Solvent extraction kinetics of rare earth elements

Jinzhang Gao; Bo Peng; Haiyan Fan; Jingwan Kang

doi:10.1016/0039-9140(96)01954-6

Solvent extraction kinetics of rare earth elements

Jinzhang Gao, Bo Peng, Haiyan Fan, Jingwan Kang

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The kinetics of solid liquid extraction of rare earth elements (RE) (La, Ce, Sm, Dy and Yb) were studied with 1-(2-pyridylazo)-2-naphthol (PAN) at 60°C using paraffin wax as a diluent. The rate of extraction is first order with respect to metal ion and hydrogen ion in the aqueous phase and second order with respect to the extractant in the organic phase. The rate- determining step is the formation of an [RE(PAN)₂]⁺ complex between RE³⁺ and PAN in the aqueous phase. The rate constant for the extraction was found to be about 10¹¹ 1 mol^-1 s^-1. The temperature dependence of extraction rate was determined and the activation parameters were calculated.

Original language	English
Pages (from-to)	1721-1725
Number of pages	5
Journal	Talanta
Volume	43
Issue number	10
DOIs	https://doi.org/10.1016/0039-9140(96)01954-6
Publication status	Published - Oct 1996

Keywords

1-(2-Pyridylazo)-2-naphthol
Kinetics
Rare Earths
Solid liquid extraction

ASJC Scopus subject areas

Analytical Chemistry

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abstract = "The kinetics of solid liquid extraction of rare earth elements (RE) (La, Ce, Sm, Dy and Yb) were studied with 1-(2-pyridylazo)-2-naphthol (PAN) at 60°C using paraffin wax as a diluent. The rate of extraction is first order with respect to metal ion and hydrogen ion in the aqueous phase and second order with respect to the extractant in the organic phase. The rate- determining step is the formation of an [RE(PAN)2]+ complex between RE3+ and PAN in the aqueous phase. The rate constant for the extraction was found to be about 1011 1 mol-1 s-1. The temperature dependence of extraction rate was determined and the activation parameters were calculated.",

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AU - Gao, Jinzhang

AU - Peng, Bo

AU - Fan, Haiyan

AU - Kang, Jingwan

PY - 1996/10

Y1 - 1996/10

N2 - The kinetics of solid liquid extraction of rare earth elements (RE) (La, Ce, Sm, Dy and Yb) were studied with 1-(2-pyridylazo)-2-naphthol (PAN) at 60°C using paraffin wax as a diluent. The rate of extraction is first order with respect to metal ion and hydrogen ion in the aqueous phase and second order with respect to the extractant in the organic phase. The rate- determining step is the formation of an [RE(PAN)2]+ complex between RE3+ and PAN in the aqueous phase. The rate constant for the extraction was found to be about 1011 1 mol-1 s-1. The temperature dependence of extraction rate was determined and the activation parameters were calculated.

AB - The kinetics of solid liquid extraction of rare earth elements (RE) (La, Ce, Sm, Dy and Yb) were studied with 1-(2-pyridylazo)-2-naphthol (PAN) at 60°C using paraffin wax as a diluent. The rate of extraction is first order with respect to metal ion and hydrogen ion in the aqueous phase and second order with respect to the extractant in the organic phase. The rate- determining step is the formation of an [RE(PAN)2]+ complex between RE3+ and PAN in the aqueous phase. The rate constant for the extraction was found to be about 1011 1 mol-1 s-1. The temperature dependence of extraction rate was determined and the activation parameters were calculated.

KW - 1-(2-Pyridylazo)-2-naphthol

KW - Kinetics

KW - Rare Earths

KW - Solid liquid extraction

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Solvent extraction kinetics of rare earth elements

Abstract

Keywords

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