Recovery of indium from sulfate solutions with D2EHPA in the presence of organic proton-donor additives

Recovery of indium from sulfate solutions with D2EHPA in the presence of organic proton-donor additives Full article

Journal

Hydrometallurgy
ISSN: 0304-386X

Output data

Year: 2022, Volume: 213, Pages: 105925 Pages count : 1 DOI: 10.1016/j.hydromet.2022.105925

Tags

Solvent extractionSulfate solutionsIndiumdi(2-ethylhexyl)phosphoric acidProton donor additivesStripping

Authors

Grigorieva N.A. ¹ , Fleitlikh I.Yu. ¹ , Tikhonov A.Ya. ² , Mamatyuk V.I. ² , Karpova E.V. ² , Logutenko O.A. ³

Affiliations

1	Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
2	N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences
3	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences

Highlights • The state of D2EHPA in CCl4 in the presence of proton-donor additives HA was studied. • The interaction between D2EHPA (HR) and HA was shown to occur. • Antagonistic extraction of indium by mixtures of D2EHPA and additives is observed. • D2EHPA and 2-ethylhexanol system is most efficient for In extraction and stripping. Abstract Di(2-ethylhexyl)phosphoric acid (D2EHPA, HR) is widely used for solvent extraction of indium from acidic leaching solutions, but indium stripping from the loaded organic phase is difficult because of the high affinity of indium for the extractant. Adding proton-donor additives (HA) to the D2EHPA solution is a way to achieve high stripping efficiency for indium. In this work, monocarboxylic acids, aliphatic alcohols, and phenol derivatives were used as additives. Nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy of the organic phases confirm the formation of intermolecular associates (H-complexes) between all additives and D2EHPA. In the case of alcohols and substituted phenols, the interaction of oxygen atoms of alcohols or phenols with the proton of the hydroxyl group of D2EHPA is predominant, while in the case of monocarboxylic acids, an interaction between the hydroxyl proton of the acid and the Pdouble bondO group of D2EHPA mainly occurs. Despite the high In distribution ratio with D2EHPA (100−1000), in all cases investigated the introduction of additives into the organic phase led to an antagonistic extraction effect, however it facilitated efficient In stripping from the loaded organic phase. This effect depends significantly on the type and structure of the additive. Indium extraction in the presence of additives decreases in the series 4-bromophenol >4-t-butylphenol > octanol, 2-ethylhexanol >4-nitrophenol >2-nitrophenol >2,6-di-t-butylphenol, octanoic acid > Versatic 10. Extraction systems containing D2EHPA and 2-ethylhexanol can be used to recover indium from various industrial solutions, in particular, from those derived from lead‑zinc production and from liquid crystal display panel wastes.

Grigorieva N.A. , Fleitlikh I.Y. , Tikhonov A.Y. , Mamatyuk V.I. , Karpova E.V. , Logutenko O.A.
Recovery of indium from sulfate solutions with D2EHPA in the presence of organic proton-donor additives
Hydrometallurgy. 2022. V.213. P.105925. DOI: 10.1016/j.hydromet.2022.105925 WOS Scopus РИНЦ OpenAlex

Submitted:	Apr 29, 2022
Accepted:	Jun 8, 2022
Published online:	Jun 11, 2022

Web of science:	WOS:000833505500009
Scopus:	2-s2.0-85132242554
Elibrary:	48721261
OpenAlex:	W4281769647

DB	Citing
OpenAlex	16
Web of science	11
Scopus	12
Elibrary	9