Production of rhenium-containing reforming catalysts
A rhenium-containing catalyst, particularly one comprising platinum and rhenium, composited with a porous inorganic support material, especially alumina, is found to be more selective in hydrocarbon conversion reactions, particularly reforming (hydroforming) when pretreated in a sequence which includes the steps of oxidation, dry hydrogen ...
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Rhenium – Discovery, Properties, Isotopes and Uses
Pointing the Chemical Properties of Rhenium. The electronic configuration is Xe X e 4f14 5d5 6s2. 75 is the atomic number of Rhenium. 3185°C, 5765°F and 3458 K is the Melting point. Atomic mass is 186.23 g.mol -1. The Relative atomic mass is 186.207. The Boiling point is 5590°C, 10094°F, and 5863 K.
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NMR Studies on the Dynamic Behaviour in Solution of Rhenium-Platinum …
NMR Studies on the Dynamic Behaviour in Solution of Rhenium-Platinum Mixed Metal Clusters Containing P-Donor Ligands ... Minoja, A.P., Mynott, R. (1995). NMR Studies on the Dynamic Behaviour in Solution of Rhenium-Platinum Mixed Metal Clusters Containing P-Donor Ligands. In: Farrugia, L.J. (eds) The Synergy Between Dynamics and Reactivity …
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recovery of platinum and rhenium
There are some methods for recovery of platinum, rhenium and other nobel metals from catalysts [1-10] .One effective method for recovery of Pt and Re from spent catalysts …
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Redox Properties of Binuclear Rhenium-Platinum Vinylidene …
DOI: 10.17516/1998-2836--13-19 Corpus ID: 100051584; Redox Properties of Binuclear Rhenium-Platinum Vinylidene Complexes with Phosphorus Containing Ligands @article{Burmakina2016RedoxPO, title={Redox Properties of Binuclear Rhenium-Platinum Vinylidene Complexes with Phosphorus Containing Ligands}, author={Galina V. …
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Rhenium
Rhenium. Rhenium (element #75, symbol Re) is a rare, silvery-white metallic element. Rhenium is found as a trace element in platinum ores and in the mineral columbite. It is very dense and has a melting temperature of 3186 degrees C (5767 degrees F). Rhenium does not form minerals of its own, but does occur as a trace element in the minerals ...
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Rhenium Data Sheet
Rhenium-containing products included ammonium perrhenate (APR), metal powder, and perrhenic acid. The major uses of rhenium were in superalloys used in high-temperature turbine engine components and in petroleum-reforming catalysts, representing an estimated 80% and 15%, respectively, of end uses. Bimetallic platinum-rhenium catalysts were used
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(PDF) Extractive Metallurgy of Rhenium: A Review
PDF | A variety of processing technologies exist for recovery from both primary and secondary sources of rhenium. Currently, there …
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Rhenium | Chemical Element, Alloying Agent | Britannica
Rhenium occurs up to about 20 parts per million in molybdenite and to a lesser extent in sulfidic copper ores. The recovery of rhenium is aided by the concentration of its volatile heptoxide (Re 2 O 7) in the flue dust and gases given off during the smelting of molybdenite ore or from its concentration with the platinum metals in the anode sludge …
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Synthesis and Reactivity of Organometallic Platinum …
Abstract— Since the discovery of a platinum compound containing the organic ethylene ligand by William Zeise in 1827, organic platinum compounds have attracted the attention of scientists all over the world. With the discovery of new properties of platinum compounds, the areas of their application have expanded: from catalysts of …
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Catalytic reforming with rhenium-platinum catalyst containing more
A new reforming process employs a new rhenium-platinum catalytic composite having a rhenium to platinum weight ratio in the range of not less than 2 to about 5, whereby longer relative cycle length is obtained when reforming a naphtha having less than about 0.5 ppm by weight of sulfur than if the rhenium-platinum ratio is outside of such range.
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Hich-octane gasoline production processes using catalysts containing
catalysts consist of platinum (usually 0.3-0.6 wt.%) Supported on γ -alumina, which is activated by HCl. or HF in order to increase its acidic activity (Cl or F content of 0.5-1%). In addition to ...
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Mineral Commodity Summaries 2022
The rhenium metal pellet price averaged $980 per kilogram in 2021, a 5% decrease from the annual average price in 2020. In 2021, apparent consumption in the United States decreased by 6% compared with that in 2020. During 2021, the United States continued to rely on imports for much of its supply of rhenium. Canada, Chile, Japan, and …
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Platinum-Containing New Generation Nickel-Based …
71. This paper presents the development of TROPEA alloy, a new platinum-containing nickel-based superalloy designed for single crystal applications. The target was to design an alloy competitive against commercial superalloys which combines high environmental resistance and mechanical strength at elevated temperatures.
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4 Types of Rhenium Alloys You Mightn't Know
2. Platinum-tungsten-rhenium Alloy. Platinum-tungsten-rhenium alloy is a platinum-based ternary alloy containing tungsten and rhenium. A small amount of rhenium can improve the resistivity and tensile strength, and reduce the temperature coefficient of resistance. Platinum-tungsten-rhenium alloy can be used as resistance strain material, …
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Rhenium – a valuable and rare element
We provice analytical services and competent advice on logistics and waste issues. Individual solutions rhenium metal management such as financing and leasing is part of our portfolio. Besides Rhenium, Heraeus offers ruthenium and platinum-containing compounds used in turbine blade production. Contact our rhenium experts for further …
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Review of Methods for Obtaining Rhenium from …
In the patent, rhenium was recovered from a solution of a spent catalyst containing rhenium and other platinum group metals, iron, and molybdenum in …
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US20170275733A1
a material containing both platinum and rhenium is a class of materials called superalloys. Creep-resistant rhenium-containing nickel and cobalt base superalloys were developed to provide high temperature performance in severe environments, such as those encountered in gas turbine engines and in blades for gas turbine generators.
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Rhenium: Unveiling the Intriguing Properties and Applications
Rhenium is a chemical element with the symbol Re and atomic number 75. It is a silvery-white, rare metal that belongs to the group of transition metals.Rhenium has a high melting point and is one of the densest elements known. It is primarily used as an alloying agent in the production of superalloys, which are used in high-temperature …
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Rhenium
The rhenium metal pellet price averaged $1,100 per kilogram in 2022, a 15% increase from the annual average price in 2021. Prepared by Désirée E. Polyak [(703) 648–4909, [email protected]] RHENIUM. In 2022, apparent consumption in the United States was 8% less than that in 2021. During 2022, the United States continued to rely on imports for ...
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Recovery of rhenium from aqueous mixed metal …
Selective precipitation recovery of rhenium from aqueous solutions containing a coexisting metal (molybdenum, tungsten, or aluminum) by means of …
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Anticancer and Antibiotic Rhenium Tri- and Dicarbonyl …
Bertrand introduced mixed metal complexes of platinum and rhenium bound to a modified bis[2-(hydroxyphenyl) ... (CO) 3] + N-heterocyclic carbene complexes containing unsubstituted benzimidazol-2-ylidene and phenanthroline, with MIC values against Gram-positive bacteria between 0.7–2 µg/mL . The mechanism of action of these …
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Reforming a sulfur-free naphtha with a platinum-rhenium …
Catalytic reforming with rhenium-platinum catalyst containing more rhenium than platinum US4369129A (en) * : : Exxon Research And Engineering Co. Production of rhenium-containing reforming catalysts US4416806A (en) * : : Elf France: Catalyst for production of aromatic hydrocarbons …
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Platinum-, rhenium-, indium-containing catalysts for …
Patent: Platinum-, rhenium-, indium-containing catalysts for conversion of hydrocarbons ...
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Rhenium
Rhenium. Rhenium (element #75, symbol Re) is a rare, silvery-white metallic element. Rhenium is found as a trace element in platinum ores and in the mineral columbite. It is very dense and has a melting …
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Rhenium
It is also one of the densest elements, following only platinum, iridium and osmium and it is one of the highest melting point elements exceeded only by tungsten and carbon. …
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Recovery of platinum and rhenium using selective
When an aqueous solution (pH 13.2) containing platinum(IV) (10.9 mM) and rhenium(VII) (11.5 mM) was irradiated with 60 mW cm⁻² light for 3 h, 95% of initial platinum content was recovered in ...
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Rhenium
Rhenium also is associated with copper minerals in sedimentary deposits in Armenia, Kazakhstan, Poland, Russia, and Uzbekistan, where ore is processed for copper recovery and the rhenium-bearing residues are recovered at copper smelters. Substitutes : Substitutes for rhenium in platinum-rhenium catalysts are being evaluated continually.
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Rhenium
Rhenium is a silvery-white metal. It has the third highest melting points of all elements. It is also the third densest element. Isotopes. Rhenium has one stable isotope which is rhenium-185. Rhenium that is found in nature is made up of 37.4% rhenium-185 and 62.6% rhenium-187. Rhenium has 33 known radioisotopes. They range from rhenium …
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Ruthenium compounds as anticancer agents
Future ruthenium drugs. In conclusion, ruthenium compounds have shown highly promising anticancer activity in cells, animals and humans. To date, two compounds are being evaluated in phase II clinical trials. However, a major limitation in ruthenium drug discovery is their unknown mode of action. This leads to three possible strategies for ...
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