The process of extraction of sodium on a commercial scale by the electrolysis of fused sodium chloride is called:

The process of extraction of sodium on a commercial scale by the electrolysis of fused sodium chloride is called Down’s process. In this process, down's electrolytic cell, consists of an iron box through the bottom of which rises a circular carbon anode. The anode is surrounded by a ring shaped iron cathode enclosed in a wire gauze shell which also acts as a partition and separates the two electrodes. On electrolysis, chlorine is liberated at the anode and let out through an exit at the top. Sodium is liberated at the cathode and remains in the wire-gauze shell. Level of molten sodium rises and it overflows into a receiver.