In the present review, all major PGM recovery techniques are presented and discussed. Hydrometallurgical processes could gain a foothold in industrial scale recycling, by adopting a direct ...Web

Platinum Group Metals (PGMs) play a significant role in the manufacturing of catalysts, super alloys, electronics, space materials, biomedical equipments, jewellery, etc. due to their excellent electrical and thermal conductivity as well as chemical resistivity. The rising demand of PGMs in industrial applications and their limited natural resources have …Web

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

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

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

Recovery by hydrometallurgical extraction of the platinum-group metals from car catalytic converters. May 2011; Minerals Engineering 24(6) ... As hydrometallurgical solvent extraction (SX) methods ...Web

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

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

Aberasturi DJ, Pinedo R, Larramendi IR, Larramendi JI, Rojo T (2011) Recovery by hydrometallurgical extraction of the platinum-group metals from car catalytic converters. Miner Eng 24(6):505–513. Article Google Scholar Chen J, Huang K (2006) A new technique for extraction of platinum group metals by pressure cyanidation.Web

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

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

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

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

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

Extraction and separation of platinum group metals (PGMs) from secondary raw materials are usually carried out via hydrometallurgical …Web

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

The continuous extraction and separation of Platinum Group Metals (PGMs) to obtain high purity single PGM product has always been a challenging task. The difficulty is the palladium/platinum separation. ... The methods based on liquid–liquid extraction are of major importance for hydrometallurgical processes, including refining …Web

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

Platinum Lake Technology Inc., Canada has successfully developed a hydrometallurgical process for the recovery PGMs (95% Pt and 98% Pd) from spent …Web

Hydrometallurgical processes have been proposed as an alternative to pyrometallurgical ones, with leaching and separation by solvent extraction being core …Web

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

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

More recently, its use in removing trace metallic impurities from hydrometallurgical process streams (with typical background metal concentrations of 50–100 g/L) has increased substantially.Web

The general methods of extracting and separating platinum from spent catalysts include pyrometallurgy and hydrometallurgy.Web

Recovery of PGMs (especially rhodium, platinum, and palladium) from different spent manufactured products (like catalytic converters) is considered as an important task as they are rarely found in nature, and they possess high economic value. In this work, the honeycomb of a car catalytic converter was primarily processed by crushing, grinding, …Web

The common extraction process refers to pyrometallurgy combined with hydrometallurgy, where platinum group metal ores (e.g. Merensky Reef ore grades …Web

This review aims to highlight and discuss some of the most relevant key-achievements, developed at laboratory scale, focusing on the use of ILs for the hydrometallurgical extraction of critical metals from urban mines, particularly the platinum-group metals (PGMs): ruthenium, rhodium, palladium, osmium, iridium, and …Web

Zhang B, Shi P, Jiang M (2016) Advances towards a Clean hydrometallurgical process for chromite. Minerals 6:1–7. ... Charlesworth P (1981) Separating the platinum group metals by liquid-liquid extraction. Platinum Met Rev 25(3):106–112. MathSciNet Google Scholar Bateman (2005) Extracting PGMs from …Web

Most research on the use of ionic liquids for the liquid extraction of platinum group metals focuses on the use of their dilute organic solutions, in which the role of the …Web

Ramachandra used LIX 841 and Alamine 336 to extract platinum and palladium (A/O = 3), and then platinum and palladium were stripped with 0.5 mol/L thioureas and 0.1 mol/L hydrochloric acids, respectively. ... Ruiz de Larramendi, J.I.; Rojo, T. Recovery by hydrometallurgical extraction of the platinum-group metals from car …Web

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