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 | |
| Publication status | Published - Oct 1996 |
| Externally published | Yes |
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Keywords
- 1-(2-Pyridylazo)-2-naphthol
- Kinetics
- Rare Earths
- Solid liquid extraction
ASJC Scopus subject areas
- Analytical Chemistry
- Spectroscopy
Cite this
Solvent extraction kinetics of rare earth elements. / Gao, Jinzhang; Peng, Bo; Fan, Haiyan; Kang, Jingwan.
In: Talanta, Vol. 43, No. 10, 10.1996, p. 1721-1725.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Solvent extraction kinetics of rare earth elements
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
UR - http://www.scopus.com/inward/record.url?scp=0030272072&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030272072&partnerID=8YFLogxK
U2 - 10.1016/0039-9140(96)01954-6
DO - 10.1016/0039-9140(96)01954-6
M3 - Article
VL - 43
SP - 1721
EP - 1725
JO - Talanta
JF - Talanta
SN - 0039-9140
IS - 10
ER -