Bipolar Cell, and Recovery of Rhenium * by Tsembel DARJAA1, Toru H. OKABE2 Yoshio WASEDA3 and Yoshiaki UMETSU4 1 Introduction In a previous paper, the present authors have demonstrated the effectiveness of leaching of molybdenum concentrate by electro-oxidation in alkaline and acidic NaCl solutions (Darjaa
A Pt-Re catalyst-based rhenium and platinum recovery solvolyticometallurgical technique has been developed by chlorinating with chlorine gas mixed with dimethylformamide and hydrochloric acid. The two-stage process conducted with burning residue after the first phase chlorination results in additional platinum transfer into the solution and makes it possible to obtain 70–94% …
Global "Recovery Rhenium Market" research report designed in a way that it can help to the businessman to acquire overall knowledge about the industry scenario and its most important factors. This report also provides accurate data which will help to developing and growing high in the industry. It is also including the study of historic and recent opportunities in the present Recovery ...
Fine particles, such as bleaching earth, metal particles and rust, can result in poor recovery of the trace elements present as nebulization and atomization problems affect the ICP-OES analysis. NOTE The only suitable non-ashing direct method for samples containing fine particles is graphite furnace atomic absorption spectrometry.
Recovery Rhenium market is segmented by region (country), players, by Type, and by Application. Players, stakeholders, and other participants in the global Recovery Rhenium market will be able to gain the upper hand as they use the report as a powerful resource. The segmental analysis focuses on revenue and forecast by region (country), by Type ...
Rhenium metal prices are currently around US$4,500-5,000 /kg. Consumption of rhenium in 2009 was estimated at 53,500kg, of which 78% was consumed in superalloys, 14% in catalysts and 8% in other end-uses including space, alloy mill products, petrochemicals and medical targets.
Rhenium is one of the rarest elements in Earth's continental crust; its estimated average crustal abundance is less than 1 part per billion. Rhenium is a metal that has an extremely high melting point and a heat-stable crystalline structure. More than 80 percent of the rhenium consumed in the world is used in high-temperature superalloys, especially those used to make turbine blades for jet ...
The registry of restriction intentions until outcome lists the intentions and Annex XV restriction proposals received by ECHA. A restriction proposal may be prepared by a Member State or by ECHA at the request of the Commission or on its own initiative for substances in the Authorisation List.
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Linee Guida da 1 a 10 - Dr. Giovanni Casetta LINEA EDUCAZIONALE A. Pagliarulo, G. Albo, A. Bertaccini, G. Breda A. Brizzi, P. Gontero, S. Cosciani Cunico G. De Rienzo, V. Serretta, A. Tubaro, G. Zeccolini Linee Guida A cura del Comitato SIU Linee Guida SIU Società Italiana di Urologia Largo Rodolfo Lanciani, 1 00198 Roma COMITATO ESECUTIVO Vincenzo Mirone, Presidente Marco …
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 containing these metals or from solutions containing the ions of these metals, is using appropriate ion exchange resins [1, 3, 5, 6,9]
The main goal of the research was to develop an effective method for recovery rhenium from pregnant solutions in in-situ uranium leaching. The objectives of the research were as follows: evaluation of the possibility of selective-and-advanced recovery of rhenium from ores by in-situ leaching method and comparison of the technological advantages ...
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RHENIUM RECOVERY FROM NON-TRADITIONAL RESOURCE: A.M. Chekmarev, I.D. Troshkina, D. Mendeleyev, University of Chemical Technology of Russia, Miusskaya Sq. 9, Moscow 125047, Russia About 50% world resource of rhenium is found in non-traditional carbon-based resource. The search of rhenium occurrence and the study of rhenium distribution in high ...
There is provided a hydrometallurgical process of recovering rhenium values from mixtures thereof with other metal values in which the rhenium values constitute a minority amount, for example super-alloys, which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably an aqueous mixture of hydrochloric acid and nitric acid, so as to form perrhenate species of at least ...
2001 Ph.D. in Mineralogy and Petrology, Università degli Studi di Firenze & Perugia. Employment following Ph.D.: (1) post-doctoral research position in mineralogical crystallography – University of Florence (2000-2004); (2) temporary Researcher in Mineralogy – University of Florence (2004-2006);
Rhenium is a chemical element with the symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table.With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.Rhenium has the third-highest melting point and highest boiling point of any stable element at 5869 K ...
A method of recovery and refining of rhenium after oxidizing alloy scrap is discussed in an article "Recovery And Refining Of Rhenium, Tungsten And Molybdenum From W—Re, Mo—Re And Other Alloy Scraps" by B. Heshmatpour et. al. J., The Less-Common Metals, 86, pages 121-128 (1982), which is incorporated herein for reference.
focus on the recovery of rhenium from secondary sources, such as alloy scraps and catalysts, is continually growing. This paper presents a review of both primary and secondary processing ...
Laurila JP, Castellone MD, Curcio A, Laatikainen LE, Haaparanta-Solin M, Gronroos TJ, Marjamaki P, Martikainen S, Santoro M, Laukkanen MO.. Extracellular superoxide dismutase is a growth regulatory mediator of tissue injury recovery.. Mol Ther. 2009; 17(3):448-54.
rhenium recovery from molybdenite. Sediment-hosted stratabound copper deposits in Kazakhstan (sandstone-type) and Poland (Kupferschiefer ["copper schist"] or reduced facies-type) supply most of the remaining rhenium produced by mining. Small amounts of rhenium are recovered by processing roll-front-type sandstone uranium ores in
Code 19 the reduction to waste and scrap, destruction, recovery of parts or components, Codice 19 riduzione in cascami e avanzi, ... rhenium, gallium, indium, vanadium and germanium waste and scrap ... Nessun risultato trovato per questo significato. Suggerisci un …
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A preliminary study on the hydrometallurgical recovery of rhenium from an engine-reverted superalloy, CMSX-4, was performed. The novelty of this work dealt with (i) the applicability of electro-generated Cl2 in rhenium leaching and (ii) the maneuvering of the organic extractants based on the metal speciation in leach liquor. In a two-step HCl leaching, more than 98% rhenium was …
Recovery of NH4ReO4 From MeOH-H2O Eluate. The rhenium in the MeOH-H2O eluate was also contaminated with NaCl because of poor separation of the NaCl wash from the initial eluate fraction. Since a high-purity rhenium product was …
Platinum / rhenium catalysts are widely used in the processing of hydrocarbon products. As rhenium values have increased, recovery techniques from spent catalysts have not kept pace. However, most users look to their refiners for increased recovery yields. Finally, there is a practical, cost-effective breakthrough that addresses this issue ...
On the contrary, rhenium is sensitive to the processing conditions during MoS 2 LSO because a plurality of factors (e.g. partial pressure of SO 2, presence and behavior of condensed metallic phases) establish equilibrium partial pressures of S 2 sufficient to favor the reduction of Re 2 O 7 to metallic rhenium and impede its recovery.
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