It is proposed that a method to isolate at least 99% of the Pd, Pt, and Rh present in catalytic converters.
📌 3 Key Takeaways
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Objective & Hypothesis:The growing use of platinum, palladium and rhodium (PGM) in metallurgy, jewelry and chemical industrial applications results in the necessity of fast and accurate a method for the determination of PGM, not only in natural sources, but also in recyclable materials, such as concentrates, anode slime, polish waste and catalytic converters.
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Key Findings & Data:In this study, the performance of the nickel sulphide (NiS) fire assay of PGM from mixtures of catalytic converters (e.g., gasoline and diesel engine catalytic converters) is investigated by assessing the effects of various flux ratios and reaction parameters on metals recovery.
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Conclusion & Impact:It is proposed that a method to isolate at least 99% of the Pd, Pt, and Rh present in catalytic converters.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Nickel sulfide · fire assay · platinum
Abstract
The growing use of platinum, palladium and rhodium (PGM) in metallurgy, jewelry and chemical industrial applications results in the necessity of fast and accurate a method for the determination of PGM, not only in natural sources, but also in recyclable materials, such as concentrates, anode slime, polish waste and catalytic converters. In this study, the performance of the nickel sulphide (NiS) fire assay of PGM from mixtures of catalytic converters (e.g., gasoline and diesel engine catalytic converters) is investigated by assessing the effects of various flux ratios and reaction parameters on metals recovery. We found that optimum recovery was achieved with 57.5 g of flux (0.40 w/w ratio, B2O3:Na2O), 6.36 g (as 5 g Ni) nickel oxide and 5 g sulfur (1.0 w/w ratio, Ni:S) for five gram of sample, reacted for 90 min at 975°C. To identify the optimum condition, reference standards such as NIST SRM 2557 (honeycomb type) were used to compare efficiencies; the results were consistent with certified values. It is proposed that a method to isolate at least 99% of the Pd, Pt, and Rh present in catalytic converters.
MORCALI, M. H., AKMAN, S., YÜCEL, O. (2014). DETERMINATION OF PLATINUM, PALLADIUM AND RHODIUM BY NICKEL SULPHIDE FIRE ASSAY (PRE-CONCENTRATION) METHOD AND ITS OPTIMIZATION. Sigma Mühendislik ve Fen Bilimleri Dergisi, Cilt: 32 - Sayı: 2, 211–220. https://ajindex.com/articles/419440
Fornalczyk A., Saternus M., “Catalytic Converters as a Source of Platinum”, Metalurgija, 50,4,261-264, 2011
Aktas S., Morcali M.H., “Platinum recovery from dilute platinum solutions using activated carbon”, Transactions of Nonferrous Metals Society of China, 21,11,2554-2558, 2011
Alonso E., Field F.R., Kirchain R.E. “Platinum availability for future automotive technologies”, Environmental Science and Technology, 46,23,12986-12993, 2012
Resano M., Garcia-Ruiz E., Mcintosh K.S., Vanhaecke F., “Laser ablation-inductively coupled plasma-dynamic reaction cell-mass spectrometry for the determination of platinum group metals and gold in NiS buttons obtained by fire assay of platiniferous ores”, Journal of Analytical Atomic Spectrometry, 23,12,1599-1609, 2008
Juvonen R., “Analysis of gold and the platinum group elements in geological samples”, Helsinki: Geological Survey of Finland,1999
Juvonen R., Lakomaa T., Soikkeli L., “Determination of gold and the platinum group elements in geological samples by ICP-MS after nickel sulphide fire assay: difficulties encountered with different types of geological samples”, Talanta, 58,3,595-603, 2002
Jimenez De Aberasturi D., Pinedo R., Ruiz De Larramendi I., Ruiz De Larramendi J.I., Rojo T., “Recovery by hydrometallurgical extraction of the platinum-group metals from car catalytic converters”, Minerals Engineering, 24,6,505-513, 2011
Harjanto S., Yucai C., Atsushi S., et al., “Leaching of Pt, Pd and Rh from automotive catalyst residue in various chloride based solutions”, Materials Transactions, 47,1,129-135, 2006
Gupta J.G.S., “Determination of trace and ultra-trace amounts of noble-metals in geological and related materials by graphite-furnace atomic-absorption spectrometry after separation by ion-exchange or co-precipitation with tellurium”, Talanta, 36,6,651-656, 1989
Payette M., “The determination of platinum, palladium and rhodium in autocatalyst: an exploration of sample preparation techniques for the rapid sequential multi-elemental ICP-MS analysis” Canada: Laurentian University in Department of Chemistry and Biochemistry, 1997
Jorge A.P.D., Enzweiler J., Shibuya E.K., et al., “Platinum-group elements and gold determination NiS fire assay buttons by UV laser ablation ICP-MS”, Geostandards Newsletter-the Journal of Geostandards and Geoanalysis,, 22,1,47-55, 1998
Hageluken C., “Precious metals process catalysts-material flows and recycling” Chimica Oggi, 24,