Platinum-, rhenium-, indium-containing catalysts for …
Patent: Platinum-, rhenium-, indium-containing catalysts for conversion of hydrocarbons ...
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 the precipitate in its zerovalent state with high …
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 …
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.
(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 …
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.
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.
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 …
Recovery of platinum and rhenium using selective
The presence of platinum-containing precipitate in the reaction system may affect the growth of the rhenium-containing particles. The total mass balance for the two-stage treatment was calculated according to Eqs. (4), (5) for platinum and rhenium, respectively, where n Pt is Pt molar amount and n Re is Re molar amount.
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 …
Reforming with a platinum-rhenium catalyst
The process comprises the reforming of naphtha fractions to produce high octane gasoline using a catalyst containing platinum and rhenium in association with a porous solid carrier, preferably alumina. The catalyst composition is disclosed as comprising from 0.01 to 3.0 weight percent platinum and 0.01 to 5.0 weight percent rhenium. The ...
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. …
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 …
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 …
Anticancer and Antibiotic Rhenium Tri- and Dicarbonyl …
Heterobimetallic platinum-rhenium species recently reported are of two types: either incorporating Pt(II) coordination complexes [41,42,43] or redox-active Pt(IV) ... (CO) 3] + N-heterocyclic carbene complexes containing unsubstituted benzimidazol-2-ylidene and phenanthroline, with MIC values against Gram-positive bacteria between …
Role of sulfur in a skewed reforming catalyst with a low platinum …
The skewed catalyst containing more rhenium than platinum is thought to have a higher hydrogenolysis activity because of its higher Re' concentration [ 10 ] . After presulfidation, the sulfur was preferentially located on rhenium atoms because of the well-known differences in the electronic affinity of platinum, rhenium and sulfur as has ...
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 …
The Oxidation State of Rhenium and Its Role in …
The Oxidation State of Rhenium and Its Role in Platinum-Rhenium Reforming Catalysts | Johnson Matthey Technology Review. Home. A-Z Publications. Platinum Metals …
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 …
Discovery, properties and applications of rhenium …
Trirhenium nonachloride (aka rhenium trichloride), Re 3 Cl 9, is a dark-red hygroscopic solid that is insoluble in ordinary solvents. Re 3 Cl 9 can be prepared by …
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 …
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 …
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 …
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 ...
Assessment of supply interruption of rhenium, recycling, processing
The platinum and rhenium can then be selectively leached in concentrated (5 mol/L) sulphuric acid solutions containing sodium chloride and a potassium persulfate oxidant (K 2 S 2 O 8) [32]. By using this approach, it was reported that the recovery levels of rhenium and platinum are as high as 95.5% and 97%, respectively [ 32 ].
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 …
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. …
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 ...
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.
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.
