Synergistic Silver Extraction from Hydrochloric Acid Solutions with Triisobutylphosphine Sulfide in the Presence of Organic Proton-Donor Additives

Synergistic Silver Extraction from Hydrochloric Acid Solutions with Triisobutylphosphine Sulfide in the Presence of Organic Proton-Donor Additives Full article

Journal

Solvent Extraction and Ion Exchange
ISSN: 0736-6299 , E-ISSN: 1532-2262

Output data

Year: 2019, Volume: 37, Number: 1, Pages: 96-109 Pages count : 14 DOI: 10.1080/07366299.2019.1592925

Tags

Hydrochloric acid; silver chloride; solvent extraction; triisobutylphosphine sulfide; organic proton-donor additives; synergistic effect; stripping

Authors

Fleitlikh I.Yu. ¹ , Grigorieva N.A. ¹ , Pavlenko N.I. ¹ , Kondrasenko A.A. ¹ , Tikhonov A.Ya. ² , Logutenko O.A. ³

Affiliations

1	(Данные Web of science) Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Inst Chem & Chem Technol SB RAS, Academgorodok 50-24, Krasnoyarsk 660036, Russia
2	(Данные Web of science) Russian Acad Sci, Siberian Branch, NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk, Russia
3	(Данные Web of science) Russian Acad Sci, Siberian Branch, Inst Solid State Chem & Mechanochem, Novosibirsk, Russia

Silver chloride extraction from hydrochloric acid solutions with triisobutylphosphine sulfide (CYANEX 471, L) in the presence of organic proton-donor additives (HR) was studied. Both alkyl-, bromo-, nitro-substituted phenols, and organic acids of various structures were used as additives. A new synergistic effect (S) was found to take place in the presence of the additives. The degree of the synergistic effect in the systems containing phenols decreases in the series 4-nitrophenol > 4-bromophenol > 4-tert-butylphenol > 2,6-dimethylphenol > 2-methyl-6-cyclohexylphenol > 2,6-bis(tert-butyl) phenol. In the systems containing organic acids, the following series is observed: dinonylnaphthalenesulfonic acid (DNNSA) > 4-tert-butylphenol > caprylic acid > di(2-ethylhexyl)phosphoric acid > bis(2,4,4-trimethylpentyl)phosphinic acid. Based on the analysis of the extraction data and the IR and NMR spectra of the extracts, it was concluded that an increase in the silver extraction with CYANEX 471 in the presence of HR is due to the formation of the compound [AgCl center dot 2L center dot HR] in the organic phase. It was shown that a mixture of CYANEX 471 and 4-tert-butylphenol can be used for the highly selective extraction of silver from hydrochloric acid solutions containing metal impurities (Ni, Cu, Co, Zn, Fe(III), and Na). The mixtures of CYANEX 471 with alkylphenols or DNNSA, in which the high synergistic effects (S >= 10 and >= 50, respectively) take place, can efficiently be used for processing different industrial silver chloride solutions.

Fleitlikh I.Y. , Grigorieva N.A. , Pavlenko N.I. , Kondrasenko A.A. , Tikhonov A.Y. , Logutenko O.A.
Synergistic Silver Extraction from Hydrochloric Acid Solutions with Triisobutylphosphine Sulfide in the Presence of Organic Proton-Donor Additives
Solvent Extraction and Ion Exchange. 2019. V.37. N1. P.96-109. DOI: 10.1080/07366299.2019.1592925 WOS Scopus РИНЦ OpenAlex

Published print:	Jan 2, 2019
Published online:	Apr 17, 2019

Web of science:	WOS:000466090700001
Scopus:	2-s2.0-85064626904
Elibrary:	38673437
OpenAlex:	W2938086061

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Web of science	4
Scopus	5
Elibrary	5
OpenAlex	5