scholarly journals Application of Ionic Liquids in Solvent Extraction of Platinum Group Metals

2020 ◽  
Vol 27 (1) ◽  
pp. 1-24
Author(s):  
Mochamad L. FIRMANSYAH ◽  
Wataru YOSHIDA ◽  
Takafumi HANADA ◽  
Masahiro GOTO
Keyword(s):  
Ionic Liquids ◽  
Solvent Extraction ◽  
Platinum Group Metals ◽  
Platinum Group

SEPARATION OF P t (IV), P d (II) AND R h (III) FROM CHLORIDE SOLUTIONS BY MULTISTAGE SOLVENT EXTRACTION USING NITROGEN-CONTAINING EXTRACTANTS

2019 ◽  
Vol 85 (4) ◽  
pp. 5-10
Author(s):  
Irina S. Rudik ◽  
Olesya N. Katasonova ◽  
Olga B. Mokhodoeva ◽  
Tatyana A. Maryutina ◽  
Boris Ya. Spivakov ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Phase ◽  
Platinum Group Metals ◽  
Metal Extraction ◽  
Platinum Metals ◽  
Chloride Solutions ◽  
Water Fraction ◽  
Quantitative Extraction ◽  
Rotating Coiled Columns ◽  
Platinum Group

The possibility of Pd (II), Pt (IV), and Rh (III) separation from chloride solutions by solvent extraction in rotating coiled columns (RCC) is demonstrated. The reagents most frequently used in extraction of platinum metals were selected as extractants: trioctylamine (TOA), methyltrialkylammonium chloride (MTAA), tributylphosphate (TBP), N, N, N',N'-tetra-re-octyldiglyTOlamide (TODGA). The completeness of extraction of the platinum group metals from individual and mixed hydrochloric acidic and chloride solutions was studied depending on the nature and concentration of the extractant, acidity of the test solutions and other factors. Optimal conditions for the quantitative extraction of metals from model hydrochloric acidic and chloride solutions and subsequent selective separation at the stripping stage are specified. A scheme of multistaged extraction separation of Pd (II), Pt (IV), and Rh (III) from chloride solutions using a 0.05 M solution of MTAA in toluene as a stationary phase in RCC is proposed. The scheme includes extraction of Pd (II) and Pt (IV) ions from a chloride solution (0, 1 M HCl + 30 g/liter NT) into the organic phase with simultaneous separation of Rh(III) remaining in the aqueous phase, and sequential stripping of Pd (II) and Pt (IV) from the organic phase with a 0.01 M solution of thiourea in 0.1 M HCl and a 1 M solution of thiourea in 0.5 M HCl, respectively. The scheme was tested in separation of the platinum group metals from the technological solution of a given composition. The degree of metal extraction with a 0.05 M MTAA solution in toluene and sequential stripping with thiourea solutions is 99.5% for Rh (III), 99.9% for Pd (II), and 97.4% for Pt (IV). The separated water fractions of rhodium and platinum after leaving the column did not contain impurities of other platinum metals whereas the water fraction of palladium contained 0.5% Pt.

Highly selective separation of individual platinum group metals (Pd, Pt, Rh) from acidic chloride media using phosphonium-based ionic liquid in aromatic diluent

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62717-62728 ◽  
Author(s):  
Viet Tu Nguyen ◽  
Jae-chun Lee ◽  
Alexandre Chagnes ◽  
Min-seuk Kim ◽  
Jinki Jeong ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solvent Extraction ◽  
High Purity ◽  
Selective Separation ◽  
Platinum Group Metals ◽  
Aromatic Solvent ◽  
Acidic Chloride ◽  
Platinum Group ◽  
Cyphos Il 101

An effective solvent extraction-based method has been developed to recover individually platinum group metals (Pd, Pt, and Rh) with high purity from acidic chloride media using phosphonium-based ionic liquid Cyphos IL 101 in aromatic solvent.

scholarly journals A Combined Deep Eutectic Solvent–Ionic Liquid Process for the Extraction and Separation of Platinum Group Metals (Pt, Pd, Rh)

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7204
Author(s):  
Olga Lanaridi ◽  
Sonja Platzer ◽  
Winfried Nischkauer ◽  
Andreas Limbeck ◽  
Michael Schnürch ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Mixed Model ◽  
Deep Eutectic Solvent ◽  
Precious Metals ◽  
Platinum Group Metals ◽  
Environmentally Benign ◽  
Extraction Capacity ◽  
Acidic Solutions ◽  
Extraction And Separation ◽  
Platinum Group

Recovery of platinum group metals from spent materials is becoming increasingly relevant due to the high value of these metals and their progressive depletion. In recent years, there is an increased interest in developing alternative and more environmentally benign processes for the recovery of platinum group metals, in line with the increased focus on a sustainable future. To this end, ionic liquids are increasingly investigated as promising candidates that can replace state-of-the-art approaches. Specifically, phosphonium-based ionic liquids have been extensively investigated for the extraction and separation of platinum group metals. In this paper, we present the extraction capacity of several phosphonium-based ionic liquids for platinum group metals from model deep eutectic solvent-based acidic solutions. The most promising candidates, P66614Cl and P66614B2EHP, which exhibited the ability to extract Pt, Pd, and Rh quantitively from a mixed model solution, were additionally evaluated for their capacity to recover these metals from a spent car catalyst previously leached into a choline-based deep eutectic solvent. Specifically, P66614Cl afforded extraction of the three target precious metals from the leachate, while their partial separation from the interfering Al was also achieved since a significant amount (approx. 80%) remained in the leachate.

Recovery of platinum group metals using magnetic nanoparticles modified with ionic liquids

2020 ◽  
Vol 248 ◽  
pp. 117049 ◽  
Author(s):  
Olga Mokhodoeva ◽  
Valery Shkinev ◽  
Valeriia Maksimova ◽  
Rustam Dzhenloda ◽  
Boris Spivakov
Keyword(s):  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Platinum Group Metals ◽  
Platinum Group
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