Mercury cell chlor-alkali production is a significant user of mercury and a source of mercury releases to the environment. The mercury used in this process acts as a catalyst in the chlorine production process. Best practices, such as proper waste management, can minimize the release of mercury. Mercury-free technologies are also available in chlor-alkali production.
According to data compiled by the Global Mercury Partnership, some 100 facilities in 44 nations today have some industrial mercury cell chlorine capacity. After accounting for pledges and plans for future closure in the European Union, India and the United States of America, 55 plants will remain in 24 countries.
Mercury cell production facilities that close or convert to mercury-free technologies require environmentally sound management of mercury surplus and waste.
Image courtesy of Euro Chlor, Mercury Cell animation.