Yttrium and europium separation by solvent extraction with undiluted thiocyanate ionic liquids.

ABSTRACT: An yttrium/europium oxide obtained by the processing of fluorescent lamp waste powder was separated into its individual elements by solvent extraction with two undiluted ionic liquids, trihexyl(tetradecyl)phosphonium thiocyanate, [C101][SCN], and tricaprylmethylammonium thiocyanate, [A336][SCN]. The best extraction performances were observed for [C101][SCN], by using an organic-to-aqueous volume ratio of 1/10 and four counter-current extraction stages. The loaded organic phase was afterwards subjected to scrubbing with a solution of 3 mol L^-1 CaCl₂ + 0.8 mol L^-1 NH₄SCN to remove the co-extracted europium. Yttrium was quantitatively stripped from the scrubbed organic phase by deionized water. Yttrium and europium were finally recovered as hydroxid

SUBMITTER: Banda R 

PROVIDER: S-EPMC9060585 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature