Electrophoretic Mobility Of Oil Drops In The Presence Of Solvent Extraction Reagents

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The electrophoretic mobility (EM) of hexane and toluene droplets dispersed in aqueous solution has been investigated as a function of pH in the presence and absence of 5,8-diethyl-7-hydroxy-6-dodecanone oxime (the active extractant in the Henkel reagent, LIX63), Dinonylnaphthalene sulfonic acid (HDNNS), di(2-ethylhexyl) phosphoric acid (HDEHP) and tricaprylyl methyl ammonium chloride (Aliquat 336). Both hexane and toluene droplets were found to be negatively charged at pH > 3, with the absolute EM increasing with pH; the toluene droplets were more negatively charged than the hexane droplets. The hydroxyoxlme reagent had no significant effect on the EM, whereas the addition of HDNNS and HDEHP dramatically enhanced the negative charge at the organic/ water interface. In the presence of 1.5 x 10-4 kmol m“3 Aliquat 336, the organic drops became less negatively charged and eventually acquired a positive charge at pH < 9. The results are explained in terms of the preferential adsorption of the aqueous phase hydroxyl ions and the polar groups of the various extract-ants at the organic/water interface.

Original languageEnglish (US)
Pages (from-to)365-380
Number of pages16
JournalSolvent Extraction and Ion Exchange
Volume2
Issue number3
DOIs
StatePublished - Jun 1 1984

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Electrophoretic mobility
Solvent extraction
Oils
Toluene
Hexanes
Hexane
Phosphoric acid
Ammonium Chloride
Oximes
Sulfonic Acids
Water
Adsorption
Acids
Ions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "The electrophoretic mobility (EM) of hexane and toluene droplets dispersed in aqueous solution has been investigated as a function of pH in the presence and absence of 5,8-diethyl-7-hydroxy-6-dodecanone oxime (the active extractant in the Henkel reagent, LIX63), Dinonylnaphthalene sulfonic acid (HDNNS), di(2-ethylhexyl) phosphoric acid (HDEHP) and tricaprylyl methyl ammonium chloride (Aliquat 336). Both hexane and toluene droplets were found to be negatively charged at pH > 3, with the absolute EM increasing with pH; the toluene droplets were more negatively charged than the hexane droplets. The hydroxyoxlme reagent had no significant effect on the EM, whereas the addition of HDNNS and HDEHP dramatically enhanced the negative charge at the organic/ water interface. In the presence of 1.5 x 10-4 kmol m“3 Aliquat 336, the organic drops became less negatively charged and eventually acquired a positive charge at pH < 9. The results are explained in terms of the preferential adsorption of the aqueous phase hydroxyl ions and the polar groups of the various extract-ants at the organic/water interface.",
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Electrophoretic Mobility Of Oil Drops In The Presence Of Solvent Extraction Reagents. / Lin, K. L.; Osseo-Asare, Kwadwo Asare.

In: Solvent Extraction and Ion Exchange, Vol. 2, No. 3, 01.06.1984, p. 365-380.

Research output: Contribution to journalArticle

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