Abstract
The Hall-Héroult process, in which a melt of cryolite containing purified alumina up to ca. 6 wt. % is electrolyzed, is the principal basis for production of aluminum metal. The chemistry and electrochemistry of this process have been extensively studied; however, much remains to be understood about the reactions at the carbon anode, where oxygen or oxyfluoride anions are discharged with evolution of gaseous compounds, e.g., CO2, CO, and COF2.
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Djokić, S.S., Conway, B.E. (1994). Electroanalytical Methods for Determination of Al2O3 in Molten Cryolite. In: Conway, B.E., Bockris, J.O., White, R.E. (eds) Modern Aspects of Electrochemistry. Modern Aspects of Electrochemistry, vol 26. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1733-1_5
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