Precipitate Coflotation of Calcium Sulfite and Calcium Carbonate: Application to Solids Removal from SO2 Wet-Scrubbing Slurries

Robert B. Grieves, Paul M. Schwartz, Dibakar Bhattacharyya

Research output: Contribution to journalArticlepeer-review

Abstract

An experimental study was conducted of the precipitate flotation of calcium sulfite, calcium carbonate, and of mixtures of both particulate species from suspensions of the order 0.1 M, with application to particle separation from the purge stream from a SO2-limestone wet scrubber. The strongly acidic, anionic surfactant, sodium dodecylbenzenesulfonate (NaDBS) provided excellent flotation of both calcium sulfite and calcium carbonate at neutral pH. For concentrations of calcium sulfite plus calcium carbonate of 3.7, 7.8, and 12.0 x 10-2 M, 95% flotation of precipitated sulfite and 97% flotation of carbonate can be accomplished at molar surfactant to sulfite plus carbonate ratios of 0.0035, 0.0023, and 0.0015, respectively.

Original languageEnglish
Pages (from-to)777-786
Number of pages10
JournalSeparation Science
Volume10
Issue number6
DOIs
StatePublished - Dec 1975

Bibliographical note

Funding Information:
The authors wish to acknowledge gratefully the traineeship support of P. M. Schwartz by the U.S. Environmental Protection Agency through Training Grant T 900440.

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Process Chemistry and Technology
  • Chemistry (all)
  • Filtration and Separation
  • Engineering (all)

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