Palladium Extraction from Nitric Acid Solutions by LIX 84 and LIX 860-I

Elizalde, M.P.; Rúa, María del Sol; Menoyo, B.

doi:10.1080/07366299.2019.1674469

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…Commercial-grade extractants LIX 84 (compound 52) and LIX 860-I (compound 57), dissolved in toluene, can extract up to 99% Pd (II) from nitric acid media in the presence of Cu (II), which is due to the stability of PdL 2 complexes in the organic phase [77]. The quantitative extraction of palladium requires a higher concentration of extractant 57 (3.4 mmol L −1 ) compared to 52 (1.4 mmol L −1 ).…”

Section: Noble Metalsmentioning

confidence: 99%

Chelating Extractants for Metals

Yudaev

Chistyakov

2022

Metals

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In the present review, works on the classes of chelating extractants for metals, compounds with several amide and carboxyl groups, azomethines, oximes, macrocyclic compounds (crown ethers and calixarenes), phenanthroline derivatives, and others are systematized. This review focuses on the efficiency and selectivity of the extractants in the recovery of metals from industrial wastewater, soil, spent raw materials, and the separation of metal mixtures. As a result of this study, it was found that over the past seven years, the largest number of works has been devoted to the extraction of heavy metals with amino acids (16 articles), azomethines and oximes (12 articles), lanthanids with amide compounds (15 articles), lanthanides and actinides with phenanthroline derivatives (7 articles), and noble metals with calixarenes (4 articles). Analysis of the literature showed that amino acids are especially effective for extracting heavy metals from the soil; thiodiglycolamides and aminocalixarenes for extracting noble metals from industrial waste; amide compounds, azomethines, oximes, and phenanthroline derivatives for extracting actinides; amide compounds for extracting lanthanides; crown ethers for extracting radioactive strontium, rhenium and technetium. The most studied parameters of extraction processes in the reviewed articles were the distribution ratios and separation factors. Based on the reviewed articles, it follows that chelate polydentate compounds are more efficient compounds for the extraction of metals from secondary resources compared to monodentate compounds.

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Section: Noble Metalsmentioning

confidence: 99%