Processes of Chlor-Alkali Electrolysis

In the chlor-alkali electrolysis process, an aqueous solution of sodium chloride is decomposed by direct current into chlorine, hydrogen, and a sodium hydroxide solution  

Three processes are used, the mercury process (invented in the 1880s), the diaphragm process (1890s), and the membrane process (1970). In all three cases nearly 

Poly(vinyl chloride) (doors and window frames, pipes, medical supplies, clothing) Isocyanates and oxygenates (insulation, footwear, plastics, pesticides, car paints) Inorganics (disinfectants, water treatment, paint pigments) 

Epichlorohydrin (pesticides, epoxy resins, sports boats, fishing rods) 

Chloromethanes (silicon rubbers, decaffeinators, Tefion, paint strippers, cosmetics) Solvents (metal degreasing, adhesives, dry cleaning plastics) 

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Three processes of chlor-alkali electrolysis are currently used, namely, the mercury process, diaphragm process, and membrane process. With regard to energy consumption and environmental concerns, the membrane process is the most efficient. 

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