Recrystallization of calcium sulfate in phosphoric acid solutions; batchwise operation

G. J. Witkamp*, M. M. Seckler, O. S.L. Bruinsma, G. M. van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


A model is presented for the solvent mediated batchwise recrystallization of hemihydrate into dehydrate. The model takes into account the rates of dissolution of hemihydrate and of growth of gypsum. These rates result from the driving forces (under- and supersaturation) that are influenced by temperature and acid concentrations, and from the rate constants, which are mainly affected by impurities. Secondary nucleation can be neglected with respect to the observed recrystallization rates. The presented model can also be applied more generally.

Original languageEnglish (US)
Pages (from-to)1117-1123
Number of pages7
JournalJournal of Crystal Growth
Issue number1-4
StatePublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry


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