K2SO4 production via the double decomposition reaction of KCl and phosphogypsum

Samir I. Abu-Eishah, Ali A. Bani-Kananeh, Mamdouh A. Allawzi

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. The solubility of phosphogypsum in aqueous solutions of KCl, HCl, and mixtures of both has been first measured at various temperatures and concentrations. The factors affecting the conversion of potassium chloride to potassium sulfate, such as aqueous ammonia to phosphogypsum ratio, weight percent of isopropanol in the solution, weight percent excess phosphogypsum, and reaction temperature and pressure have also been investigated. The optimum reaction conditions obtained at 25°C and atmospheric pressure have been 50% excess phosphogypsum, 4.32 ammonia solution to phosphogypsum ratio, and aqueous solutions containing initial concentrations of 33 wt.% ammonia and 7 wt.% isopropanol. The maximum conversion of KCl to K2SO4 obtained under these conditions was 97.2%. (C) 2000 Elsevier Science S.A. All rights reserved.

Original languageEnglish
Pages (from-to)197-207
Number of pages11
JournalChemical Engineering Journal
Volume76
Issue number3
DOIs
Publication statusPublished - Mar 15 2000
Externally publishedYes

Keywords

  • Double decomposition
  • KSO production
  • Phosphogypsum process
  • Phosphogypsum solubility

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'K2SO4 production via the double decomposition reaction of KCl and phosphogypsum'. Together they form a unique fingerprint.

Cite this