Sulfonic acids: Catalysts for the liquid-liquid extraction of metals

K. Osseo-Asare; M. E. Keeney

doi:10.1080/01496398008076283

Sulfonic acids: Catalysts for the liquid-liquid extraction of metals

K. Osseo-Asare, M. E. Keeney

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

Three sulfonic acid extractants, dinonylnaphthalene sulfonic acid (HDNNS), didodecylnaphthalene sulfonic acid (HDDNS) and di-(2-ethylhexyl) sodium sulfosuccinate (Aerosol OT, AOT) are compared as to their effects on the extraction of nickel with LIX63. The acidic extractants interact synergistically with the oxime. Interfacial tension results are presented which demonstrate that the sulfonates form reversed micelles in non-polar organic solvents. It is proposed that the reversed micelles catalyze the extraction by specific solubilization of both the metal and the extractant, resulting in an increase in the interfacial concentration of the reacting species. The ability of LIX63 to chelate with nickel without deprotonating permits the synergism to occur at low pH.

Original language	English (US)
Pages (from-to)	999-1011
Number of pages	13
Journal	Separation Science and Technology
Volume	15
Issue number	4
DOIs	https://doi.org/10.1080/01496398008076283
State	Published - May 1 1980

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
Process Chemistry and Technology
Filtration and Separation

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title = "Sulfonic acids: Catalysts for the liquid-liquid extraction of metals",

abstract = "Three sulfonic acid extractants, dinonylnaphthalene sulfonic acid (HDNNS), didodecylnaphthalene sulfonic acid (HDDNS) and di-(2-ethylhexyl) sodium sulfosuccinate (Aerosol OT, AOT) are compared as to their effects on the extraction of nickel with LIX63. The acidic extractants interact synergistically with the oxime. Interfacial tension results are presented which demonstrate that the sulfonates form reversed micelles in non-polar organic solvents. It is proposed that the reversed micelles catalyze the extraction by specific solubilization of both the metal and the extractant, resulting in an increase in the interfacial concentration of the reacting species. The ability of LIX63 to chelate with nickel without deprotonating permits the synergism to occur at low pH.",

author = "K. Osseo-Asare and Keeney, {M. E.}",

note = "Funding Information: This work was supported by the National Science Foundation under Grant No. ENG 76-82141. M. E. Keeney acknowledges fellowship support by the Mining and Mineral Resources Research Institute, The Pennsylvania State University.",

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AU - Osseo-Asare, K.

AU - Keeney, M. E.

N1 - Funding Information: This work was supported by the National Science Foundation under Grant No. ENG 76-82141. M. E. Keeney acknowledges fellowship support by the Mining and Mineral Resources Research Institute, The Pennsylvania State University.

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Y1 - 1980/5/1

N2 - Three sulfonic acid extractants, dinonylnaphthalene sulfonic acid (HDNNS), didodecylnaphthalene sulfonic acid (HDDNS) and di-(2-ethylhexyl) sodium sulfosuccinate (Aerosol OT, AOT) are compared as to their effects on the extraction of nickel with LIX63. The acidic extractants interact synergistically with the oxime. Interfacial tension results are presented which demonstrate that the sulfonates form reversed micelles in non-polar organic solvents. It is proposed that the reversed micelles catalyze the extraction by specific solubilization of both the metal and the extractant, resulting in an increase in the interfacial concentration of the reacting species. The ability of LIX63 to chelate with nickel without deprotonating permits the synergism to occur at low pH.

AB - Three sulfonic acid extractants, dinonylnaphthalene sulfonic acid (HDNNS), didodecylnaphthalene sulfonic acid (HDDNS) and di-(2-ethylhexyl) sodium sulfosuccinate (Aerosol OT, AOT) are compared as to their effects on the extraction of nickel with LIX63. The acidic extractants interact synergistically with the oxime. Interfacial tension results are presented which demonstrate that the sulfonates form reversed micelles in non-polar organic solvents. It is proposed that the reversed micelles catalyze the extraction by specific solubilization of both the metal and the extractant, resulting in an increase in the interfacial concentration of the reacting species. The ability of LIX63 to chelate with nickel without deprotonating permits the synergism to occur at low pH.

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Sulfonic acids: Catalysts for the liquid-liquid extraction of metals

Abstract

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