UNEP Global Mercury Partnership: Chlor-Alkali Area

The mercury-cell process is one of three manufacturing processes used by the chlor-alkali sector to produce chlorine and caustic soda. Mercury-cell chlor-alkali production remains a significant use of mercury globally and can be a significant source of mercury releases to the environment. Mercury-cell facilities which close or convert to non-mercury technologies require careful site management as well as management of any excess mercury.