Solvent extraction of yttrium and rare earth elements from copper pregnant leach solutions using Primene JM-T

J Brent Hiskey, Rebecca Grace Copp

Research output: Contribution to journalArticle

Abstract

The solvent extraction of yttrium and rare earth elements from copper pregnant leach solutions (PLS) using Primene JM-T, a primary aliphatic amine, has been studied. This investigation focused on the effect of extractant concentration to obtain a better understanding of the extraction mechanism. Copper bearing PLS from a leaching operation in Arizona was used as the feed solution in all experiments. Standard experimental conditions were 5 min contact time, 1:1 O:A phase ratio, kerosene as a diluent, and room temperature. The solution chemistry of the PLS was modeled using PHREEQC software. Primene JM-T concentrations in the organic phase ranged from 0.059–0.221 M (2–7.5% v/v). At 0.147 M Primene JM-T, yttrium extraction was 88.4% whereas the LREEs averaged about 95% and the HREEs a little lower at 92%. It was shown that approximately 2.4 mol of Primene JM-T are required per mole of yttrium or rare earth metal at extractant concentrations ranging from 0.07 to 0.10 M. In this Primene JM-T concentration range, it appears that a mixture of metal sulfate complexes is being extracted. At low Primene JM-T concentrations, Me(SO4)3 3– is the dominant species being extracted. As extractant concentrations increases, the reaction appears to favor of the extraction of Me(SO4)2 .

Original languageEnglish (US)
Pages (from-to)265-270
Number of pages6
JournalMinerals Engineering
Volume125
DOIs
StatePublished - Aug 15 2018

Fingerprint

Yttrium
yttrium
Solvent extraction
Rare earth elements
Copper
rare earth element
copper
Rare Earth Metals
Bearings (structural)
Kerosene
Metals
Rare earths
Leaching
Sulfates
Amines
leaching
sulfate
software
metal
experiment

Keywords

  • Copper PLS
  • Primary amine
  • Primene JM-T
  • Rare earth elements
  • Solvent extraction
  • Yttrium

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Chemistry(all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering

Cite this

Solvent extraction of yttrium and rare earth elements from copper pregnant leach solutions using Primene JM-T. / Hiskey, J Brent; Copp, Rebecca Grace.

In: Minerals Engineering, Vol. 125, 15.08.2018, p. 265-270.

Research output: Contribution to journalArticle

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