2 edition of Purification of Zirconium by Electrotransport. found in the catalog.
Purification of Zirconium by Electrotransport.
Atomic Energy of Canada Limited.
|Series||Atomic Energy of Canada Limited. AECL -- 8051|
|Contributions||Zee, R., Watters, J.|
A method is proposed for the determination of the equilibrium constantsk and k′ for the reactions Zr + 2I2 — ZrI4=0 and 2I-I2 = 0, which is based on the measurement of the amount of iodine or zirconium liberated in the decomposition of zirconium tetraiodide on a heated surface In the process of establishing decomposition of the tetraiodide was carried out at – °C. Electrotransport is used to minimize reagent consumption and, consequently, waste volume. In particular, electrotransport to solid cathodes is used for recovery of an essentially pure uranium product in the presence of other actinides; removal of pure uranium is used to adjust the electrolyte more» composition in preparation for recovery of a.
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Try the new Google Books. Check out the new look and enjoy easier access to your favorite features. Try it now. The Purification of Hydrofluoric Acid. Section 8. Bibliography. The Fluorides of Zirconium and Hafnium Section 7. Bibliography. FLUORIDES OF THE ELEMENTS OF GROUP. JACerS is a leading source for top-quality basic science research and modeling spanning the diverse field of ceramic and glass materials science.
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K - ion pump. Vol. 18, No. 5 PURIFICATION OF Zr BY ELECTROTRANSPORT FIG.2 Zirconium sample, adaptors and electrode assembly used in the electrotransport purification experiments. The base pressure in the ion pumped system was 1 to 7 x Pa after degassing and cooling the system from by: 6.
In conjunction with this investigation the specific resistivity and solid solubility of carbon in β zirconium were also determined as a function of temperature. Attempts to prepare zirconium metal with a low carbon content by the van Arkel process for use in subsequent electrotransport purification experiments are described.
The separation processes are roughly classified into hydro- and pyrometallurgical routes. The current dominant zirconium production route involves pyrometallurgical ore cracking, multi-step hydrometallurgical liquid-liquid extraction for hafnium removal and the reduction of zirconium tetrachloride to the pure metal by the Kroll by: 4.
Zirconium and tantalum were purified by SSE at and respectively. But for zirconium this procedure did not appear to be sufficiently effective. Thus, tantalum adapters were used to obtain yttrium of maximum purity (Fig l(b)). Fig. 2 illustrates a typical distribution of the resistance ratio along the specimen after each SSE by: 5.
Chronic particulate or fume exposure typically occurs in industries involving the mining, cutting, and purification of zirconium‐containing materials. Occupational exposure to zirconium compounds is most likely in foundry workers, ceramic workers, and : Kambria K. Haire, Jayme P. Coyle, Raymond D.
Harbison. Solid state electrotransport has been used as the final stage in the purification of erbium, which is one of the highest vapour pressure rare earth metals to which this technique has been applied.
G Hunter, J Dickinson, B Herb, R Graham, Creation of Oxidized Zirconium Orthopaedic Implants, Journal of ASTM International, /JAI, 2, 7, (), (). Crossref Review of Extraction, Processing, Properties & Applications of Reactive Metals.
Diffusion and electrotransport parameters of the transition elements molybdenum, rhenium, tungsten and zirconium in β thorium were measured, for the temperature range – K. For each solute element, except zirconium, the measurement was made at four different temperatures, where as for zirconium, studies were performed for only two.
Yttrium purification The earliest reported application of electrotransport to the purification of a metal was that of Williams and Huffine  on yttrium in The metal used in this study was of rather low purity, containing wt.
ppm oxygen, ppm nitrogen, 97 ppm hydrogen, 55 ppm silicon, ppm iron and ppm nickel. Separation of zirconium from hafnium in nitric acid solutions by solvent extraction using dibutyl butylphosphonate.
Part 2. Mixer- settler runs. Hydrometallurgy, 3: A process for zirconium/hafnium separation based on the distribution data given in Part 1 (Brown and Healy, ) has been successfully tested in a stage Croda mixer. The purification of zirconium in a cyclical static process using ZrI/sub 4/ as the volatile compound and W filaments was studied after a review of previous works on the subject.
The equations corresponding to the isothermal process are given, in some detail. The optimum conditions of temperature and velocity for the maximum purification of the. Abstract. A method is proposed for the determination of the equilibrium constants k and k' for the reactions Zr+2I 2 −ZrI 4 =0 and 2I−I 2 =0, which is based on the measurement of the amount of iodine or zirconium liberated in the decomposition of zirconium tetraiodide on a heated surface in the process of establishing equilibrium.
The decomposition of the tetraiodide was carried out at The growth and development witnessed today in modern science, engineering, and technology owes a heavy debt to the rare, refractory, and reactive metals group, of which niobium is a member.
Extractive Metallurgy of Niobium presents a vivid account of the metal through its comprehensive discussions of properties and applications, resources and resource processing, chemical processing and.
Authors: Abate, L J; Wilhelm, H A Publication Date: Thu Mar 01 EST Research Org.: Ames Lab. OSTI Identifier: Report Number(s): ISC NSA Number. Purification of zirconium by electrotransport processing.
Article. Jan ; Scripta Metall; The book covers the general principles of solution chemistry, engineering aspects, and detailed. Additional Physical Format: Online version: Nielsen, R.H. Zirconium purification (OCoLC) Material Type: Government publication, National government publication. Purification of Bis(cyclopentadienyl)zirconium dihydride (Cp2ZrH2) Hi all Anyone have any experience purifying Bis(cyclopentadienyl)zirconium dihydride (Cp2ZrH2).
Not to be confused with Bis(cyclopentadienyl)zirconium chloride hydride (Cp2ZrHCl) (aka Schwartz's reagent). High‐purity zirconium tetrafluoride (ZrF 4) has been produced using sublimation and distillation transition‐metal impurities have been determined in these purified samples, and it has been found that distillation is the preferred method of purification using a number of criteria.
The differential equation governing the electrotransport of solutes in metals under a contaminating environment is solved analytically using a Laplace transformation. The closed form solution includes an infinite series which vanishes at long times.
This solution is applied in zirconium and the results indicate that for oxygen an equivalent partial pressure of 10 − 7 Pa is necessary to. I Fundamentals and the Present Status of Purification of Metals.- 1 The Thermodynamics of Oxygen in Reactive Metals.- Introduction.- Various Techniques for Removing Oxygen from Reactive Metals.- Solid State Electrotransport.- Deoxidation Using Metal/Metal Oxide Equilibrium.- Calcium Halide Flux Deoxidation.- Electrochemical Deoxidation.- Deoxidation by.
Electronic book Electronic books: Additional Physical Format: Print version: Gupta, C. K. Extractive metallurgy of niobium. Boca Raton: CRC Press, © (DLC) (OCoLC) Material Type: Document, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: C K Gupta; A K Suri.Abstract.
This patent describes an improvement in a process for zirconium-hafnium separation. It utilizes an extractive distillation column with a mixture of zirconium and hafnium tetrachlorides introduced into a distillation column having a top and bottom with hafnium enriched overheads taken from the top of the column and a molten salt solvent circulated through the column to provide a.
Two electrochemical methods of removing zirconium from the electrorefiner have been evaluated. The first is a three-step method consisting of chemical oxidation of zirconium by CdCl 2 addition, depletion of zirconium from the cadmium pool by electrotransport, and drawdown of zirconium from the LiCl-KCl eutectic salt by using a different.