Extraction behavior of trivalent lanthanoids and yttrium with bis (2,4,4-trimethylpentyl)octylphosphine oxide |
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| Authors: | M. L. P. Reddy M. S. Murali J. N. Mathur |
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| Affiliation: | (1) Regional Research Laboratory (CSIR), 696 019 Trivandrum, India;(2) Radiochemistry Division, Bhabha Atomic Research Centre, 400 085 Mumbai, India |
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| Abstract: | The extraction behavior of yttrium and trivalent lanthanoids has been investigated from thiocyanate solutions using bis(2,4,4-trimethylpentyl)octylphosphine oxide (CYANEX 925) in xylene as an extractant by tracer techniques. The results demonstrate that these trivalent metal ions are extracted as M(SCN)3•3CYANEX 925. The equalibrium constants of the extracted complexes have been deduced by non-linear regression analysis. The extraction behavior of trivalent lanthanoids and yttrium was found to be ambiguous since the distribution ratios of these metal ions are nonmonotinic function of atomic number (La
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