2. Mercury process

2.1 Process principle

The basic principle of the mercury process (figure 11 ) is to produce chlorine in the electrolysis cell and soda ash and hydrogen in a separate reactor called the decomposer. At the anode, chlorine is produced by oxidizing chloride.

At the cathode, sodium amalgam is formed in mercury at a content of around 0.2% by mass by reduction of the Na ⁺ ion according to the reaction : ${Na}^{+} + e^{-} \overset{Hg}{\to} NaHg$

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Mercury process

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References

(1) - SCONCE (J.S.) - Chlorine. Its manufacture, properties and uses - . American Chemical Society Monograph Series, Reinhold Publishing Co. (1962).
(2) - ULLMANN's Encyclopedia of Industrial Chemistry - . Vol. A6, p. 399-481, VCH (Verlag...