Browsing Research Articles (Chemical Engineering) by Subject "Hafnium"

Browsing Research Articles (Chemical Engineering) by Subject "Hafnium"

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  • Selective sublimation/desublimation separation of ZrF4 and HfF4 
    Postma, C.J. (Catharina); Lubbe, S.J. (Salomon); Crouse, Philippus L. (Southern African Institute of Mining and Metallurgy, 2017-10)
    The separation of zirconium and hafnium, which is essential in the nuclear industry, is difficult due to the great similarities in their chemical and physical properties. In contrast to the traditional aqueous ...
  • Separation of zirconium and hafnium by extraction with 2-octanol 
    Kabangu Mpinga, John; Lubbe, S.J. (Salomon); Crouse, Philippus L. (The Italian Association of Chemical Engineering, 2019-01)
    Zirconium and hafnium are shown to be separable using 2-octanol (C8H18O) as an extractant. Zirconium basic carbonate was dissolved using hydrochloric acids at concentrations ranging from 5 % to 20 %. Potassium fluoride ...
  • Solvent extraction of Zirconium and hafnium with 1 and 2-octanol: a comparative study 
    Kabangu Mpinga, John; Lubbe, Simon J.; Crouse, Philippus L. (The Italian Association of Chemical Engineering, 2019)
    Comparative solvent extraction studies of Zr and Hf were carried out from acidic chloride and potassium fluoride solutions with 1 or 2-octanol as extractants. The extraction process was experimentally investigated as a ...
  • Sublimation kinetics of zirconium tetrafluoride 
    Pretorius, C.J.; Pienaar, A.D.; Crouse, Philippus L.; Niemand, H.F. (Trans Tech, 2014)
    An important step of a new process being developed for the beneficiation of the mineral zircon (Zr(Hf)SiO4) to produce nuclear grade zirconium (Zr) metal, is the separation of the Zr from the hafnium (Hf). Zr ores typically ...