CHLOR ALKALI PROCESS
 
ASC Chlor Alkali process makes use of cation exchange membrane technology, which is the most advanced, very efficient and the most environmentally friendly chlor alkali technology producing high quality products fulfilling a wide range of demanding applications. The chlor alkali process involves the electrolysis of aqueous sodium chloride (NaCl solution or brine) in a membrane cell producing chlorine (Cl2) and its co-products caustic soda (sodium hydroxide, NaOH) and hydrogen gas (H2).

In the membrane cell, the anode chamber and cathode chamber are separated by a cation-permeable membrane. Saturated brine (NaCl solution) which consists of Na+ and Cl ions is fed to the anode chamber.

A DC current is passed through the cell.

At the anode, the chloride ions (Cl) in brine solution (NaCl) are oxidized to chlorine (Cl2):
            2 NaCl (aq) + 2 H2O (l) → 2 NaOH (aq)  + Cl2 (g) + 2 H+   + 2 e

And at the cathode, hydrogen ions (H+) in water is reduced to hydrogen gas (H2):
            2 H+  +  2 e  →  H2 (g)

The ion-permeable membrane at the center of the cell plays the important role of allowing the sodium ions (Na+) in the anode chamber to pass to the cathod chamber where they react with the hydroxide ions (OH) to produce caustic soda (NaOH).

The overall reaction for the electrolysis of brine is thus:

            2NaCl (aq)  + 2H2O (l) → Cl2 (g) + H2 (g) + 2NaOH (aq)

Another product, sodium hypochlorite (NaClO) is produced when chlorine (Cl2) is reacted with caustic soda (NaOH).

            Cl2 + 2 NaOH → NaCl + NaClO + H2O

Because of the corrosive nature of the chlorine produced, the anode has to be made from a non-reactive metal such as titanium, whereas the cathode can be made from Nickel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ASC at Glance


       

 

 

 

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Celebrating ASC 34th Anniversary with Gunung Sugih Society   As a routine agenda to celebrate company anniversary with surrounding society, on Sunday (03/09) PT Asahimas Chemical engage thousands of Gunung Sugih subdistrict... Read more

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  PT. Asahimas Chemical's PVC-5 Factory Inauguration (Phase-7)   On 1st April 2022, Minister of Industry RI Agus Gumiwang which representated by Ignatius Warsito as Plt. Director General of Pharmaceutical Chemical and Textile... Read more

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Obedient and Timely Taxpayer, ASC Received Taxpayer Award

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GM PT PLN (Persero) UID Banten Visit

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Humanitarian Assistance for Victims Floods in Lebak

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Asahimas Chemical Wins Green PROPER 2019

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World Trade Centre
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Jl. Jend. Sudirman Kav 29-31
Jakarta 12920 , Indonesia
Phone : (021) 521 1181, Fax (021) 521 1181
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Cilegon 42447 - Banten Indonesia
Phone (0254) 601 252
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