Recrystallization of calcium sulfate in phosphoric acid solutions; batchwise operation

Geert-Jan Witkamp*, M. M. Seckler, O. S.L. Bruinsma, G. M. van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

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
Volume99
Issue number1-4
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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