A procedure for the recovery of potassium chloride from chemicals containing sodium and potassium chloride. (Machine-translation by Google Translate, not legally binding)

摘要

A process for the recovery of potassium chloride from brine containing sodium and potassium chloride, characterized by contacting brine at an elevated temperature, above about 260º c, and at a pressure sufficient to maintain the brine at liquid phase, with an organic liquid having the ability to extract more water at a higher temperature than at a lower temperature, in relative proportions such that the water is extracted, and sodium chloride crystals are formed at said substantially elevated temperature without the formation of potassium chloride crystals, remove crystals of sodium chloride from the resulting concentrated brine, cool said concentrated brine with the formation of potassium chloride crystals substantially without formation of sodium chloride crystals, and recover potassium chloride crystalline from the resulting residual brine. (Machine-translation by Google Translate, not legally binding)