FTIR investigation of the reactions of ethyl xanthate with non-activated and activated sulfide minerals

Jaakko Leppinen

Research output: Book/ReportReport

Abstract

FTIR spectroscopy employing the ATR technique has been used to investigate the reactions of aqueous potassium ethyl xanthate with copper(II)- activated and non activated pyrite, pyrrhotite, chalcopyrite and sphalerite. The spectroscopic data are compared to microflotation results with special emphasis on solution pH. FTIR spectroscopy reveals that diethyl dixanthogen is formed on pyrite, pyrrhotite, and chalcopyrite. A monolayer of iron ethyl xanthate co-exists with dixanthogen on the surface of pyrite and a copper xanthate compound on the surface of chalcopy rite. Activation with Cu(II) ions leads to a copper(I) ethyl xanthate-like compound on all the minerals studied. The reaction of ethyl xanthate with non-activated sulfide minerals is favored by low pH, while neutral pH favors the reaction with activated minerals.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages40
ISBN (Print)951-38-3608-8
Publication statusPublished - 1989
MoE publication typeD4 Published development or research report or study

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
Number667
ISSN0358-5077

Keywords

  • FTIR spectroscopy
  • ATR technique
  • investigation
  • reaction kinetics
  • pyrhotite
  • pyrite
  • sphalerite
  • xanthates
  • sulfide minerals
  • comparison

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    Leppinen, J. (1989). FTIR investigation of the reactions of ethyl xanthate with non-activated and activated sulfide minerals. VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 667