Browsing by Subject "Zirconium"
Now showing items 1-10 of 10
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Automation of membrane based solvent extraction for Zr and Hf separation
(North-West University (South Africa), Potchefstroom Campus, 2015)In recent years, research into metal ion extraction using hollow fibre membranes has grown, focussing on the extraction of a wide range of metals including base, transition, and rare earth metals. This non dispersive solvent ... -
Automation of membrane based solvent extraction unit for Zr and Hf separation
(Elsevier, 2017)In recent years, research into metal ion solvent extraction using hollow fibre membranes has grown. Current studies generally use an analogue controlled experimental setup. Although the analogue system is sufficient for ... -
The hafnium-selective extraction from a zirconium(hafnium) heptafluoride ammonium solution using organophosphorus-based extractants
(Taylor & Francis, 2018)The suitability of the organophosphorus-based extractants, DiOPA, Ionquest 801 and D2EHPA was evaluated for the selective extraction of Zr and Hf from an (NH4)3Zr(Hf)F7 acidic solution using both dispersive and pertraction ... -
Mechanistic study of hafnium and zirconium extraction with organophosphorus extractants
(Taylor & Francis, 2018)Research on the purification of Zr has increased in the last few decades and although effective processes have been developed, little is known about the mechanism of Hf and Zr extraction; particularly, at low acid ... -
The selective extraction of Hf from Zr(Hf)Cl4(aq) using organophosphorous derivatives
(North-West University (South Africa), 2015)While traditional solvent extraction (SX) separations of Zr and Hf focus on the preferential extraction of Zr (majority solute) from Hf (minority solute), the aim of this study was to ascertain whether the selective ... -
Selective membrane based solvent extraction of Hf from a (NH4)3Zr(Hf)F7 solution
(North-West University (South Africa), Potchefstroom Campus, 2016)Zr and Hf, which co-exist in nature, have similar chemical properties, except for their Zr and Hf, which co-exist in nature, have similar chemical properties, except for their absorbance of neutrons which implies that Zr ... -
Separation of hafnium from zirconium using membrane based solvent extraction
(North-West University (South Africa)., 2022)The need for purified Zr and Hf has become imperative with the development of the nuclear industry. Solvent extraction (SX) processes, such as the TBP and MIBK processes have been successfully applied for the industrial ... -
The separation of zirconium and hafnium from (NH4)3Zr(Hf)F7 using amine-based extractants
(SAIMM, 2016)The suitability of the amine-based extractants Alamine 336, Aliquat 336 and Uniquat 2280 (10 wt%) for the selective extraction of zirconium (Zr) and hafnium (Hf) from a (NH4)3Zr(Hf)F7 solution was investigated. The ... -
Solvent extraction and separation of hafnium from zirconium using Ionquest 801
(SAIMM, 2016)The solvent extraction (SX) characteristics of Ionquest 801 were investigated to determine if the selective extraction of hafnium (Hf) over zirconium (Zr) is possible. Firstly, Ionquest 801 was screened for its suitability ... -
The speciation and solvent extraction of zirconium and hafnium : a computational and experimental approach
(North-West University (South Africa), Potchefstroom Campus, 2015)Zirconium and hafnium have important applications within the nuclear industry, where zirconium is used to clad the uranium fuel rod tubes that are used during nuclear reactions and hafnium is used in the control rods which ...
