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.

Selective Separation of Platinum Group Metals via Sequential Transport through Polymer Inclusion Membranes Containing an Ionic Liquid Carrier

2020 ◽  
Vol 8 (30) ◽  
pp. 11283-11291
Author(s):  
Adroit T. N. Fajar ◽  
Takafumi Hanada ◽  
Mochamad L. Firmansyah ◽  
Fukiko Kubota ◽  
Masahiro Goto
Keyword(s):  
Ionic Liquid ◽  
Selective Separation ◽  
Platinum Group Metals ◽  
Liquid Carrier ◽  
Platinum Group

scholarly journals SORPTION EXTRACTION OF PLATINUM METALS FROM CHLORIDE – SULFATE AND SULFATE ACIDIC SOLUTIONS BY POLYACRYLONITRILE FIBERS FIBAN

2019 ◽  
Vol 62 (11) ◽  
pp. 117-125
Author(s):  
Svetlana V. Drogobuzhskaya ◽  
Anna A. Shirokaya ◽  
Sergey A. Solov’ev
Keyword(s):  
Sulfuric Acid ◽  
Electronic Spectra ◽  
Chloride Ion ◽  
Platinum Group Metals ◽  
Platinum Metals ◽  
Sulfate Solutions ◽  
Acidic Chloride ◽  
Chloride Sulfate ◽  
Platinum Group ◽  
Degree Of Extraction

The sorption of platinum group metals by fibers FIBAN AK-22 and A-5 from acidic chloride-sulfate and sulfate solutions was studied under static conditions. FIBAN contains primary, secondary and tertiary amino groups. The degree of extraction of platinum metals is calculated. The optimal conditions of sorption from the model solutions are determined. The influence of the temperature regime on the sorption process is established. It is shown, that all platinum group metals are quantitatively extracted from acidic chloride-sulfate solutions by fiber FIBAN AK-22 regardless of the concentration of chloride ions, H2SO4 and temperature absorption. Extraction exceeds 96% at a concentration of sulfuric acid up to 3 mol/dm3 and chloride ion up to 1 mol/dm3. Extraction of osmium is maximum at a concentration of sulfuric acid and chloride ion 3 mol/dm3. The degree of extraction of platinum group metals on FIBAN A-5 is from 50 to 85% and is maximum at elevated temperature and concentrations of H2SO4 and chloride ion 1 mol/dm3 and decreases with increasing concentration of sulfuric acid. Electronic spectra of platinum metal solutions were obtained and the state of platinum metals in chloride and chloride-sulfate solutions was estimated. After the introduction of sulfuric acid into the system, changes in the electronic spectra of platinum (IV), ruthenium and osmium solutions were noted. The spectra of palladium, rhodium and iridium solutions have not changed. When extracting platinum metals from production sulfate solutions of complex composition with a high content of macro components (Ni, Cu, Fe, Te and Se), the efficiency of fiber AK-22 is shown. The advantages of fiber FIBAN AK-22 over FIBAN A-5 are noted.

High Purity Platinum-Group Metals

Pt Platinum ◽  
1985 ◽  
pp. 24-65
Author(s):  
G. J. Bernfeld ◽  
A. J. Bird ◽  
R. I. Edwards ◽  
Hartmut Köpf ◽  
Petra Köpf-Maier ◽  
...  
Keyword(s):  
High Purity ◽  
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.

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