Chlor-Alkali Process

Home  »  Applications  »  Chemicals

Improved Efficiency & Economics of Chlor-Alkali Systems

Proton exchange membranes such as Nafion® have been traditionally used in electrolysis applications as the perception has been that AEMs are too low in conductivity and lacking chemical robustness. However, with the introduction of Aemion™, which is a high-performance, highly stable anion-exchange membrane, the efficiency and economics of chlor-alkali systems can be significantly improved. Existing PEM systems can also use non-fluorinated Pemion™, which will reduce the environmental impact of the process and increase efficiency.

Membrane chlor-alkali process is an electrochemical process that produces chlorine and caustic soda by the electrolysis of brine. The production of chlorine and alkali is of enormous importance, as chlorine and caustic soda both are among the ten largest-volume chemical products in the world. Membrane chlor-alkali is seeing increased attention as mercury-based chlor-alkali systems are being phased out globally.

The membrane cell process is the most commonly used for new installations. It is far more efficient and environmentally friendly when compared to the alternatives (diaphragm or mercury cells), as it requires the least amount of energy and avoids environmental contamination associated with mercury or asbestos.