Liquid-liquid extraction of tungsteniv with tributyl phosphate

De, Anil K.; Rahaman, M. S.

doi:10.1016/0039-9140(64)80070-9

Cited by 18 publications

(3 citation statements)

References 3 publications

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“…2) are linear with slopes of 2 for the sulphoxides. Solvation number 2 or 3 is commonly observed with solvating solvents (5,11,12). A plot of log equilibrium organic phase metal concentration against log equilibrium aqueous phase metal concentration is linear with a slope of unity indicating the extraction of mononuclear species.…”

Section: Results and Discussion E X T R A C T I O N Of M E T A L Ionsmentioning

confidence: 99%

Solvent extraction separation of Cr(VI)–Mo(VI)–W(VI), Zr(IV)–Hf(IV), and Se(IV)–Te(IV) with sulphoxides

Reddy¹,

Reddy²

1982

Can. J. Chem.

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Section: Results and Discussion E X T R A C T I O N Of M E T A L Ionsmentioning

confidence: 99%

Solvent extraction separation of Cr(VI)–Mo(VI)–W(VI), Zr(IV)–Hf(IV), and Se(IV)–Te(IV) with sulphoxides

Reddy¹,

Reddy²

1982

Can. J. Chem.

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“…Tungsten in steel was determined using the thiocyanate method by De and Rahaman (110,111) following thenoyltrifluoroacetone extraction and tributyl phosphate extraction and by Luke (302) after separation of the other constituents by methyl isobutyl ketone and cupferron extractions. Peterson, Anderson, and Howcroft (400) applied the thiocyanate method to the determination of tungsten in ores and concentrates.…”

Section: Tungstenmentioning

confidence: 99%

Nonferrous metallurgy. II. Zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten

Bachman¹,

Banks²

1967

Anal. Chem.

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“…Solvent extraction of tungsten (VI) from acid solutions has been studied by some researchers, However, since the solubilities of tungstates in mineral acids are generally low, only a limited number of papers exist, for example the extraction of tungsten (VI) was examined from hydrochloric acid solutions by tributyl phosphate (TBP) 1,2) and from aqueous solutions at pH2 by using trialkylamines 3) . However, since the solvent extraction of tungsten (VI) has not always been widely used except when processing mineral materials (schealite (CaWO 4 ), ferbelite (FeWO 4 ), hubnenite (MnWO 4 ) and wolframite (Fe, Mn) WO 4 ) 4) , the present paper investigated the extraction of tungsten (VI) from hydrochloric acid solutions by organophosphorus compound such as trioctyl phosphine oxide (TOPO) and by sulphur-containing compound such as dihexyl sulphoxide (DHSO, R 2 SO), in order to obtain further information on solvent extraction of tungsten (VI).…”

Section: ．Introductionmentioning

confidence: 99%

Liquid-Liquid Extraction of Tungsten (VI) from Hydrochloric Acid Solutions by Trioctyl Phosphine Oxide and Dihexyl Sulphoxide

Sato

Takayanagi

Sato

2010

Journal of the Mining and Materials Processing Institute of Jap

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The extraction of tungsten (VI) from hydrochloric acid solutions by trioctyl phosphine oxide (TOPO) and dihexyl sulphoxide (DHSO, R 2 SO) in benzene was investigated under various conditions. The organic extracts were examined by infrared spectrophotometry. As the results, the following equilibrium equations are proposed for the extraction by TOPO and DHSO: for TOPO, WO 2 Cl 2 (aq) + 2TOPO(org) WO 2 Cl 2 ・2TOPO (org) ; for DHSO, WO 2 Cl 2 (aq) + 2DHSO (org) WO 2 Cl 2 ・2DHSO (org). Here, it is shown that the extracted tungstic chloro complexes WO 2 Cl 2 ・2L (L = TOPO and DHSO) consist of the octahedral structure wherein tungsten (VI) has a coordination number of six. Further the extraction efficiencies for tungsten (VI) by TOPO and DHSO are compared with that by tributyl phosphate (TBP), and it emerges that their order is in TOPO > DHSO > TBP.

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Liquid-liquid extraction of tungsteniv with tributyl phosphate

Cited by 18 publications

References 3 publications

Solvent extraction separation of Cr(VI)–Mo(VI)–W(VI), Zr(IV)–Hf(IV), and Se(IV)–Te(IV) with sulphoxides

Solvent extraction separation of Cr(VI)–Mo(VI)–W(VI), Zr(IV)–Hf(IV), and Se(IV)–Te(IV) with sulphoxides

Nonferrous metallurgy. II. Zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten

Liquid-Liquid Extraction of Tungsten (VI) from Hydrochloric Acid Solutions by Trioctyl Phosphine Oxide and Dihexyl Sulphoxide

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