METHOD OF CONTROLLING POTASSIUM CHLORIDE PRODUCTION PROCESS Russian patent published in 2010 - IPC C01D3/04 G05D27/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in production of potassium chloride using a halurgic method. The method of controlling this process involves controlling flow of water into the solution for crystallisation depending on the concentration of potassium chloride and its temperature. Flow of the solution and content of crystalline sodium chloride and magnesium chloride, flow of water for diluting the clarified saturated solution, flow of evaporated water in housings of the vacuum-crystallisation installation and temperature of the liquid phase in the said installation housings are also measured. Flow of water into the solution for crystallisation in the housing of the installation is calculated from the obtained parametres and the calculated values are entered as settings into the water flow control system: where is flow of water in the i-th housing or groups of housings of the vacuum-crystallisation installation, where i=1, 2, 3, 4…N depends on the number of housings, is flow of evaporated water in the i-th housing, t; is flow of water in housings which should be removed from the solution to obtain potassium chloride saturation α_KCl=1 and sodium chloride saturation α_NaCl=1, t; is flow of evaporated water in housing 1 until potassium chloride saturation α_KCl and sodium chloride saturation α_NaCl equal 1, t.

EFFECT: invention simplifies the process owing to real-time control of automation equipment.

2 cl, 6 tbl, 3 ex