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Given an increasing demand for potassium in Brazil, the mining and use of  carnallite is becoming increasingly important, because the current source of  potassium (sylvinite) is being depleted and there is a risk of shortages.  Based on theoretical and practical data available in the literature, this  work describes the development, simulation, and economic feasibility of a  process for dissolution and crystallization of potassium chloride from  carnallite ore. Positive results were obtained following application of the  Hoffman diagram and determination of the corresponding equation. The proposed  process provided over 85% potassium chloride crystallization, demonstrating  its superior performance, compared to existing procedures.

Crystallization and separation of KCl from carnallite ore: Process development, simulation, and economic feasibility