membraanirakus

Membraanirakus, also known as a membrane cell, is an electrochemical cell used in industrial processes, primarily for the production of chlorine and sodium hydroxide through the electrolysis of brine (a concentrated salt solution). This technology offers significant advantages over older methods like the mercury cell and diaphragm cell, particularly in terms of energy efficiency and environmental impact.

The core of a membrane cell is a semi-permeable ion-exchange membrane. This membrane selectively allows sodium ions (Na+) to pass through while preventing chloride ions (Cl-) and other impurities from reaching the cathode. The cell consists of an anode and a cathode separated by this membrane. In the anode compartment, chloride ions are oxidized to chlorine gas (Cl2). In the cathode compartment, water is reduced to hydrogen gas (H2) and hydroxide ions (OH-). The sodium ions that migrate through the membrane combine with the hydroxide ions to form sodium hydroxide (NaOH) in the cathode compartment.

The primary benefits of membraanirakus technology include its lower energy consumption compared to older methods, its ability to produce high-purity sodium hydroxide, and the elimination of hazardous mercury or asbestos used in other cell types. This makes it the preferred technology for modern chlor-alkali production due to its environmental sustainability and economic efficiency. The process requires careful control of temperature, current density, and brine purity to optimize performance and longevity of the membrane.