Wastefree purification method for potassium brine used in industrial electrochemical processes

Pisarska, Bożenna; Nowak, Mariusz

doi:10.2478/v10026-010-0010-5

Abstract

A new concept is presented for purifying potassium brine (KCl solution) obtained from technical-grade potassium chloride. This concept is based on the hydroxide/carbonate method of removing ions of alkaline earth metals and on separating SO₄^2- ions by means of zirconyl anion exchanger. The purification process provides the following products: purified potassium brine suitable for the manufacture of KClO₃ or for further purification and subsequent manufacture of KOH, Cl₂ and H₂ using membrane cell technology, magnesium and potassium containing agricultural lime (chalk) suitable for neutralizing soil acidity and enriching soil with magnesium and potassium, and technical-grade potassium sulphate containing 99.0 to 99.8% K₂SO₄.

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Wastefree purification method for potassium brine used in industrial electrochemical processes

Abstract

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