Recovery and extraction of platinum from spent catalysts: A review
The general methods of extracting and separating platinum from spent catalysts include pyrometallurgy and hydrometallurgy.Web
اقرأ أكثرMetals smelting-collection method for recycling of platinum group
However, hydrometallurgical and pyrometallurgical methods have been classified as the dominant tendencies. These methods have been widely employed for effective separation and extraction of PGMs by different corporations and industries such as Umicore, Johnson Matthey, Hereaus, and Nippon (Chen et al., 2014). The waste …Web
اقرأ أكثرSeparation of platinum, palladium and rhodium from
Demand for platinum (Pt), palladium (Pd) and rhodium (Rh) as parts of platinum group metals (PGMs) has continued to increase as a consequence of increase in their applications. Various extraction methods have been developed to produce the metals including leaching-based process using halides, sulfate–chloride and cyanide, which …Web
اقرأ أكثرHydrometallurgical recovery/recycling of platinum by the leaching …
These materials are usually processed by pyro/hydrometallurgical processes consisting of thermal treatment followed by leaching, precipitation or solvent extraction. This paper reviews platinum leaching from such resources using acidic and alkaline solutions in the presence of oxidizing agents, such as nitric acid and hydrogen peroxide, sodium ...Web
اقرأ أكثرRecovery of Palladium from Spent Catalysts—A Critical
Consequently, the development of integrated environmentally-friendly and cost-effective hydrometallurgical processes for PGMs recycling typically count on this separation technique. ... Gupta B, Singh I (2013) Extraction and separation of platinum, palladium and rhodium using Cyanex 923 and their recovery from real samples. …Web
اقرأ أكثرNovel approach for recovery of palladium in spent catalyst from
Recovery by hydrometallurgical extraction of the platinum-group metals from car catalytic converters. Miner. Eng. (2011) J.G. Kim Material flow and industrial demand for palladium in Korea. Resour. Conserv. Recycl. (2013) J.-Y. Lee et al. Liquid–liquid extraction/separation of platinum(IV) and rhodium(III) from acidic chloride …Web
اقرأ أكثرRecovery of platinum from spent automotive catalyst based on
The route of Pt recovery from SAC mainly consists of three steps, including pretreatment, enrichment and refining, among which enrichment and refining are the key steps for the recovery of Pt from SAC [2, 19, 20].The enrichment of PGMs from SAC can be achieved through pyrometallurgical or hydrometallurgical methods [].Although the …Web
اقرأ أكثر(PDF) Refining Approaches in the Platinum Group Metal
Process Details Lonmin Platinum Anglo Platinum Impala Platinum Technology Precipitation Solvent extraction, SX Ion exchange, IX Feed 65–75% PGMs 30–50% PGMs 60–65% PGMsWeb
اقرأ أكثرRecovery of platinum group metals from spent automotive …
The common extraction process refers to pyrometallurgy combined with hydrometallurgy, where platinum group metal ores (e.g. Merensky Reef ore grades …Web
اقرأ أكثرA review on the recycling processes of spent auto
Recovery by hydrometallurgical extraction of the platinum-group metals from car catalytic converters. Miner. Eng. (2011) T.V. Acker Method Development for Determination of Platinum Group Metals using Tandem ICP-mass Spectrometry and Application to Measure their Dispersion in Urban Areas, Master dissertationWeb
اقرأ أكثرRecovery of platinum, palladium and rhodium from industrial …
The selective reactive extraction of platinum, palladium and rhodium from a 6 M HCI collector solution of spent autocatalysts and from a model solution containing large amounts of iron and nickel was investigated. ... This paper proposes a hydrometallurgical process to recover platinum from diesel catalysts, based on a first leaching step with ...Web
اقرأ أكثر[PDF] Recovery of Platinum from a Spent Automotive Catalyst …
Considering economics and environmental sustainability, recycling of critical metals from end-of-life devices should be a priority. In this work the hydrometallurgical treatment of a spent automotive catalytic converter (SACC) using HCl with CaCl2 as a leaching medium, and solvent extraction (SX) with a thiodiglycolamide derivative, is …Web
اقرأ أكثرEfficient Chloride Salt Extraction of Platinum Group Metals
We show that platinum (Pt) and palladium (Pd) can be efficiently removed from spent catalytic converters by means of a sintering process involving chloride salts. For Pt, mixing the crushed catalyst in an aqueous solution of chloride salts at catalyst/salt weight ratios ranging from 2.5 to 6.7, followed by drying, and 2-h sintering in the reactor furnace …Web
اقرأ أكثرSeparations | Free Full-Text | Research on Hydrometallurgical
Hydrometallurgical techniques are of importance, as well as physical sorting and pyrometallurgical techniques. Hydrometallurgical techniques, such as electrolytic refining, leaching, precipitation, solvent extraction, ion exchange, membrane separation, and floatation, have been extensively employed to recover critical metals and to remove ...Web
اقرأ أكثرRecovery of palladium from a spent industrial catalyst through …
