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Effective solvent extraction of La, Ce and Pr from hydrochloric acid with a novel extractant N,N‐dihexyloxamic acid
Author(s) -
Guo Chuanglong,
Zhi Yonggang
Publication year - 2017
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5151
Subject(s) - hydrochloric acid , diluent , chemistry , extraction (chemistry) , stripping (fiber) , solvent extraction , nuclear chemistry , solvent , heptane , chromatography , inorganic chemistry , organic chemistry , materials science , composite material
BACKGROUND For the first time, N,N‐dihexyloxamic acid ( HA ) has been developed to extract La, Ce and Pr from hydrochloric acid solution in present work. RESULTS La, Ce and Pr can be extracted by HA in the pH range 1.3 to 2.0 using heptane as diluent. The extraction order was La < Ce < Pr. The separation factors were calculated to be 1.8 for La/Ce and for Ce/Pr. Based on slope analysis, all the rare earths ( REs ) were loaded in the form of REsCl 0 . 6 A 2 .4 ( HA ) 0.6 that may be a statistical expression of a mixture of complexes. Stripping tests showed that the loaded organic phase can be stripped by hydrochloric acid at medium acidity. CONCLUSION The extraction results obtained in the study suggest that N,N‐dihexyloxamic acid could serve as an effective extractant for La, Ce and Pr. © 2016 Society of Chemical Industry