11/30/2023 0 Comments Cathode reactionIn mercury electrolysis cells, mercury as the liquid cathode reacts with sodium ions to form sodium amalgam (Na + + Hg + e − → ∙NaHg), whereas Cl 2 is formed on the anode. ![]() At present, membrane electrolytic cell technology accounts for approximately 81% of the global chlor-alkali capacity. The chlor-alkali industry has experienced a long development process from mercury, diaphragm electrolytic cells to ion exchange membrane (IEM) electrolytic cells. Therefore, energy saving and emission reduction in the chlor-alkali production process are important development directions. However, the current chlor-alkali process is one of the industries with high energy consumption, releasing large amounts of pollutants and causing serious environmental problems. NaOH is also a common chemical raw material that is widely used in the production of detergents, herbicides, pesticides, medicines, plastics, and soaps. Chlorine has been used in a variety of applications, including the production of building materials such as polyvinyl chloride, organic synthesis, metallurgy, water treatment, and the manufacture of titanium dioxide. ![]() Each ton of chlorine consumes about 2200–2600 kW∙h of electricity, and the global chlor-alkali industry needs to consume over 150 TW∙h of electricity every year, accounting for about 10% of global electricity. ![]() The global annual production of chlorine exceeds 75 million tons. The chlor-alkali process is one of the most basic chemical industries, mainly producing chlorine (Cl 2) and sodium hydroxide (NaOH).
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