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Highly efficient separation and enrichment of hafnium
网页2023年2月15日As an advanced membrane separation method, the application of IIMs in Hf–Zr separation and Hf enrichment may effectively improve the shortcomings of low hafnium resource recovery and poor selectivity of traditional membrane separation
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Highly efficient separation and enrichment of hafnium
网页2023年2月13日Hafnium (Hf) has no independent ore in nature; it is always closely symbiotic with zirconium (Zr) in a homogeneous form, and accounts for only
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Separation of Zirconium and Hafnium: A
网页2014年1月1日The separation processes are roughly classified into hydro- and pyrometallurgical routes. The current dominant zirconium production
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Separation of Hafnium and Zirconium from Ti- and Fe
网页1999年4月1日This stone presents a new chemical separation method for Hf and Zr from rocks using extraction chromatographic resins prepared from inert polymeric supports
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Separation of Zirconium and Hafnium: A Review
网页The separation processes are roughly classified into hydro- and pyrometallurgical routes. The current dominant zirconium production route involves pyrometallurgical ore cracking,
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Separation of hafnium from zirconium by anion
网页Separation of Hafnium From Zirconium by Anion Exchange John 1. Hague and Lawrence A. Machlan (September 13, 1960) The results of a systematic survey of the elution of
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Journal of Nuclear Materials ResearchGate
网页The separation of hafnium from zirconium is the key of the nuclear grade zirconium production. Most of the commer-cially used separation methods are hydrometallurgical
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SEPARATION OF ZIRCONIUM FROM HAFNIUM BY
网页The current work consists in the separation of zirconium and hafnium by the ion-exchange method in order to obtain a pure zirconium concentrate, suitable to be used in the
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STUDY OF THE SEPARATION OF ZIRCONIUM AND
网页and physical properties the hafnium (Hf) is commonly found in nature associated with zirconium minerals. Due to the similarity between Zr and Hf the separation of them is
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Separation of Hafnium from Zirconium and Their
网页It has been shown previously [1] that hafnium can be separated from zirconium using 3.5 percent sul- furic acid solution to elute from resin having 8 percent of divinylbenzene
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Highly efficient separation and enrichment of hafnium
网页2023年2月13日More information: Tingting Tang et al, Highly efficient separation and enrichment of hafnium from zirconium oxychloride solutions by advanced ion-imprinted membrane separation technology, Journal
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Separation of Zirconium and Hafnium: A
网页2014年1月1日The separation processes are roughly classified into hydro- and pyrometallurgical routes. The current dominant zirconium production route involves pyrometallurgical ore cracking, multi-step...
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Separation of Hafnium and Zirconium from Ti- and Fe
网页1999年4月1日This stone presents a new chemical separation method for Hf and Zr from rocks using extraction chromatographic resins prepared from inert polymeric supports and the liquid anionic exchangers tri- n -octylamine or
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Separation of Zirconium and Hafnium: A Review
网页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 process.
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Separation of zirconium and hafnium from early
网页2021年9月18日The resin is less suitable for hafnium separations as hafnium tends to bleed off the resin even at high concentrations of HCl. Introduction The separation of zirconium and hafnium isotopes from the early actinides and rare earth elements, including yttrium, is of interest for isotope production.
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Separation of hafnium from zirconium by anion
网页undetectable amount of hafnium. Thus, a good r fractionation of hafnium from zirconium resulted, but a clear-cut line of demarcation between the hafnium and zirconium fractions was not observed. Experience [4, 9] has shown that a separation can ,frequently be improved by proper adjustment of f column parameters. Accordi ngly, a column was
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Determination of hafnium at the 10 ScienceDirect
网页2014年1月2日Hafnium from zirconium separation Hafnium in zirconium determination Inductively coupled plasma-mass spectrometry 1. Introduction Hafnium is the main impurity of zirconium compounds, which usually contain 2–3% Hf. Both elements, if used by the nuclear industry, have to be separated.
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Journal of Nuclear Materials ResearchGate
网页separation, which starts from crude ore to hafnium-free zirconium metal product, shows a great potential for industrial application. However, it is still under investigation on laboratory scale [5].
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1 Thomas E. Garner, Zirconium and Hafnium
网页primary zirconium and hafnium manufacturing plants depend largely on the raw material used. Six basic operations may be performed: (1) sand chlori nation, (2) separation, (3) calcining, (4) pure chlorination, (5) reduction, and (6) purification. Plants that produce zirconium and hafnium from zircon sand use all six of these process steps
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STUDY OF THE SEPARATION OF ZIRCONIUM AND
网页However the separation of zirconium and hafnium require elaborate processes. Commercial processes known, four are used industrially: fractional crystallization, solvent extraction, distillation of chloride and ion exchange [3, 4, 5, 6].
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Zirconium and hafnium U.S. Geological Survey
网页2017年12月19日Zirconium and hafnium December 19, 2017 Zirconium and hafnium are corrosion-resistant metals that are widely used in the chemical and nuclear industries. Most zirconium is consumed in the form of the main ore mineral zircon (ZrSiO 4, or as zirconium oxide or other zirconium chemicals.
