Electrolytic reduction method is used in extraction of:

Fused NaCl is electrolyzed. The metal sodium will be deposited at cathode and chlorine gas liberated at anode.

$2\mathrm{NaCl}\to 2\mathrm{Na}+2{\mathrm{Cl}}^{-}$

At Cathode $2\mathrm{Na}+2{\mathrm{e}}^{-}\to 2\mathrm{Na}\left(\mathrm{Reduction}\right)$

At Anode $2{\mathrm{Cl}}^{-}\to {\mathrm{Cl}}_2+2{\mathrm{e}}^{-}$(Oxidation)