Concept of On-Site Electro Chlorination

Concept of electro chlorination is an electrolysis process wherein either natural seawater or an artificial brine solution (fresh water + salt) is converted into sodium hypochlorite solution.

Salt is composed of sodium and chloride. When DC (direct current) is passed through titanium electrodes to the electrolyte, the chlorides will disassociate to form chlorine. The process is basically as follows:

Electrolysis occur in an undivided cell when a DC current is passed through a saline water solution
(e.g. seawater or brine solution)
At the anode: Oxidation of chloride ions to produce chlorine (Cl₂)
At the cathode: Reduction of water to produce sodium hydroxide (NaOH) and hydrogen (H₂)
Liberated chlorine reacts with the sodium hydroxide to produce sodium hypochlorite (NaOCl) instantaneously

The overall reaction, sustained by electrical energy, is as follows:

2NaCl (salt) + H₂O (water) →

NaOCl (hypo) + NaCl (salt) + H₂ (hydrogen)