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01/02/2009 To choose the best medium for zirconium and hafnium separation by continuous ion exchange, ... Amer S.Solvent extraction applications in hydrometallurgy — 4: titanium, zirconium and hafnium. Revista de Metalurgia (Madrid), 17 (6) (1981), pp. 377-395. Google Scholar. Begovich and Sisson, 1983. Begovich J.M., Sisson W.G.Continuous ion exchange separation of zirconium and hafnium
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15/01/2020 The concentrations of zirconium and hafnium were determined by energy dispersive X-ray fluorescence spectrometry - EDXRF (Shimadzu - EDX 720), whereas the concentration of the nitrate was determined by molecular absorption spectrophotometry in the ultraviolet region (302 nm) through a UV–visible spectrophotometer (Varian - Cary 50 conc); the acidity was determined through the
01/12/2014 1. Introduction. Zirconium is always accompanied by hafnium in nature and therefore termed congeneric. Zircon (ZrSiO 4) and baddeleyite (ZrO 2) are the major minerals for zirconium and contained more than 0.5% hafnium, which originates from the substitution of zirconium in the crystal lattice (Taghizadeh et al., 2011).Zirconium has low average neutron capture cross-section, while hafnium
Zirconium is a chemical element with the symbol Zr and atomic number 40. The name zirconium is taken from the name of the mineral zircon (the word is related to Persian zargun (zircon; zar-gun, "gold-like" or "as gold")), the most important source of zirconium. It is a lustrous, grey-white, strong transition metal that closely resembles hafnium and, to a lesser extent, titanium. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Z
The present invention relates to the field of hydrometallurgy of zirconium and hafnium and can be used to obtain pure compounds of zirconium and hafnium extraction method. Separation of zirconium and hafnium from nitrate solutions carry out the extraction method: first, both components are removed from solution by tributyl phosphate (TBP), and then extravert. There is a method of separation in ...
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01/10/2016 1. Introduction. Zirconium is mainly used for cladding nuclear reactor fuels due to its low neutron capture cross section and strong resistance to corrosion, whereas neutron absorption cross section of hafnium is 640 times higher than that of zirconium (Banda et al., 2013a).Zirconium and hafnium are normally associated together in nature (Hf / (Zr + Hf) is about 1–3%) and it is difficult for ...
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The influence of the treatment of Zr(IV) and Hf(IV) sulfate solution on the ion-exchange purifying of zirconium from hafnium on Diphonix® resin. Hydrometallurgy 2013, 140, 77-81. DOI: 10.1016/j.hydromet.2013.09.006. Ling Yun Wang, Hwa Young Lee, Man Seung Lee. Solvent Extraction of Zirconium and Hafnium from Hydrochloric Acid Solutions Using Acidic Organophosphorus
The received zirconium extract contains <0.01% (mass.) of hafnium. Possibility of HNO3 recirculation in cells of a counter-current cascade is examined. It is shown that at the washing stage it is possible to use the HNO3 solution with concentration of 0.1–0.5 mole/dm3 instead of 3–4 mole/dm3. The proposed process was tested on centrifugal exPulverizers. It was shown that the system output in ...
Zirconium Hafnium Hydrometallurgy Hafnium Halite Local Hafnium Spare parts It was observed that separation of zirconium and hafnium is favored by high . Get Price. ZincWikipedia. Characteristics Physical properties. Zinc is a bluish-white lustrous diamagnetic metal though most common commercial grades of the metal have a dull finish. It is . Hafnium - Wikipedia ...
The optimum conditions for hafnium and zirconium separation was that the aqueous acidity is 1.0 mol/L, the concentration of P204 in the organic phase is 10% (v/v), the contacting time is 15 min ...
The present invention relates to the field of hydrometallurgy of zirconium and hafnium and can be used to obtain pure compounds of zirconium and hafnium extraction method. There are various methods of extraction of zirconium and hafnium from nitric acid solutions using tributyl phosphate (TBP) with a concentration of 50-70% by volume in various hydrocarbon solvents and their separation; and ...
Solid/Liquid Extraction of Zirconium and Hafnium in Hydrochloric Acid Aqueous Solution with Anion Exchange ResinKinetic Study and Equilibrium Analyses. Industrial Engineering Chemistry Research 2007 , 46 (4) , 1286-1291.
