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dc.contributor.authorConradie, E.W.
dc.contributor.authorVan der Westhuizen, D.J.
dc.contributor.authorKrieg, H.M.
dc.contributor.authorNel, J.T.
dc.date.accessioned2017-01-30T14:06:05Z
dc.date.available2017-01-30T14:06:05Z
dc.date.issued2016
dc.identifier.citationConradie, E.W. et al 2016. The separation of zirconium and hafnium from (NH4)3Zr(Hf)F7 using amine-based extractants. Journal of the Southern African Institute of Mining and Metallurgy, 116(10):915-920. [http://dx.doi.org/10.17159/2411-9717/2016/v116n10a4]en_US
dc.identifier.issn2411-9717 (Online)
dc.identifier.issn2225-6253
dc.identifier.urihttp://hdl.handle.net/10394/19895
dc.identifier.urihttp://dx.doi.org/10.17159/2411-9717/2016/v116n10a4
dc.identifier.urihttp://www.scielo.org.za/pdf/jsaimm/v116n10/06.pdf
dc.description.abstractThe 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 extractant-containing organic phase consisted of cyclohexane and 5 v/v% 1-octanol as phase modifier. The (NH4)3Zr(Hf)F7 was dissolved in either hydrochloride acid or sulphuric acid (0.01-8.0 mol/dm3). The following variables were investigated: (i) the type and concentration of the acid, (ii) the equilibrium time, (iii) the organic/aqueous phase ratio and (iv) the extractant to metal ratio. Subsequently, using the optimized extraction conditions, the stripping of extracted metals from the organic phase was investigated using sodium chloride and sulphuric acid. The metal content in the aqueous phase was determined using ICP-OES before and after extractions. When using sulphuric acid solutions, extractions of >80% were reached both for Zr and Hf. In all cases equilibrium was achieved in less than 25 minutes of contact between the organic and the aqueous phase. Stripping of metals was achieved with >40% separation and 50% extraction using a sodium chloride (0.7 mol/dm3) stripping solutionen_US
dc.language.isoenen_US
dc.publisherSAIMMen_US
dc.subjectZirconiumen_US
dc.subjectHafniumen_US
dc.subjectAmine extractantsen_US
dc.subject(NH4)3Zr(Hf)F7en_US
dc.titleThe separation of zirconium and hafnium from (NH4)3Zr(Hf)F7 using amine-based extractantsen_US
dc.typeArticleen_US
dc.contributor.researchID12839981 - Van der Westhuizen, Derik Jacobus
dc.contributor.researchID11087137 - Krieg, Henning Manfred
dc.contributor.researchID22825452 - Conradie, Elizabeth Wilhelmina


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