Browsing Research Articles (Chemical Engineering) by Subject "Ion exchange"

Browsing Research Articles (Chemical Engineering) by Subject "Ion exchange"

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  • Characterization of urea-modified Palabora vermiculite 
    Muiambo, Herminio Francisco; Focke, Walter Wilhelm; Atanasova, Maria Todorova; Benhamida, Aida (Elsevier, 2015-03)
    Replacing the exchangeable interlayer ions in Palabora vermiculite with magnesium, aluminumor iron (III) ions does not affect the exfoliation onset temperature (456± 11 °C). However, co-intercalation of minor amounts ...
  • Ion exchanged vermiculites with lower expansion onset temperatures 
    Muiambo, H.F. (Herminio Francisco); Focke, Walter Wilhelm (Routledge, 2012-02)
    South African Palabora vermiculite was modified by ion exchange with ammonium and selected alkali metal and alkaline earth metal ions. In the exchanged vermiculite with ammonium ions, it was found that ammonia and water ...
  • Thermal properties of sodium-exchanged Palabora vermiculite 
    Muiambo, Herminio Francisco; Focke, Walter Wilhelm; Atanasova, Maria Todorova; Van der Westhuizen, Isbe; Tiedt, Louwrens R. (Elsevier, 2010-09)
    Palabora “vermiculite” represents an interstratified vermiculite-biotite containing less than 50% vermiculite. The sodium-exchanged form was prepared by immersion in saturated brine at ambient conditions. The sodium content ...