platinum group iron

Disproportionation of Iron in Earth's Lower Mantle

The production of metallic Fe via the disproportionation of Fe2+ to Fe0 and Fe3+ in the deep Earth has been a long debated topic with important implications for the geochemistry of …

Frontiers | Enrichment of Platinum Group Elements in …

Platinum group elements (PGEs) occur mainly in basic–ultrabasic igneous rocks and are concentrated by the differentiation and crystallization of magma. Thin polymetallic layers including Ni, Mo, V, PGEs, and rare-earth elements are widely developed in lower Cambrian black shales in southern China. The PGE contents in such layers may …

A new approach to recover platinum-group metals from

Request PDF | A new approach to recover platinum-group metals from spent catalytic converters via iron matte | Decreasing stocks of natural resources and continuously increasing demand for ...

Geochemical characteristics of platinum-group elements in …

Polymetallic nodules and cobalt (Co)-rich crusts are enriched in platinum-group elements (PGEs), especially platinum (Pt) and may be important sinks of PGEs. At present, little information is available on PGEs in polymetallic nodules, and their geochemical characteristics and the causes of PGEs enrichment are unclear. Here, …

PHYSICAL AND CHEMICAL PROPERTIES OF PLATINUM …

Chloride solutions are the predominant media for the commercial separation and refi ning of PGMs. In this application, PGMs form sequences of aquated species with the relatively weakly bound chlorides. such as the hexagonal [M(Cl) (H 2O) 6-n)]4-n, where M is Pt(IV) or. n Ir(IV), or the square planar [M (Cl.

Platinum-Group Element

Platinum-group element concentrates are made into a matte that is relatively low in iron and sulfur, and enriched in platinum-group elements by smelting and converting. Smelting removes most gangue minerals as molten slag. Converting removes most iron and sulfur by oxidation with air and oxygen. In combination, these two steps upgrade the feed ...

Platinum group | Chemical Properties, Uses

Platinum group, six metals, in order of increasing atomic weight, ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), and platinum (Pt). The elements all possess a silvery white colour—except osmium, …

(PDF) Extraction of Platinum Group Metals

Ionic liquids (ILs) with amino moieties were designed and synthesized as extractants for the selective extraction of platinum group metal (PGM) ions into IL phases from mixed aqueous HCl solutions ...

Platinum Group Elements in Ferromanganese Crusts …

The average platinum content in ferromanganese crusts of the Atlantic Ocean according to data [ 14, 30, 33, 36] ( N = 22) is about 200 ng/g, which allows them to be …

Platinum Group Elements in Ferromanganese Crusts of …

Abstract The behavior of platinum group elements (PGE = Pt, Pd, Ru, Ir) in separate layers of ferromanganese crusts of the Atlantic Ocean is considered. The studied crusts, in addition to the hydrogenous source of the matter (crusts from the Bathymetrists Seamounts), formed under the variable influence of hydrothermal (MAR, station 2176) …

Platinum Group Metal

The platinum group metals (PGMs) comprise 6 elements, which are platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have high melting points, high heat resistance, high corrosion resistances, and unique catalytic properties. Owing to these properties, PGMs are being used widely in many industrial fields, most notably as ...

Precious and structural metals on asteroids

Platinum group metals remain the only likely prospect for elements returned to Earth from asteroids because of their high value, high grades in asteroid materials, and low amounts mined per year on Earth. ... Chemical study of group IIIF iron meteorites and the potentially related pallasites Zinder and Northwest Africa 1911. Geochem. Cosmochim …

Platinum Group Metal

The platinum group metals occupy the second and third rows of periodic table Group VIII, the first row of which consists of iron (Fe), cobalt (Co), and nickel (Ni). The second-row …

List of Platinum Group Metals or PGMs

The six PGMs share similar properties, including: 1. Extremely high density (densest elementis a PGM) 2. Highly resistant to wear or … See more

Platinum and nickel markets to see surpluses in 2022, …

"Next year, platinum demand is expected to stay relatively flat as the falling share of diesel cars in Europe offsets gains in other applications. At the same time, the metal production will continue growing, keeping the market in a 1 Moz surplus, excluding investments," Nornickel said.

The Seven Rarest Metals | Geology for Investors

Platinum Group Metals. Osmium, iridium, palladium, ruthenium and rhodium are typically grouped with platinum and known as platinum-group metals or elements (PGMs or PGEs). These elements are rare on earth, but abundant in the rest of the universe. PGMs are all chemically similar to each other and can substitute for each other …

Metals smelting-collection method for recycling …

Platinum group metals (PGM) are widely used in catalytic industry due to their outstanding physical and chemical properties (high-temperature stability, high catalyst activity, high heat ...

