Browsing Natural and Agricultural Sciences by Subject "Solvent extraction"
Now showing items 1-7 of 7
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The cobalt-nickel pertraction refinery to process recycled spent catalysts leach solutions
(North-West University (South Africa), 2019)Over the last two years, the cobalt (Co) price has increased considerably. The observed increase can be attributed to the increase in demand of lithium-ion batteries (LIBs) of which Co forms an integral part. As a consequence ... -
Molecular modelling of species pertaining to the solvent extraction of tantalum penta-fluorides
(North-West University, 2018)Solvent extraction (SX) is used for the separation and purification of various metals, including tantalum (Ta) and niobium (Nb). Industrial processes for the separation of Ta and Nb traditionally use high concentrations ... -
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 ... -
The separation of light lanthanoids through pertraction
(North-West University (South Africa), 2019)The light lanthanoid elements (57-60) are the most common of the f-block elements. These elements are plentiful and upon their discovery, the specified application of individual elements have grown alongside our ability ... -
Separation of tantalum and niobium by solvent extraction
(North-West University, 2012)Niobium (Nb) and tantalum (Ta) are found in the same group (VB) of the periodic table of elements and therefore have similar chemical properties, which is the reason why they are difficult to separate. They are usually ... -
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 ...