Ion Exchange Membrane

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Toray Group

Tokyo, Japan

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Cation exchange membranes (CEM), anion exchange membranes (AEM), and bipolar membranes make up the ion exchange membrane. The CEM blocks the anion from passing through the membrane, allowing only the cation to do so. To separate the two ions, the AEM operates in the same manner. Membrane capacitive deionization (mCDI), reverse electrodialysis (RED), electrodialysis (ED), and bipolar membrane electrodialysis (BPED) are the primary applications for the ion exchange membrane.
Compared to the reverse osmosis membrane system, the mCDI uses less electricity and has a higher recovery rate, making it more energy-efficient. Additionally, it is simpler to reject fluoride, which is somewhat difficult to reject in the reverse osmosis membrane system, and hardness, which causes scaling. Up to 60 degrees Celsius is the operating temperature. The thinnest, lowest electric resistance membrane, the most energy-efficient, and the ideal match for mCDI and RED is the 16um membrane.
The ED is a recycling application for concentration. Wastewater treatment is the most popular use for recycling the particular ions. A thick membrane works better for intense concentration. The 95um membrane is suitable for use with ED. Particularly for lithium manufacture and battery recycling, the BPED is a high-value technology. Additionally, they recycle wastewater containing sodium sulfate to make caustic soda. Because of its purity, effectiveness, and electric consumption, the bipolar membrane is the most crucial component of the BPED system.