Recovery of potassium chloride and hydrochloric acid from a mixed solution of potassium chloride, magnesium chloride, and hydrochloric acid
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Component: l Density: approximately 1.05–1.10 g/mL； l Potassium chloride content: approximately 3.5–4.0% (w/w) ； l Magnesium chloride content: approximately 1.0–1.5% (w/w) ； l Calcium chloride content: approximately 0.1% (w/w) ； l Hydrochloric acid content: approximately 2.0–2.5% (w/w) ； Density: approximately 1.07 g/mL. Is it feasible to recover hydrochloric acid and potassium chloride from a solution by evaporation and concentration?
Is it valuable? Sodium hydroxide is added to neutralize the acid, and then calcium and magnesium are precipitated out; after filtration, the remaining potassium is evaporated and crystallized to be sold as fertilizer