METHOD OF CONTROLLING PROCESS OF PRODUCING POTASSIUM CHLORIDE Russian patent published in 2013 - IPC C01D3/04 G05D27/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in inorganic chemistry. The method of controlling the process of producing potassium chloride by varying the input flow of water involves controlling the flow rate of water in the solution coming in for crystallisation depending on the flow rate and temperature of the solution, concentration of potassium chloride, magnesium chloride and sodium chloride therein, calculating the flow rate of water in the solution coming in for crystallisation while transmitting the calculated values to a water flow rate control system, and calculating saturation concentration of the solution with respect to sodium chloride. Further, the flow rate of the cooled mother solution after extraction of crystalline potassium chloride therefrom in the hot solution coming in for crystallisation, temperature thereof and content of magnesium chloride therein are measured. The obtained parameters are used to calculate flow rate of water in order to prevent crystallisation of sodium chloride when cooling the mother solution.

EFFECT: invention enables to adjust the process of crystallisation of potassium chloride by feeding an additional amount of water under conditions of returning a suspension of fine crystalline potassium chloride in the cooled mother liquor to the vacuum crystallisation apparatus.

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