Separation of iron from zirconium in concentrated hydrochloric acid solutions by solvent extraction

Chang, Chih-Chien; Chiu, Tai-Ming; Hoh, Ying‐Chu; Wang, Wei-Ko

doi:10.1016/0304-386x(86)90016-2

Cited by 13 publications

(7 citation statements)

References 8 publications

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“…Solvent extraction reaction of FeCl 3 with TBP was identified by the dependence of the distribution coefficient of iron on the chloride ion concentration. Equations (9) and (10) reveal that plot of log½Cl À againt log D should give straight line with a slope of three or four, when the concentrations of TBP and/or hydrogen ion are constant. Figure 3 shows the variation of the distribution coefficients of iron with the total concentration of chloride present in the aqueous phase before extraction, when the initial concentration of FeCl 3 and TBP were 1.0 and 3.0 kmol/m 3 , respectively.…”

Section: Solvent Extraction Of Fecl 3 With Tbpmentioning

confidence: 99%

“…It was reported that HClÁTBP, 2HClÁTBP and 3HClÁTBP might be formed successively as HCl concentration increased for the TBP-HCl system. 10) However, few studies reported so far verified the participation of more than one molecule of HCl in the solvent extraction of FeCl 3 with TBP. Hence we concluded that solvent extraction of FeCl 3 with TBP could be represented by eq.…”

Section: Solvent Extraction Of Fecl 3 With Tbpmentioning

confidence: 99%

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Solvent Extraction Equilibria of FeCl<SUB>3</SUB> with TBP

Lee

Sohn

2004

Mater. Trans.

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Solvent extraction equilibria of FeCl 3 with TPB from chloride solutions were analyzed by considering chemical equilibria, extraction reaction, mass and charge balance equations. The activity coefficients of solutes in aqueous phase were calculated by Bromley equation while ideal behavior was assumed for species in organic phase. Extraction reaction of FeCl 3 with TBP in the experimental range of this study was determined from the dependence of the distribution coefficient of iron on the concentration of chloride ions. By applying ionic equilibria to the results of solvent extraction experiments, equilbrium constant of the extraction reaction was estimated to be 4:5 Â 10 2 . The equilibrium concentrations of solutes in both phases after extraction could be calculated with the ionic equilibria developed in this study. The predicted distribution coefficients of iron agreed well with those measured.

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Section: Solvent Extraction Of Fecl 3 With Tbpmentioning

confidence: 99%

Section: Solvent Extraction Of Fecl 3 With Tbpmentioning

confidence: 99%

Solvent Extraction Equilibria of FeCl<SUB>3</SUB> with TBP

Lee

Sohn

2004

Mater. Trans.

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“…The stoichiometric relation for the extraction of zirconium and hafnium from acid chloride solutions was investigated with Versatic Acid-10 by Lee et al [11]. In order to produce high purity zirconium by removing iron using liquid-liquid extraction, several types of commercial extractants have been chosen, examined and compared by Chang et al [12]. Synergistic extraction involving extraction of metal ion with binary mixture of extractants has been applied to increase the extractability.…”

Section: Introductionmentioning

confidence: 99%

Binary Mixture of Tri-Octyl Amine and Cyanex 923 as Extractant for the Extraction of Zr (IV) from Acidic Chloride Medium

Bhatta¹,

Mishra²

2014

IJNM

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The extraction of zirconium (IV) from aqueous HCl solution by binary mixture TOA and Cyanex 923 using kerosene as diluent was studied. The effect of parameters like aqueous phase acid concentration, extractant concentration, chloride ion concentration, diverse ion effect, metal loading, nature of diluents and temperature on the extraction of Zr (IV) was investigated. The percentage of extraction of Zr(IV) became 100% with 0.1 M TOA and 0.01 M Cyanex 923 from 7 M HCl and also from 4 M HCl with 0.1 M TOA and 0.02 M Cyanex 923. Benzene was found to be effective diluent for the extraction of Zr(IV) with binary mixture of TOA and Cyanex 923. The positive enthalpy change and positive entropy change in the binary extraction system show endothermic process with increase in randomness. Stripping of Zr (IV) from the loaded organic phase containing mixture of TOA (0.1 M) and Cyanex 923 (0.01 M) indicated that HNO3 and Na 2 CO 3 are the best stripping agents.

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“…1) Alamine336 (Tertiary amine, R 3 N, R ¼ CH 3 (CH 2 ) 7 ) has been extensively used in solvent extraction of various metals. [2][3][4][5][6][7][8][9] However, few studies have been reported on the solvent extraction of Mn(II) from strong chloride solution by Alamine336. Filiz reported experimental results on the solvent extraction of Mn(II) by Alamine336 from HCl solution up to 10 kmol/m 3 .…”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Mn(II) from Strong Hydrochloric Acid Solutions by Alamine336

Lee

Filiz

2008

Mater. Trans.

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Solvent extraction reaction of Mn(II) by Alamine336 from strong HCl solution up to 10 kmol/m 3 was identified from the experimental data by using slope analysis method. The equilibrium constant for this solvent extraction reaction was estimated by considering the complex formation reactions between Mn(II) and chloride ion. The activity coefficients of solutes present in the aqueous phase were calculated by Bromley equation. The necessary thermodynamic parameters for the formation of MnCl þ were evaluated from the data reported in the literature. The measured distribution coefficients of Mn(II) agreed well with those calculated in this study.

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Separation of iron from zirconium in concentrated hydrochloric acid solutions by solvent extraction

Cited by 13 publications

References 8 publications

Solvent Extraction Equilibria of FeCl<SUB>3</SUB> with TBP

Solvent Extraction Equilibria of FeCl<SUB>3</SUB> with TBP

Binary Mixture of Tri-Octyl Amine and Cyanex 923 as Extractant for the Extraction of Zr (IV) from Acidic Chloride Medium

Solvent Extraction of Mn(II) from Strong Hydrochloric Acid Solutions by Alamine336

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