Selective extraction of potassium chloride by crown ethers in substituted phenol solvents

Y. Marcus, L. E. Asher, J. Hormadaly, E. Pross

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The selective extraction of potassium chloride from aqueous brines containing any or all of the chlorides of sodium, magnesium and calcium, by crown ethers dissolved in substituted phenols is described. The driving force for the transfer of potassium chloride from the aqueous feed through the organic phase into the aqueous strip solutions is the difference in thermodynamic activities of the solute in the two aqueous media. No chemicals are consumed in this process which was tested in a cyclic manner on a laboratory scale with full recovery of the solvent. Losses of the extractant and solvent to the aqueous phases by solubility are minimized by proper choice of these reagents, and the possible use of a diluent. The effects of diluents on the extraction are also presented.

Original languageEnglish
Pages (from-to)27-39
Number of pages13
Issue number1-2
StatePublished - 1 Jan 1981
Externally publishedYes

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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