Electrolysis of Aluminium Oxide
Alumina refineries employ the Bayer process that releases alumina from the bauxite in a caustic soda solution within a digester. They are called. Gcse Science Daily Revision Task 152 Gcse Science Science Daily Science Revision 4Na O 2 2Na 2 O. . Elemental aluminium cannot be produced by the electrolysis of an aqueous aluminium salt because hydronium ions readily oxidize elemental aluminium. Na 2 O H 2 O 2NaOH. Instead it is extracted by electrolysis in the Hall-Héroult process. It thus excludes alloying and scraps additions in cast metal production. The most common process for making alumina from bauxite is the Bayer process which was first discovered over 100 years ago but is still in wide use today. While this data does not fully represent a primary ingot ie excluding alloying elements and metal. In the HallHéroult process alumina Al 2 O 3 is dissolved in. Although a molten aluminium salt could be used i