OSTI.GOV Journal Article: Extractive metallurgy of zirconium - a review of progress in India. Extractive metallurgy of zirconium - a review of progress in India. Full Record; Other Related Research; Authors: Subramanyam, R B; Saratchandran, N; Sundaram, C V Publication Date: Sat Dec 01 00:00:00 EST 1973 Research Org.: Nuclear Fuel Complex, Hyderabad (India) OSTI Identifier: ...
The optimum zirconium/hafnium separation was achieved using an acidity of 7.0 mol?L?1, nitrate concentration of 9.2 mol?L?1 and 1.5 mol?L?1 of TBP. In these conditions, a separation factor of 12.6 was obtained. This paper describes the study of the extraction of Zr and Hf in nitric and hydrochloric media by solvent extraction technique using different types of extractants. The effect of the ...
The received zirconium extract contains <0.01% (mass.) of hafnium. Possibility of HNO3 recirculation in cells of a counter-current cascade is examined. It is shown that at the washing stage it is possible to use the HNO3 solution with concentration of 0.1–0.5 mole/dm3 instead of 3–4 mole/dm3. The proposed process was tested on centrifugal exPulverizers. It was shown that the system output in ...
thorium, niobium, tantalum, zirconium, hafnium, boron, beryllium, and molybde- num. The second step took place in the 1960s when solvent extraction was applied for the first time to extract a rela- tively cheap metal — copper. At present, solvent extraction technology is wide-
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Zirconium Hafnium Separation Ion exchange Eudialyte ABSTRACT Apart from zircon and baddeleyite, some other minerals also contain amounts of Zr and Hf, and H 2SO 4 can be the best candidate leachate for their recovery. The subsequent step in the process would be the recovery and se-paration of Hf and Zr from the resulting leach solution together with impurities. This reported study focused on ...
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Zirconium is an ideal material for nuclear reactors due to its low absorption cross-section for thermal neutrons, whereas the typically contained hafnium with strong neutron-absorption is very...
The influence of the treatment of Zr(IV) and Hf(IV) sulfate solution on the ion-exchange purifying of zirconium from hafnium on Diphonix® resin. Hydrometallurgy 2013, 140, 77-81. DOI: 10.1016/j.hydromet.2013.09.006. Ling Yun Wang, Hwa Young Lee, Man Seung Lee. Solvent Extraction of Zirconium and Hafnium from Hydrochloric Acid Solutions Using Acidic Organophosphorus
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Solid/Liquid Extraction of Zirconium and Hafnium in Hydrochloric Acid Aqueous Solution with Anion Exchange ResinKinetic Study and Equilibrium Analyses. Industrial Engineering Chemistry Research 2007 , 46 (4) , 1286-1291.
Page created by Kevin Bush: Separation of Zirconium and Hafnium by Extraction with 2-Octanol
Separation of zirconium and hafnium from nitric acid solutions with LIX 63, PC 88A and their mixture by solvent extraction. Hydrometallurgy 2014, 150, 153-160. DOI: 10.1016/j.hydromet.2014.10.009. Thi Kim Nga Luong, Gregory Absillis, Pavletta Shestakova, Tatjana N. Parac-Vogt. Solution Speciation of the Dinuclear Zr IV -Substituted Keggin Polyoxometalate [{α-PW 11 O 39 Zr(μ-OH)(H 2 O)} 2 ] 8 ...
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OSTI.GOV Journal Article: Extractive metallurgy of zirconium - a review of progress in India. Extractive metallurgy of zirconium - a review of progress in India. Full Record; Other Related Research; Authors: Subramanyam, R B; Saratchandran, N; Sundaram, C V Publication Date: Sat Dec 01 00:00:00 EST 1973 Research Org.: Nuclear Fuel Complex, Hyderabad (India) OSTI Identifier: ...
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The received zirconium extract contains <0.01% (mass.) of hafnium. Possibility of HNO3 recirculation in cells of a counter-current cascade is examined. It is shown that at the washing stage it is possible to use the HNO3 solution with concentration of 0.1–0.5 mole/dm3 instead of 3–4 mole/dm3. The proposed process was tested on centrifugal exPulverizers. It was shown that the system output in ...
Ling Yun Wang, Man Seung Lee, Separation of zirconium and hafnium from nitric acid solutions with LIX 63, PC 88A and their mixture by solvent extraction, Hydrometallurgy, Vol. 150, 2014 G.M. Marshall, B. Patarachao, K. Moran, P.H.J. Mercier, Zircon mineral solids concentrated from Athabasca oil sands froth treatment tailings: Surface chemistry and flotation properties , Minerals Engineering ...
