Question

I need a simplified and summarized version of the extraction of Aluminum using electrolysis.

Answer 1

Answer:

Alcoa Process:

Al Reaction 2.74: 23+2+32→23++2

Explanation:

2O3 from the Bayer process is chlorinated under reducing condition in the presence of C at (700-900)0 C to produce AlCl3, CO, CO2. AlCl3 vapour from the reaction is condensed at 700C in a fluid bed containing AlCl3 particles. The solid AlCl3 particles containing feed into an electrolytic cell containing a fused chloride electrolyte (AlCl3+NaCl+LiCl) at 7000 C. On electrolysis, Al (liquid) formed at the cathode, gaseous Cl2 liberated at the anode.

Answer 2

Instead, it is extracted by electrolysis. The ore is first converted into pure aluminium oxide by the Bayer Process, and this is then electrolysed in solution in molten cryolite - another aluminium compound. The aluminium oxide has too high a melting point to electrolyse on its own. The usual aluminium ore is bauxite.