The reaction occurring between gaseous CF4 and oxides dissolved in different molten fluorides. Some practical aspects

When CF₄ is bubbled through molten fluorides containing dissolved oxides within the range 900–1020° C, a chemical reaction takes place which decreases the oxide concentration and yields CO₂ and F^– ions. The possibility of the reaction between the CF₄ evolved at the anode and dissolved alumina, occurring during the anode effect in aluminium reduction cells, is discussed. This reaction provides a simple and convenient method for removing oxides and hydroxides from molten fluorides.