Some antisolvents for crystallisation of sodium carbonate

H. Oosterhof*, G. J. Witkamp, G. M. Van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The phase behaviour of ten aqueous mixtures of an alkanediol saturated with sodium carbonate was studied: between 40 and 90°C the solubility of sodium carbonate was measured in mixtures with different alkane-diol to water ratios. Six systems featured phase separation: polyethylene-glycol 200, polyethylene-glycol 400, tri-ethylene-glycol, 1,2-butanediol, 1,3-butanediol and 1,4-butanediol. Four antisolvents were fully miscible: ethylene glycol, di-ethylene-glycol, glycerol, and 1,2-propanediol. Solubility measurements showed that di-ethylene-glycol is the best antisolvent: sodium carbonate recoveries of 99% are achievable.

Original languageEnglish (US)
Pages (from-to)219-227
Number of pages9
JournalFluid Phase Equilibria
Volume155
Issue number2
DOIs
StatePublished - Feb 25 1999
Externally publishedYes

Keywords

  • Alkane- diols
  • Liquid-liquid equilibria
  • Sodium carbonate
  • Solid-fluid equilibria

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry

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