The Solvent Extraction of Uranium(VI) from Carbonate Solutions<sup>1</sup>

Clifford, W.E.; Bullwinkel, E.P.; McClaine, Leslie A.; Noble, Paul

doi:10.1021/ja01545a014

Cited by 30 publications

(8 citation statements)

References 5 publications

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“…Only molybdenum, if present, and vanadium in the ore could be troublesome for the uranium purification (Lunt et al, 2007;Clifford et al, 1958). Normally, molybdenum does not coprecipitate with uranium and can be removed by bleeding after uranium precipitation (du Preez, 1989).…”

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

“…Several methods are used to remove vanadium from uranium (Lunt et al, 2007;Clifford et al, 1958). In commercial carbonate leach operations, it is common to remove vanadium by the addition of lead sulphate or ferrous sulphate to the leach solution.…”

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

“…When an ion exchange resin is used, vanadium could be separated from uranium by elevating the pH above 10 in the feed solution. However, uranium adsorption would be reduced significantly (Lunt, et al, 2007;Clifford et al, 1958). An SX method should have some advantages in regard to its flexibility of uranium concentration in the PLS and possible selectivity over vanadium and molybdenum.…”

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

“…An SX method should have some advantages in regard to its flexibility of uranium concentration in the PLS and possible selectivity over vanadium and molybdenum. However, SX has its own problems and currently, no satisfactory SX process has been found to recover uranium from carbonate leach solutions commercially despite some meaningful investigations of such (Sole et al 2011;Zontov, 2006;Carmen, 1986;Clifford et al 1958). …”

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

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Leaching behaviour and the solution consumption of uranium–vanadium ore in alkali carbonate–bicarbonate column leaching

Ghorbani

Montenegro²

2016

Hydrometallurgy

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Although heap leaching using sulfuric acid was introduced to the uranium industry in the 1950s, sodium carbonate-bicarbonate (alkaline) heap leaching of low-grade Ca-carbonate-rich uranium ores has recently gained popularity. This study presents the results of two column tests on a calcrete-type uranium-vanadium (carnotite) ore using a mixture of sodium carbonate and bicarbonate The column leach data was therefore fitted to a simplified first-order kinetic model using two approaches, a general form and a second based on the reagent consumption per unit mass of the initial valuable species (U and V). As reagent consumption is a key economic factor in the heap leaching process, having a kinetic leaching model incorporating reagent consumption would provide useful techno-economic information. In this regards a new leaching index of (β) is also introduced. Both approaches of the first order kinetic model provide a good agreement with the column testing data.

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Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

Section: Uranium and Vanadium Extractionmentioning

confidence: 99%

See 2 more Smart Citations

Leaching behaviour and the solution consumption of uranium–vanadium ore in alkali carbonate–bicarbonate column leaching

Ghorbani

Montenegro²

2016

Hydrometallurgy

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“…The surfactants sodium lauryl sulphate (NaLS) and cetyl trimethyl ammonium bromide (CTAB) were used as collectors for flotation of the first kind, while 8-hydroxyquinoline (oxine) was used as a precipitant in precipitate flotation of the second kind. Oxine was chosen because it has been sucessfully used in extraction of metal ions and in separation of uranium for analytical, recovery, and decontamination purposes (9)(10)(11)(12)(13)(14).…”

Section: Introductionmentioning

confidence: 99%

Separation of U(VI) from aqueous solutions by precipitate flotation with 8-quinolinol and surfactants

Shakir¹,

Benyamin²,

Aziz³

1984

Can. J. Chem.

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KAMAL SHAKIR, KAMAL BENYAMIN, and MOURAD AZIZ. Can. J. Chem. 62, 51 (1984). Foam separation investigations over the 2.5-10.5 pH range show that U(V1) can be successfully separated from aqueous solutions by precipitation with oxine and subsequent flotation of the precipitate, either in absence or in presence of surfactant collectors. Collectors tested were: cetyl trimethyl ammonium bromide (CTAB) and sodium lauryl sulphate (NaLS). The extent of removal depends on many factors and removals as high as 98% could be achieved when uranyl oxinate precipitate was floated, under certain controlled conditions, in the presence of CTAB. Factors affecting the percentage removal were investigated and the best conditions were selected. The results obtained are discussed in terms of the hydrolytic behaviour of U(V1).KAMAL SHAKIR, KAMAL BENYAMIN et MOURAD AZIZ. Can. J . Chem. 62, 51 (1984). Des etudes sur la skparation des mousses dans l'intervalle de pH allant de 2,5 h 10,5 revdent que le U(V1) peut Stre sCpark avec succ&s des solutions aqueuses par prtcipitation avec l'oxine et une flottation subskquente du precipite en presence ou non de collecteurs surfactants. Les collecteurs CtudiCs sont: le bromure de ~CtyltrimCthylammonium (BCTA) et le sel de sodium du sulfate de lauryle (NaLS). Le taux de skparation dCpend de plusieurs facteurs et on peut rCaliser une sCparation i 98% lorsqu'on fait flotter le prCcipitt d'oxinate d'uranyle dans certaines conditions contrblkes en presence de BCTA. On a CtudiC les facteurs qui influencent le pourcentage de sCparation et on a choisi les meilleurs conditions. On discute des rksultats obtenus en fonction du comportement hydrolytique de l'U(V1).[Traduit par le journal]

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Extraction of Inorganic Compounds into Organic Solvents

Diamond

Tuck

1960

Progress in Inorganic Chemistry

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The Solvent Extraction of Uranium(VI) from Carbonate Solutions¹

Cited by 30 publications

References 5 publications

Leaching behaviour and the solution consumption of uranium–vanadium ore in alkali carbonate–bicarbonate column leaching

Leaching behaviour and the solution consumption of uranium–vanadium ore in alkali carbonate–bicarbonate column leaching

Separation of U(VI) from aqueous solutions by precipitate flotation with 8-quinolinol and surfactants

Extraction of Inorganic Compounds into Organic Solvents

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The Solvent Extraction of Uranium(VI) from Carbonate Solutions1

Cited by 30 publications

References 5 publications

Leaching behaviour and the solution consumption of uranium–vanadium ore in alkali carbonate–bicarbonate column leaching

Leaching behaviour and the solution consumption of uranium–vanadium ore in alkali carbonate–bicarbonate column leaching

Separation of U(VI) from aqueous solutions by precipitate flotation with 8-quinolinol and surfactants

Extraction of Inorganic Compounds into Organic Solvents

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The Solvent Extraction of Uranium(VI) from Carbonate Solutions¹