Separation of potassium chloride from acqueous potassium chloride
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A PROCESS FOR RECOVERING SOLID POTASSIUM CHLORIDE FROM WATER-SOLUBLE COMPOSITIONS CONTAINING POTASSIUM CHLORIDE AND CALCIUM CHLORIDE WHICH COMPRISES, ADMIXING SUFFICIENT AMMONIA WITH AN AQUEOUS SOLUTION OF THE COMPOSITION CONTAINING THE POTASSIUM CHLORIDE TO BE RECOVERED, AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 50*C. TO ABOUT MINUS 70*C., TO PRODUCE AN AMMONIACAL SLURRY CONTAINING SOLID POTASSIUM CHLORIDE THEREBY PRECIPITATED FROM THE SOLUTION, THE AMMONIACAL SLURRY HAVING A CONCENTRATION BY WEIGHT OF FROM ABOUT 10 TO ABOUT 40 PERCENT AMMONIA, AND SEPARATING THE SOLID POTASSIUM CHLORIDE FROM THE SO-FORMED SLURRY, THEREBY RECOVERING SOLID POTASSIUM CHLORIDE.
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