Extraction

Craig, Lyman C.

doi:10.1021/ac60049a010

Cited by 7 publications

(1 citation statement)

References 24 publications

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“…20 Batchwise multistage extraction has been classically known as Craig's extraction method, and can be evaluated according to chromatographic analysis. [21][22][23][24] Recently, there have been reports on the solvent extraction studies concerning Craig's method. [25][26][27] The advantages of batchwise multistage extraction are that small volumes of sample solutions are accessible and experiments can be performed by one person.…”

Section: Introductionmentioning

confidence: 99%

Separation of Light and Middle Lanthanides Using Multistage Extraction with Diglycolamide Extractant

2021

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We investigated the chemical behavior of lanthanides (Ln) by multistage extraction. Using 10 aqueous phases with Ln and 3 organic phases, we drew the breakthrough curves for light and middle Ln. Our study reveals that the limit of metal extraction depends on their D values and the metal concentration employed in experiments. From the multistage extractions of 15 stage aqueous phases and 15 stage organic phases, three curves (extraction curves, back-extraction curves, and separation curves) were obtained. Setting appropriate conditions, adequate separation of light Ln from middle ones can be achieved. As an example, under the condition of the separation curve experiment (aqueous phase: 0.5 M HNO3, organic phase: 0.1 M TDDGA (N,N,N′,N′-tetradecyl-diglycolamide) in n-dodecane), the recovery of more than 99% of Sm in the organic phase with less than 1% of Nd can be obtained, even in the case of two metals adjacent to each other in the Ln series.

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