Chloralkali process

The chloralkali process is a chemical process that involves the electrolysis of sodium chloride solution to produce chlorine gas, hydrogen gas, hypochlorite, and caustic soda (sodium hydroxide). It is a widely used industrial process for the production of chlorine gas.From: Modern Ceramic Engineering [2019], Development of in-situ electro-generated chlorine leaching and its application to the leaching of platinum [2022], Modern Ceramic Engineering [2018]

Electrical Behavior

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Published in David W. Richerson, William E. Lee, Modern Ceramic Engineering, 2018

David W. Richerson, William E. Lee

Electrochlorination is used for water purification, chlorination of swimming pools, and disinfecting sea water used for cooling at power stations or on large ships. A small electric current applied through a ceramic electrode causes decomposition of water and the dissolved sodium chloride adjacent to the electrode to yield hypochlorous and/or hypochlorite ions. These ions have strong disinfecting capabilities. The chloralkali process involves the electrolysis of NaCl to produce chlorine, hydrogen, hypochlorite, and NaOH (caustic soda). Currently, electrodes for the chloralkali process are graphite- or titanium-coated, ruthenium-doped TiO2.

Development of in-situ electro-generated chlorine leaching and its application to the leaching of platinum

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Published in Geosystem Engineering, 2022

Min-Seuk Kim, Rina Kim, Kyeong-Woo Chung, Jae-Chun Lee

In most cases, chlorine leaching uses chlorine gas as an oxidant, a strongly reactive greenish-yellow gas, and dissolves in an aqueous solution. The chloralkali process, the electrolysis of sodium chloride solution, provides most industrial chlorine gas (Lakshmanan & Murugesan, 2014). Electrolysis generates chlorine gas at the anode according to reaction (1) while producing hydrogen gas and sodium hydroxide at the cathode as reactions (2) and (3).

Chloralkali process

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Electrical Behavior

Development of in-situ electro-generated chlorine leaching and its application to the leaching of platinum