Separation of Ce and La from Synthetic Chloride Leach Solution of Monazite Sand by Precipitation and Solvent Extraction

Precipitation and solvent extraction experiments have been performed to recover light rare earths from simulated monazite sand chloride leach solutions. Precipitation conditions were obtained to recover Ce by adding NaClO as an oxidant. Among some cationic extractants (PC 88A, D2EHPA, Cyanex 272, LI...

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Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2014-12, Vol.45 (6), p.2009-2017
Main Authors: Banda, Raju, Jeon, Ho Seok, Lee, Man Seung
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Chlorides
Exact sciences and technology
Extractive metallurgy
Leaching
Materials Science
Metallic Materials
Metals. Metallurgy
Monazite sands
Nanotechnology
Polycarbonates
Precipitation
Precipitation hardening
Production of metals
Rare earth metals
Sand & gravel
Separation
Solvent extraction
Solvent extraction processes
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:Precipitation and solvent extraction experiments have been performed to recover light rare earths from simulated monazite sand chloride leach solutions. Precipitation conditions were obtained to recover Ce by adding NaClO as an oxidant. Among some cationic extractants (PC 88A, D2EHPA, Cyanex 272, LIX 63), PC 88A showed the best performance to separate La from the resulting chloride solution. Furthermore, the mixture of PC 88A with other solvating (TBP, TOPO) and amine extractants (Alamine 336, Aliquat 336) was tested to increase the separation factor of La from Pr and Nd. The use of mixed extractants greatly enhanced the separation of La from the two other metals. McCabe–Thiele diagrams for the extraction of Pr and Nd with the PC 88A/Alamine 336 mixture were constructed.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-014-0124-x