of a glaserite solution of the following composition, in % by weight: Na2SO4 --5 to 6; KCl--7 to 8; NaCl--17; H2O-- the balance. The glaserite was treated with a potassium chloride solution (0.710 kg of potassium chloride and 1.815 kg of water) at a temperature of 30° C. for 45 minutes to obtain 1 kg of potassium sulfate and 2.538 kg of a sulfate solution of the following composition, in % by weight: Na2SO4 --2; KCl--18 to 20; NaCl--6 to 7; H2O--the balance. The sulfate solution was evaporated, the amount of evaporated water being 0.620 kg. The resulting concentrated solution was returned to the first stage of conversion.

Provenance & Evidence