METHOD OF PRODUCTION OF POTASSIUM CHLORIDE Russian patent published in 2005 - IPC

FIELD: methods of production of potassium chloride of the heightened purity.

SUBSTANCE: the invention is pertaining to methods of production of potassium chloride of the heightened purity. The method includes dissolution of the potassium-containing raw in a leaching solution, a crystallization of the end product from the hot clarified saturated with potassium chloride solution at the installation of vacuum crystallization with separation of the end product, a heating and feeding back of the mother liquor. At that dissolution of the potassium-containing raw conduct in a flotation machine in the leaching solution gained by treatment of the mother liquor with a chlorine-containing reactant with addition of an acid up to pH = 3-6. In the capacity of the chlorine-containing reactant is used a water solution of sodium or potassium hypochloride, chlorine, and in the capacity of potassium-containing raw - a halurgical or floatation potassium chloride. The method allows to produce potassium chloride with a reduced content of bromides in it.

EFFECT: the invention allows to produce potassium chloride with a reduced content of bromides in it.

2 cl, 1 tbl, 3 ex