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Enhanced adsorption and separation of zirconium and
网页2020年5月15日Separation of zirconium and hafnium is one of the challenging problems due to their similar chemical behaviors and in general, their separation has been carried out under very high acidic conditions.
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Study of Zirconium and Hafnium Separation by Solvent
网页The extraction and separation behavior of zirconium and hafnium has been widely studied. There are several reports on the separation of these elements in different media and extractants. Figure 1 shows the structure of the extractants used in this work for the extraction of the zirconium and hafnium [ 16 ]. 3. Experimental 3.1. Feed Solutions
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Separation of zirconium and hafnium using Diphonix®
网页2009年2月1日Trennung von Zirkonium- und Hafnium-Komplexen an Ionenaustauschern. B. Bonefeld, F. Umland. Chemistry. 1985. SummaryA separation of zirconium and hafnium on ion-exchangers was obtained by use of 8-hydroxyquinoline-5-sulfonic acid as chelating agent.The separation is based on the difference in the stability.
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Highly efficient separation and enrichment of hafnium
网页2023年2月13日More information: Tingting Tang et al, Highly efficient separation and enrichment of hafnium from zirconium oxychloride solutions by advanced ion-imprinted membrane separation technology, Journal
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Separation of Zirconium and Hafnium: A Review
网页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 process.
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Separation of Hafnium and Zirconium from Ti- and Fe
网页1999年4月1日This stone presents a new chemical separation method for Hf and Zr from rocks using extraction chromatographic resins prepared from inert polymeric supports and the liquid anionic exchangers tri- n -octylamine or
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Separation of hafnium from zirconium by anion
网页Separation of Hafnium From Zirconium by Anion Exchange John 1. Hague and Lawrence A. Machlan (September 13, 1960) The results of a systematic survey of the elution of hafnium and zirconium in diluted sulfuric acid, and i!1 solutions of hydrochloric and sulfuric acids in water, are presented.
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Determination of hafnium at the 10 ScienceDirect
网页2014年1月2日Hafnium from zirconium separation Hafnium in zirconium determination Inductively coupled plasma-mass spectrometry 1. Introduction Hafnium is the main impurity of zirconium compounds, which usually contain 2–3% Hf. Both elements, if used by the nuclear industry, have to be separated.
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Journal of Nuclear Materials ResearchGate
网页separation, which starts from crude ore to hafnium-free zirconium metal product, shows a great potential for industrial application. However, it is still under investigation on laboratory scale [5].
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STUDY OF THE SEPARATION OF ZIRCONIUM AND
网页However the separation of zirconium and hafnium require elaborate processes. Commercial processes known, four are used industrially: fractional crystallization, solvent extraction, distillation of chloride and ion exchange [3, 4, 5, 6].
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1 Thomas E. Garner, Zirconium and Hafnium
网页Separation Iron is removed from the zirconium-hafnium solution from the feed makeup step by extraction. The iron freezirconium and hafnium solution is passed through a series of liquid-liquid extractions, stripping, and scrubbing steps toseparate zirconium from hafnium.
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Zirconium and hafnium U.S. Geological Survey
网页2017年12月19日Zirconium and hafnium December 19, 2017 Zirconium and hafnium are corrosion-resistant metals that are widely used in the chemical and nuclear industries. Most zirconium is consumed in the form of the main ore mineral zircon (ZrSiO 4, or as zirconium oxide or other zirconium chemicals.
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Study of Zirconium and Hafnium Separation
网页The extraction and separation behavior of zirconium and hafnium has been widely studied. There are several reports on the separation of these elements in different media and extractants. Figure 1 shows the structure
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Separation of hafnium from zirconium in hydrochloric
网页2019年1月17日The separation of hafnium from zirconium in a hydrochloric acid solution by solvent extraction was investigated with di (2-ethylhexyl)phosphoric acid (D2EHPA). The effects of hydrochloric acid concentration, extractant concentration, diluents, and temperature on the distribution coefficient of hafnium and zirconium were studied.
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Highly efficient and selective solvent extraction of
网页2021年12月15日The separation behavior of Zr ions and Hf ions by D2EHDGAA in an HCl system The reaction of Zr ions and Hf ions in water is extremely complicated, and ion ions exist in various forms.
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Separation of zirconium and hafnium using Diphonix®
网页2009年2月1日Trennung von Zirkonium- und Hafnium-Komplexen an Ionenaustauschern. B. Bonefeld, F. Umland. Chemistry. 1985. SummaryA separation of zirconium and hafnium on ion-exchangers was obtained by use of 8-hydroxyquinoline-5-sulfonic acid as chelating agent.The separation is based on the difference in the stability.
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Zirconium and Hafnium Separation, Part 1. Liquid
网页Zirconium and Hafnium Separation 1929. by the slow change in the composition of the extractable aqueous species on ageing (23, 24). An increase in hydrochloric acid concentration (up to 7M) promotes
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