A hydrometallurgical approach to recover palladium from a spent industrial hydrogenating catalyst is described. The work aimed to enhance palladium and minimize aluminum recoveries.The efficiency of chloride leaching has been evaluated by varying the most determinant parameters affecting the leaching process. HCl solutions and mixtures …Web
اقرأ أكثرAn innovative hybrid hydrometallurgical approach for precious …
The current paper presents an innovative hydrometallurgical methodology for recovery of precious metals from different waste streams. The used hydrometallurgical process, which has been already patented (Birloaga and Franc Veglio, 2019), consists of a single leaching system (HCl, H 2 O 2 and C 2 H 4 O 2) of all elements and then …Web
اقرأ أكثر(PDF) Platinum Recovery Techniques for a Circular Economy
pyro/hydrometallurgical Pt recycling technologies used t he existing facilities of the same . ... gas mixture to completely extract platinum from the catalysts. A r eco ver y o f up to 9 5.9 % o f ...Web
اقرأ أكثرMetals | Free Full-Text | A Review of Recovery of Palladium from …
Hydrometallurgical methods such as chloride leaching with oxidants possess a high selectivity of palladium and low consumption of energy, and are cost-effective and flexible for different volume feeds compared with pyrometallurgical methods. ... Ramachandra used LIX 841 and Alamine 336 to extract platinum and palladium (A/O = …Web
اقرأ أكثر(PDF) KELL HYDROMETALLURGICAL PROCESS FOR EXTRACTION OF PLATINUM …
It has been shown to provide high (>95 per cent) and selective extraction efficiencies for the key valuable metals, i.e. Pt, Pd, Rh, Au, Ni, Co, Cu. Discover the world's research 25+ million membersWeb
اقرأ أكثرSingle-Step Hydrometallurgical Method for the Platinum Group …
The hydrometallurgical process consists of two main stages, the leaching stage, where metals are leached from their ores in an aqueous media, and the …Web
اقرأ أكثرRecent Advances in Platinum and Palladium Solvent Extraction …
To concentrate and/or purify the leaching solutions loaded with PGMs, solvent extraction (SX) (or liquid–liquid extraction) is one of the unit operations mostly applied in hydrometallurgy to recover palladium and platinum from leaching solutions of spent catalysts . Accordingly, SX is the chosen unit operation to be explored in this review.Web
اقرأ أكثرRecovery by hydrometallurgical extraction of the platinum-group …
After verified the presence and distribution of PGMs in the samples, a hydrometallurgical extraction method was studied to recover those PGMs. Section snippets Materials. ... (TWCs) have focused on the extraction of platinum group metals (PGMs), with less characterization and analysis of their properties. This can lead to an …Web
اقرأ أكثرMetals extraction processes from electronic waste
Therefore, e-waste management is an essential issue. In this study, we critically have reviewed the existing extraction processes and compared among different processes such as physical, biological, supercritical fluid technologies, pyro and hydrometallurgical, and hybrid methods used for metals extraction from e-waste.Web
اقرأ أكثرRecovery of Platinum Group Metals from Leach Solutions of …
Platinum group metals (PGMs) play a key role in modern society as they find application in clean technologies and other high-tech equipment. Spent catalytic converters as a secondary resource contain higher PGM concentrations and the recovery of these metals via leaching is continuously being improved but efforts are also directed at the …Web
اقرأ أكثرRecovery of platinum group metals from spent automotive …
Hydrometallurgical extraction is favorable, due to lower temperature conditions required, less energy consumed, higher purity achieved, potential co-extractions, and better process control. ... Recovery by hydrometallurgical extraction of the platinum-group metals from car catalytic converters. Miner. Eng., 24 (2011), pp. 505-513, …Web
اقرأ أكثرRecovery by hydrometallurgical extraction of the platinum-group …
The extraction of PGMs from waste TWCs using hydrochloric acid (HCl) has been extensively researched. However, the addition of oxidizing agents like H 2 O 2 …Web
اقرأ أكثرPlatinum Group Metal (PGM) Mineralisation of …
A binary mixture containing 12.5% P2O5 and 42.5% SiO2 yielded a concentrate containing 20.15% P2O5 and 33.5% SiO2. Using the bio-flotation process with Staphylococcus aureus and the optimal ...Web
اقرأ أكثرSolvent extraction of platinum using amine based extractants in
The former IL is very well known for decades in hydrometallurgical solvent extraction, named as Aliquat ®336, and its properties towards PGMs recovery from hydrometallurgical solutions have been ...Web
اقرأ أكثرCrystals | Free Full-Text | Platinum Group Metals: Green
Albazi, S. Platinum metals-solution chemistry and separation methods (ion-exchange and solvent extraction). Talanta 1984, 31, 815–836. [Google Scholar] Oleschuk, R. The separation of platinum and palladium by selective extraction of H 2 Pt(SCN) 6 and H 2 Pd(SCN) 4 using a polyTHF-impregnated filter. Talanta 1998, 45, 1235–1245.Web
اقرأ أكثرRecovery by hydrometallurgical extraction of the platinum-group …
In the typical PGMs recovery process, PGMs are extracted from scraps by smelting them with collector metals such as copper, or dissolving the scraps in strong …Web
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