CA1083357A - Method of separating hafnium from zirconium ...
ABSTRACT OF THE DISCLOSURE A method for separating hafnium and zirconium is disclosed in which unseparated zirconium and hafnium are dissolved in the molten state in a solvent metal, preferably zinc. This molten metal phase is contacted with a fused salt phase which includes a zirconium salt as one of its components. The desired separation is effected by mutual displacement, with …
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(PDF) Zirconium and Hafnium Separation, Part 3. Ligand ...
A survey was presented of the domestic and overseas new technology relating to separating zirconium and hafnium by solvent extraction, and the work carried out on the extractants, such as acidic ...
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Extraction chromatography based separation of zirconium(IV ...
Extraction chromatography based separation method for the removal of Zr(IV) from high active waste originated from U–Pu–Zr fuel. • Spent U–Pu–Zr metallic fuel has significantly high amounts of zirconium as compared to other fuels which complicates conventional reprocessing and subsequent process.
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Separation of niobium, tantalum, titanium and zirconium ...
A method for the separation and determination of titanium, zirconium, niobium and tantalum is described. Niobium and tantalum are separated with pyrogallol from titanium and zirconium and determined by the N-benzoyl-N-phenyl hydroxylamine method.
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Separation of hafnium and zirconium by liquid-liquid ...
Separation of hafnium and zirconium by liquid-liquid extraction Author: Howard Carl Peterson Keywords: Extraction (Chemistry);Hafnium;Zirconium;Chemical engineering; …
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Separation of zirconium and hafnium by solvent extraction ...
Zirconium metal should contain less than 100 ppm hafnium for use in nuclear reactors. For this reason, it is necessary to separate the hafnium from the zirconium, although complicated and expensive separation methods are required to remove hafnium.
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A new way to ensure selective zirconium ion adsorption ...
The method includes the chemical separation of Zr (isobaric interference of ⁹⁰Zr) from the samples followed by determination of ⁹⁰Sr/⁸⁸Sr abundance sensitivity (2.1 × 10⁻¹⁰).
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Solvent extraction separation of zirconium(IV) from ...
Extraction as a function of N-n-octylaniline concentration In order to optimize the conditions for the extraction of zirconium(IV), xylene solutions of N-n-octylaniline of varying concentration (0.1 % to 15 %) were em- ployed. It was found that 10 mL of 3 % N-n-octylaniline was sufficient for the quantitative extraction of 150 g zirconium(IV) from 0.01 M sodium succinate at
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METHOD OF SEPARATING HAFNIUM FROM ZIRCONIUM. …
A method for separating hafnium and zirconium is disclosed in which unseparated zirconium and hafnium are dissolved in the molten state in a solvent metal, preferably zinc. This molten metal phase is contacted with a fused salt phase which includes a zirconium salt as one of its components. The desired separation is effected by mutual ...
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Zirconium and hafnium tetrachloride separation by ...
This patent describes an extractive distillation method for separating hafnim tetrachloride from zirconium tetrachloride of the type wherein a mixture of zirconium and hafnium tetrachlorides is introduced into an extractive distillation column, which distillation column has a reflux reboiler connected at the bottom and a reflux absorber connected at the top and wherein a molten salt solvent is ...
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EXTRACTION AND SEPARATION OF ZIRCONIUM AND …
the separation and purification of these elements is of great importance. Solvent extraction techniques are employed to separate and purify these elements on an industrial scale. However, the separation of zirconium and hafnium is a difficult task as both elements …
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EP1854801A1 - Method for separating zirconium and hafnium ...
Separation of zirconium- and hafnium compound comprises subjecting a mixture containing a hafnium compound (I) and zirconium compound (II), which contains a carbon atom, to fractional crystallization. Separation of zirconium- and hafnium compound comprises subjecting a mixture containing a hafnium compound (I) of formula (HfR 4) and zirconium compound (II) of formula (ZrR 4), which contains a ...
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Method of separation of zirconium and hafnium
"Method of separating zirconium and hafnium". Chemistry of nuclear fuel, M, 1956, s-522). There is a method in which the separation of zirconium and hafnium regulate by changing the concentration of HNO 3 and NaNO 3 to recognize the nom solution. First, when the total concentration of acid and vicariates 1,5÷3.5 mol/l extract the main part of ...
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Production of nuclear grade zirconium: A review ...
The methods utilize the difference of zirconium and hafnium in redox characteristics and electrochemical properties encounter difficulties in practical operation. The extractive distillation is considered to be the most notable pyrometallurgical method for Zr–Hf separation and is the only industrialized pyrometallurgical separation method.
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Modern Methods for the Separation of Rarer Metal Ions ...
Modern Methods for the Separation of Rarer Metal Ions describes several separation methods of more than 50 elements. This book is divided into 19 chapters that include separation methods involving the actinide elements, rare earths, and many rarer elements of the main and transition groups of the periodic table. The introductory chapter discusses the principles of the separation …
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(PDF) Separation of Zirconium and Hafnium: A Review
zirconium production with emphasis on the methods of Zr e Hf separation. The separation processes are The separation processes are roughly classi fi ed into hydro- and pyrometallurgical routes.
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A novel solid-phase extraction method for separation and ...
This work assesses the use of modified natural clinoptilolite as an adsorptive material for separation and preconcentration of trace amounts of zirconium ions. A simple, rapid and economical method was developed for the preconcentration of trace amounts of zirconium in aqueous medium using 1-(2-pyridylazo)-2-naphthol as a complexing agent. Effect of sample pH, flow rate of sample and …
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Process for the Separation and Purification of Hafnium and ...
