Purifying Chlorides: Potassium Sulfate

For plants like rice and banana that suffers from clhorosis, or to prevent soil salinity, has some interest a fertilizer of a K + S (potash plus sulfur). Potassium Sulfate done by a termal fire heated reaction done in a brick furnace betwen KCl (potassium chloride) and Sulfuric Acid (H2SO4). HCl is the co product. Brazil, following ANDA, imports plus than a hundred thousand tons per year. Around the world, production surpasses 4 million ton per year.