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Behavior of sec-octylphenoxy acetic acid (CA-12) in yttrium recovery from high concentrated heavy rare earths mixture
- Source :
- Rare Metal Technology 2017 ISBN: 9783319510842
- Publication Year :
- 2017
- Publisher :
- Springer International Publishing, 2017.
-
Abstract
- The solvent extraction technique is the only industrial way used to separate and purificate yttrium from other rare earths. In order to improve this process several extractants have been tested during last years. In this work, the behavior of sec-octylphenoxy acetic acid (CA-12) in Yttrium recovery from high concentrated heavy rare earth mixture was investigated. Sodium hydroxide solution was used in order to presaponify organic phase composed by CA-12 and Tributyl phosphate (TBP) diluted in kerosene. In the investigated condition, TBP confirmed its role of phase modifier not significantly altering the extraction behavior of CA-12. The CA-12-TBP system showed a high affinity in extraction for lighter rare earths such as Sm, Eu, and Gd, leaving yttrium in aqueous phase. Using a feed concentration (∑ [RE]) of 1M, organic mixture is capable to extract around the 70% of metals in a single extraction test showing this extraction sequence Y < Lu < Yb < Tm < Er < Ho < Dy < Tb < Gd < Eu < Sm. Moreover for [CA-12] = 1.79 M and [RE] = 2M the instability of extraction system occurs. © 2017, The Minerals, Metals & Materials Society.
- Subjects :
- Liquid-liquid extraction
Rare earths
Solvent extraction
CA-12
Extraction (chemistry)
Inorganic chemistry
Aqueous two-phase system
chemistry.chemical_element
Yttrium
chemistry.chemical_compound
Acetic acid
chemistry
Liquid–liquid extraction
Sodium hydroxide
Phase (matter)
Rare earth
Tributyl phosphate
Nuclear chemistry
Subjects
Details
- Language :
- English
- ISBN :
- 978-3-319-51084-2
- ISBNs :
- 9783319510842
- Database :
- OpenAIRE
- Journal :
- Rare Metal Technology 2017 ISBN: 9783319510842
- Accession number :
- edsair.doi.dedup.....e81f51d06b269eef43f31be4758e4f0a