Potassium fluoride,anhydrous
           Potassium fluoride,extra pure
           Potassium fluoride,Granular
           Silicon Dioxide
           Hydrofluoric acid
           Synthetic Cryolite
           Potassium Fluoaluminate
           Ammonium bifluoride
           Potassium Bifluoride
           Aluminium fluoride
           Sodium fluoride
           Potassium Fluorosilicate
           Fluorosilicic Acid
           Sodium silicofluoride
           Potassium Hydroxide Flakes
           Magnesium Fluoride
           Magnesium fluorosilicate
           Barium Fluoride
           More
 
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The invention discloses a method for separating the mixture of potassium chloride and potassium fluoride by the steps of taking the mixture of potassium chloride and potassium fluoride at 300 to 500 DEG C for 1 to 5 hours to remove the organic wastes contained therein. With a mass percentage of 5 ~ 20Wt.% Boron trifluoride in acetonitrile solution, in the refluxing conditions, the reaction for 5 to 24 hours to get potassium tetrafluoroborate and potassium chloride mixture of acetonitrile, filtered to remove chlorination Potassium, potassium tetrafluoroborate containing the filtrate is concentrated, crystallized, dried or spray dried to less than 1000ppm water to obtain potassium tetrafluoroborate. The invention discloses a method for separating potassium chloride and obtaining potassium tetrafluoroborate. The separation method has the advantages of simple process and low cost, and there is basically no safety and environmental protection in the process.