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Zirconium Hafnium Separation Ion exchange Eudialyte ABSTRACT Apart from zircon and baddeleyite, some other minerals also contain amounts of Zr and Hf, and H 2SO 4 can be the best candidate leachate for their recovery. The subsequent step in the process would be the recovery and se-paration of Hf and Zr from the resulting leach solution together with impurities. This reported study focused on ...
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Extraction kinetics of zirconium and hafnium in DIBK-P204 system. Nonferrous Metals (Extractive Metallurgy). 2013. No. 3. pp. 28-31. 5. Jakóbik-Kolon A., Smolik M., Jaroszek H. The influence of the treatment of Zr(IV) and Hf(IV) sulfate solution on the ion-exchange purifying of zirconium from hafnium on Diphonix ® resin. Hydrometallurgy. 2013 ...
Separation of zirconium and hafnium from nitric acid solutions with LIX 63, PC 88A and their mixture by solvent extraction. Hydrometallurgy 2014, 150, 153-160. DOI: 10.1016/j.hydromet.2014.10.009. Thi Kim Nga Luong, Gregory Absillis, Pavletta Shestakova, Tatjana N. Parac-Vogt.
thorium, niobium, tantalum, zirconium, hafnium, boron, beryllium, and molybde- num. The second step took place in the 1960s when solvent extraction was applied for the first time to extract a rela- tively cheap metal — copper. At present, solvent extraction technology is wide-
Ling Yun Wang, Man Seung Lee, Separation of zirconium and hafnium from nitric acid solutions with LIX 63, PC 88A and their mixture by solvent extraction, Hydrometallurgy, Vol. 150, 2014 G.M. Marshall, B. Patarachao, K. Moran, P.H.J. Mercier, Zircon mineral solids concentrated from Athabasca oil sands froth treatment tailings: Surface chemistry and flotation properties , Minerals Engineering ...
Page created by Kevin Bush: Separation of Zirconium and Hafnium by Extraction with 2-Octanol
Ind. Eng. Chem. All Publications/Website. OR SEARCH CITATIONS
Zirconium and hafmum which occur together, are chemically similar.
Mechanistic study of hafnium and zirconium extraction with organophosphorus extractants. Published on Feb 23, 2018 in Solvent Extraction and Ion Exchange 1.831 DOI : 10.1080/07366299.2018.1431078 Copy DOI. V. Vermaak 1. Estimated H-index: 1 (NWU: North-West University), Henning M. Krieg 16. Estimated H-index: 16 (NWU: North-West University) + 1 Authors D.J. van der Westhuizen ...
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Ling Yun Wang, Man Seung Lee, Separation of zirconium and hafnium from nitric acid solutions with LIX 63, PC 88A and their mixture by solvent extraction, Hydrometallurgy, Vol. 150, 2014 M. Aliakbari, K. Saberyan, M. Noaparast, H. Abdollahi, A. Akcil, Separation of hafnium and zirconium using TBP modified ferromagnetic nanoparticles: Effects of acid and metals concentrations , Hydrometallurgy ...
The received zirconium extract contains <0.01% (mass.) of hafnium. Possibility of HNO 3 recirculation in cells of a counter-current cascade is examined. It is shown that at the washing stage it is possible to use the HNO3 solution with concentration of 0.1–0.5 mole/dm 3 instead of 3–4 mole/dm 3.
Based on the selectivity of zirconium over hafnium in the organic phase, a McCabe-Thiele diagram was constructed. A near complete stripping of zirconium from the organic phase was achieved using a 3 M sulphuric acid solution. Additional studies are required in order to determine the reaction mechanism and the chemical speciation of the current investigation. ...
[1] Setyawan, W., 2015, Pengembangan teknologi pengolahan pasir zirkon lokal Indonesia menjadi produk zirkonium grade industri dan nuklir untuk mendukung MP3EI, Laporan akhir Program Insinas Riset SiNas, PSTA-Batan, Yogyakarta. [2] Wang, L.Y., and Lee. M.S., 2014, Separation of zirconium and hafnium from nitric acid solutions with LIX 63, PC 88A and their mixture by solvent extraction ...
The Hydrometallurgy section of the MetSoc of CIM is inviting delegates to attend the annual section luncheon where Dr. Fathi Habashi of Universite Laval has been invited to speak on Hydrometallurgy in the past decades - a personal view. The section activities and awards
