Extraction of cobalt by kelex 100 and kelex 100/versatic 911 mixtures

Lakshmanan, V. I.; Lawson, G.J.

doi:10.1016/0022-1902(73)80418-x

Cited by 38 publications

(7 citation statements)

References 2 publications

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“…Reagents. Kelex-100 (containing DDQ) (Ashland Chemical Co., Columbus, Ohio) was purified according to the procedure of Lakshmanan and Lawson (5). It was purified by shaking a solution in toluene several times with 1 M hydrochloric acid to remove simple oxine derivatives.…”

Section: Methodsmentioning

confidence: 99%

Preconcentration of trace metals from seawater with 7-dodecenyl-8-quinolinol-impregnated macroporous resin

Isshiki¹,

Tsuji²,

Kuwamoto³

et al. 1987

Anal. Chem.

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7-Dodecenyl-8-qulnollnol (DDQ) Impregnated XAD-4 resin (DDQ resin) was prepared, and Its extraction behavior was studied and compared with solvent extraction with DDQ for Ag, Al, Bl, Cd, Cu, Fe, Ga, Mn, NI, Pb, and Ti. The results demonstrate that the DDQ resin Is effective In the preconcentration of those metals from seawater. The column extraction method using the DDQ resin was applied to seawater analysts with satisfactory results being obtained.

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Section: Methodsmentioning

confidence: 99%

Preconcentration of trace metals from seawater with 7-dodecenyl-8-quinolinol-impregnated macroporous resin

Isshiki¹,

Tsuji²,

Kuwamoto³

et al. 1987

Anal. Chem.

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“…The extraction of some coordinatively unsaturated chelates (i.e., the coordination number of the central atom has not been satisfied) has been demonstrated to be synergistically affected by certain Lewis bases, like the Kelex 100-carboxylic acid systems (7).…”

Section: Gallium Extraction 243mentioning

confidence: 99%

Modifier and Surfactant Dependence of Gallium Extraction by Alkanoyl Oxinates from Basic Solutions

Apak

1996

Separation Science and Technology

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The recently developed method of Ga extraction from basic aluminate solution (pH 13) using an alkanoyl oxine, i.e., myristoyl (M.Ox), palmitoyl (P.Ox), and stearoyl oxine (SOX), solution in chloroform has been improved by incorporating 2-hexanone as a modifier and cetyl trimethyl ammonium bromide (CTAB) as a surfactant into the extraction system. 2-Hexanone synergistically enhanced the extraction rate and Ga yield as its volume percentage was increased from 5 to 20% in the organic phase. Other oxygen-donor modifiers such as methyl isobutyl ketone (MIBK) and I-hexanol, were not as effective as 2-hexanone. By using 10% (by volume) of 2-hexanone in chloroform solution, the order of Ga extraction efficiency for alkanoyl oxinates was M.Ox > P.0x > S O X , i.e., extraction increased with decreasing length of the dkyl group of oxine. The ketone-added system showed satisfactory aluminum tolerance at pH 13, and enabled the shifting of the extraction pH to slightly higher values, which is beneficial for the process economies of Ga recovery from Bayer aluminate liquor. Use of CTAB as a cationic surfactant reduced the equilibration time and increased the Ga yield; the most pronounced effect occurred around its critical micelle concentration, indicative of micellar catalysis via interfacial mechanisms.

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“…A significant amount of fundamental research has been done in the hydrometallurgical field with regard to the nature of the extractants, kinetic rates of extraction, and chemical equilibrium. In these research studies, extractants can be identified (Inoue and Nakashio, 1979) as those which are soluble in the aqueous phase, such as acetylacetone, dithizone, and thenoyltrifluoroacetone (Komatsu et al, 1976;Sekine et al, 1973), and others which are extremely insoluble, such as oxime, bis(2-ethylhexyl) phosphoric acid (D-2EHPA), versatic acid, and /3-alkenyl-8-hydroxyquinoline (or /3-A-8HQ) (Ashbrook, 1975; Kojima and Miyauchi, 1981;Roddy et al, 1971; Lakshmanan and Lawson, 1973;Bauer, 1974; Spink and Okuhara, 1974; Flett, 1977).…”

Section: Introductionmentioning

confidence: 99%

Interfacial kinetics of iron(III) sulfate-sulfuric acid/.beta.-alkenyl-8-hydroxyquinoline-xylene extraction system

Lee

Tavlarides²

1986

Ind. Eng. Chem. Fund.

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The results of a study of the interfacial kinetics for the extraction of iron(III) in sulfuric acid with /3-alkenyl-8hydroxyquinoline are presented. Use of a liquid jet recycle reactor (LJRR) to obtain the interfacial rate data permits appropriate analysis when mass transfer and interfacial reaction contribute to the overall rate. Ionic speciation in the bulk aqueous phase is modeled to obtain the concentrations of Fe3+ and H+. The postulated mechanism giving rise to the rate expression includes the adsorption of HR and the protonation of HR. It also assumes that the rate-determining step is the formation of FeR2+ in the interfacial region. The postulated model is supported by physicochemical evidence, such as interfacial tension data, and statistical evaluation of the model.

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Extraction of cobalt by kelex 100 and kelex 100/versatic 911 mixtures

Cited by 38 publications

References 2 publications

Preconcentration of trace metals from seawater with 7-dodecenyl-8-quinolinol-impregnated macroporous resin

Preconcentration of trace metals from seawater with 7-dodecenyl-8-quinolinol-impregnated macroporous resin

Modifier and Surfactant Dependence of Gallium Extraction by Alkanoyl Oxinates from Basic Solutions

Interfacial kinetics of iron(III) sulfate-sulfuric acid/.beta.-alkenyl-8-hydroxyquinoline-xylene extraction system

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