In Chlor-alkali industries three types of electrolytic processes are adopted for the production of caustic, chlorine, and hypochlorite chemicals :
Diaphragm cell process ( box anode, perforated anode )
Membrane cell process ( louver anode, mesh anodes )
Mercury cell process ( mesh, strip anode, rod, weir anode )
In each process salt ( brine ) solution is electrolyzed by the action of a direct electric current, which converts the chloride ions to chlorine.
The reaction is :
2NaCl + 2H2O = Cl2 + H2 + 2NaOH
In all the methods chlorine (Cl2) is produced at the positive electrode ( anode ) and the hydrogen (H2) and Sodium Hydroxide ( NaOH or caustic soda ) are produced directly or indirectly at the negative electrode ( cathode ). Membrane Diaphragm or Mercury is used to separate the anode products from the cathode products according to the process adopted.
World Chloralkali Production in millions of tons per year
| 1965/69 | 1980 | 1995* | |
|---|---|---|---|
| Chlorine | 16.3 | 31.3 | 56.3 |
| Caustic Soda | 18.8 | 33.1 | 59.0 |
TYPES OF CHLOR ALKALI ANODES WE OFFER ( membrane cell anode )
Monopolar Mesh, Monopolar Louver Type Membrane Cell Anode Bipolar Mesh Type Anode, Bipolar Louver Type Membrane Cell Anode
TYPES OF CHLOR ALKALI ANODES WE OFFER ( diaphragm cell anode )
mesh type diaphragm cell anode, perforated plate type diaphragm cell anode, box type diaphragm cell anode