1. 1-29. (canceled) 30. A process for separation of hafnium and zirconium from a mixture containing ZrCl 4 and HfCl 4, the process comprising: introducing the mixture of ZrCl 4 and HfCl 4 in vapour form into a continuous extractive distillation column; selective absorption of the ZrCl 4 and HfCl 4 vapours by an extraction solvent circulating in a counter-current to a stream of the vapours in ...
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Methods of Separation - Learn Various Separation ...
The most common method of separating a liquid from an insoluble solid is the filtration. Take, for example, the mixture of sand and water. Filtration is used here to remove solid particles from the liquid. Various filtering agents are normally used like filtering paper or other materials.
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Separation of hafnium from zirconium by anion exchange
methods for the separation of niobium from tantalum [5, 9, 10] and of molybdenum from tungsten [2, 9, "10], and a promising start has even been made on separating the rare earths [12J. I Previous work on zirconium-hafnium mixtures has shown that fractionation on anion-exchange
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Separation of Zirconium and Hafnium from Early Actinides ...
Methods are proposed for the concentration and separation of Bk(IV) and Ce(IV) from the other transplutonium and rare earth elements on an anion exchange resin inmore » « less SEPARATION OF TRACES OF THE RARE EARTH ELEMENTS FROM URANIUM BY MEANS OF AMBERLITE IR-120 RESIN
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SEPARATION OF ALUMINUM AND ZIRCONIUM BY THE METHOD …
@article{osti_4306671, title = {SEPARATION OF ALUMINUM AND ZIRCONIUM BY THE METHOD OF ION-EXCHANGE}, author = {Usatenko, Yu I and Gureyeva, L I}, abstractNote = {The method is based on the fact that Zr is absorbed by the cathionite from more acidic solutions than Al. Greatest absorption power is exhibited by the cathionite KU-1 (maximumn acidity 1.5 M; next best is cathionite SBSR …
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US Patent for Method for separating hafnium from zirconium ...
The method recognizes that the ratio of total acid in the feed stock to total metal Zr+Hf species must be maintained at certain levels to achieve system stability for the Hf extraction process. Described herein is a method for separating hafnium and zirconium, and, alternatively to optimize separation thereof.
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Solvent Extraction Separation of Zirconium (iv) With ...
The chlorocomplex of zirconium was extracted from 6–10 M hydrochloric acid with trioctylamine 1–5, triisooctylamine 6 or Aliquat 3365 7. The sulphotocomplex of zirconium was extracted with Aliquat 3365 8, Primine JMT 9, Alamine 336 10. The nitratocomplex was less extensively utilised for the extractive separation of zirconium 11, 12.
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Method of separating metals such as zirconium and haffnium
FIELD: hydrometallurgy. SUBSTANCE: invention relates to a method allowing separation of some metals, in particular zirconium and haffnium. Method comprises separating metal 1 from metal 2 in aqueous solution of these metals. Being in solution, metals form polymers and/or copolymers, which prevents their passage through nanofiltration membrane.
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Separation of Zirconium-95, 97 and Niobium-95, 97 from ...
Journal of NUCLEAR SCIENCE and TECHNOLOGY, 3 (8), p.5Z6~332 (August 1966). Separation of Zirconium-95, 97 and Niobium-95, 97 from Fission Product-Mixtures and Irradiated Uranium by an Extraction Method using 8-Quinolinol
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US4072506A - Method of separating hafnium from zirconium ...
A method for separating hafnium and zirconium is disclosed in which unseparated zirconium and hafnium are dissolved in the molten state in a solvent metal, preferably zinc. This molten metal phase is contacted with a fused salt phase which includes a zirconium salt as one of its components. The desired separation is effected by mutual displacement, with hafnium being transported from the ...
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Development of a separation method for molybdenum from ...
A method for separation of Mo from Zr, Nb, and other major elements of rubble samples from the Fukushima Daiichi Nuclear Power Station (FDNPS) was developed to enable 93 Mo assay of the rubble samples. Although 93 Mo analysis has been reported in a few studies, the known separation method is tedious and time consuming, or the target is a simple material.
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Application of Low Melting Metals for Separation of ...
Closeness of electrochemical properties of uranium and zirconium makes separation of these metals in pyroelectrochemical reprocessing of spent nuclear fuels a challenging task. Varying electrode material can change metals' deposition potentials. The study was aimed at assessing the effect of the cathode material on deposition potentials of zirconium and uranium from 3LiCl–2KCl based melts.
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Separation of hafnium and zirconium by liquid-liquid ...
baddeleyite. Hafnium is associated with zirconium in all natural occurring ores to approximately 2 per cent by weight. Hafnium, having a high neutron cross-section, must be removed from the zirconium prior to use in nuclear reactors, Hudswell (8) has reviewed the separation of …
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(PDF) The Separation Of Zirconium And Hafnium Download eBOOK
A New Method for the Separation of Zirconium and Hafnium by Cellulose Chromatography. Authors: W. M. Leaders. Categories: Hafnium. Type: BOOK - Published: 1951 - Publisher: Get BOOK. Books about A New Method for the Separation of Zirconium and Hafnium by Cellulose Chromatography. Language: en
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Separation of zirconium and hafnium from early actinides ...
The separation of trace zirconium from yttrium mass on Pb resin is a significant improvement over the anion exchange resin method for this separation and has advantages compared to the hydroxamate-modified cation exchange resin separation used to separate PET isotope 89 Zr from yttrium targets as the yield and elution volumes are similar, but ...
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Separation of zirconium from hafnium in sulfate medium ...
Therefore, this preliminary indicated that the extractant BEAP can be used for the effective separation of zirconium and hafnium. It would be possible to get nuclear zirconium with < 0.01% HfO 2 by using much more extraction and scrubbing stages. Download : Download high-res image (98KB) Download : Download full-size image; Fig. 8.
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