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2010 | 12 | 2 | 4-8

Article title

Wastefree purification method for potassium brine used in industrial electrochemical processes


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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 SO42- 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.









Physical description


1 - 1 - 2010
9 - 7 - 2010


  • Institute of Inorganic Chemistry, ul. Sowińskiego 11, 44-101 Gliwice, Poland
  • Institute of Inorganic Chemistry, ul. Sowińskiego 11, 44-101 Gliwice, Poland


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  • Twardowski, Z. & Ulan, J. G. (1999). U. S. Patent No 5,858,240.
  • Bessarabov, D. & Twardowski, Z. (2002). Industrial application of nanofiltration-new perspectives. Membr. Technol., 9, 6-9, DOI:10.1016/S0958-2118(02)09017-1.[Crossref]
  • Barr, A. (2001). Sulphate removal by nanofiltration. Filtration & Separation 38 (6), 18-20, DOI:10.1016/S0015-1882(01)80376-1.[Crossref]
  • Saiki, K., Yoshida, N., Kinoshita, Y. & Kumagai, I. (1995). New Desulfation System for Chlor Alkali Plant. In Modern Chlor Alkali Technology, Vol.6, Ch.8 (pp. 82-88). London, Ed. R. W. Curry.
  • Kaczmarek, T., Kwiecień, J., Mateńko, H. & Sołtysik, B. (1996) Opracowanie sposobu odsiarczania zasolonych wód kopalaianych z KWK "Jaworzno" na adsorbencie nieorganicznym. (Development of a method of desulphating saline mine waters from the Jaworzno Coal Mine using an inorganic adsorbent). Report of the Institute of Inorganic Chemistry in Gliwice No. 4019, unpublished.
  • Cichy, B. & Kwiecień, J. (2000) Opracowanie technologii wytwarzania anionitu do usuwania jonów siarczanowych. (Development of a process for obtaining an anion exchanger for the removal of sulphate ions). Report of the Institute of Inorganic Chemistry in Gliwice No. 4201, unpublished.
  • Sedell, A., Linke, W. F., Francis, A. W. & Bates, R. G. (1952) Solubilities of Inorganic and Organic Compounds. New York, USA, D. Van Nostrand Co. P.284.
  • Pisarska, B. Badania i opracowanie założeń technologicznych do projektu procesowego kompleksu produkcyjnego, obejmującego chloran sodu, chloryn sodu, chloran potasu i podchloryn sodu (Research on and drawing up of process specifications for a manufacturing system comprising sodium chlorate, sodium chlorite, potassium chlorate and sodium hypochlorite)-Development Project No. R05 003 02, in Progress.

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