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.
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.
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
