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Citation: Xue Lizhen, Li Deqian. EXTRACTION OF SCANDIUM(Ⅲ),YTTRIUM(Ⅲ),LANTHANIDE(Ⅲ) AND IRON(Ⅲ) FROM HYDROCHLORIC ACID SOLUTIONS WITH DI-(2-ETHYLHEXYL) PHOSPHINIC ACID[J]. Chinese Journal of Applied Chemistry, ;1992, 9(4): 21-25. shu

EXTRACTION OF SCANDIUM(Ⅲ),YTTRIUM(Ⅲ),LANTHANIDE(Ⅲ) AND IRON(Ⅲ) FROM HYDROCHLORIC ACID SOLUTIONS WITH DI-(2-ETHYLHEXYL) PHOSPHINIC ACID

Xue Lizhen ,
Li Deqian ^,

1.
Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Corresponding author: Li Deqian,
Received Date: 9 January 1991
Available Online: 20 August 1991
Fund Project:

The extraction equilibrium of Sc(Ⅱ), Y(Ⅲ), Ln(Ⅲ)(Ln=Ho, Er, Yb, Lu) and Fe(Ⅲ) from HCl solutions with H(DEHP) in n-octane has been investigated. The order of extractability of the above elements is found as follows:Sc >> Fe > Lu > Yb > Er > Y > Ho. Y lies between Ho and Er. It is possible to separate Se(Ⅱ) from Fe(Ⅲ) and Ln(Ⅲ), and heavy lanthanide(Ⅲ) each other by H(DEHP).By the methods of slope analysis, saturation capacity and IR, NMR·spectra, the composition of extracted complexes of Sc(Ⅲ) and Yb(Ⅲ) with H(DEHP) has been determined to be Sc(HL₂)₃ and YbL₃(HL₂). The extraction mechanism of rare earths(Ⅲ) has been obtained.The equilibrium constants and thermodynamic functions of extraction reactions have also been calculated.
- diethylhexyl phosphinic acid,
- extraction mechanism,
- scandium(Ⅲ),
- yttrium(Ⅲ)
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