Preparation of Extrapure Potassium Nitrate

摘要

This paper examines isothermal potassium nitrate crystallization from aqueous solutions and the influence of metallic impurity concentration, percent crystallization, and washing of the crystals on the impurity distribution. We have obtained potassium nitrate with a content of each impurity in the range 5 × 10~(-7) to 1 × 10~(-5) wt %.