Precise stepwise recovery of platinum group metals …

Accurate separation and efficient recovery of platinum group metals (PGMs, mainly Ru, Rh and Pd) from high level liquid waste (HLLW) is a good choice for clean …

Platinum group

Platinum group - Alloys, Properties, Uses: The mechanical properties of the six platinum metals differ greatly. Platinum and palladium are rather soft and very ductile; these metals and most of their alloys can be worked hot or cold. Rhodium is initially worked hot, but cold-working can be done later with rather frequent annealing. Iridium can be worked hot, as …

Metals | Free Full-Text | Refining Approaches in the Platinum Group

Mineable platinum group metal (PGM) deposits are rare and found in relatively few areas of the world. At the same time, the use of PGM is predicted to expand in green technology and energy applications, and PGMs are consequently currently listed as European Union critical metals. Increased mineralogical complexity, lower grade ores, …

A new approach to recover platinum-group metals from …

Three iron sources, which can be easily obtained from the market, were used to compare the PGM recovery performance in this experimental study. For this aim, metallic iron (Fe°), iron(III) oxide (Fe 2 O 3), and iron-sulfur (FeS 2) (i.e., pyrite) were used. The obtained results are summarized in Fig. 9.

Weak affinity for CO of platinum group metal nanoparticles …

The metal–support interaction in the partially reduced Pt/α-Fe2O3, Ir/γ-Fe2O3, Rh/γ-Fe2O3, and Ru/γ-Fe2O3 catalysts was investigated by IR-CO probe and X-ray photoelectron spectroscopy (XPS). The vibration bands of CO adsorbed on these noble metal particles could not be observed after these catalysts were treated with H2 at 373 K. …

Platinum group element-based nanozymes for biomedical

In recent years, platinum group element (PGE)-based (Pt, Pd, Ru, Rh, Ir, and Os) nanozymes developed successively, have not only promoted the research of nanozymes but also expanded the biomedical applications of nanomaterials. Generally speaking, PGE-based nanozymes process high catalytic efficiency, specific surface area, …

Metals smelting-collection method for recycling of platinum group …

Platinum group metals (PGMs) are widely applied in the field of catalysts due to their excellent catalyst activity and high-temperature stability. ... (2014) also studied the recovery of platinum from the waste catalyst using iron trapping based on solid state. In this process, when the reducing temperature was only 1220°C, PGMs converted into ...

Recovery of platinum-group metals from spent catalysts by microwave

The feasibility of a facile route to recover platinum-group metals (PGMs) ... Ding et al. proposed a method which collected PGMs by iron during smelting using Na 2 B 4 O 7, CaO, Na 2 O and CaF 2 as fluxes in the temperature range 1300–1400 °C (Ding et al., 2020). It was found that high percentages of PGMs could be recovered under the optimal ...

Iridium Alloys

Pure platinum is a little harder (4–4.5) on the Mohs scale of hardness than pure iron (4). Platinum is one of the rarest elements in the Earth's crust ... Ruthenium is a rare transition metal of the platinum group with chemical symbol (Ru) and atomic number 44 in the Periodic Table. Prof. Jᶒdrzej Śniadecki, a Polish chemist, isolated the ...

Mineral

Mineral - Classification, Properties, Types: Since the middle of the 19th century, minerals have been classified on the basis of their chemical composition. Under this scheme, they are divided into classes according to their dominant anion or anionic group (e.g., halides, oxides, and sulfides). Several reasons justify use of this criterion as the distinguishing …

Platinum Group Announces Sale of Tiger Oak Media

Print magazine publisher's assets sold to four different buyers Platinum Group, a business advisory firm based in Minnetonka, Minn., today announced it completed leading the sale of the assets of Tiger Oak Media Inc., a Minneapolis-based publisher of print magazines, on behalf of the U.S. Bankruptcy Court for the District of Minnesota. …

Recovery of Platinum Group Metals from Spent Catalysts Using Iron

The recovery of platinum group metals (PGMs) from spent automobile catalysts is a difficult process because of their relatively low contents in the scrap. In this study, to improve the efficiency of the existing recycling techniques, a novel physical concentration method involving treatment with FeCl2 vapor has been examined. The …

Bioprocessing of oxidized platinum group element (PGE) …

Platinum-group elements (PGE) are relevant for many high technology applications, prompting the search for potential alternative resources and environmentally friendly processing technologies. ... Ferrous and ferric iron concentrations were measured in 0.45 μm-filtered samples using the Ferrozine assay (Lovley and Phillips, 1987). Dissolved ...