Ion exchange membrane
Now chlor alkali plants use membrane separation process for producing NaOH, Cl2 and H2. Ion exchange membrane is the core spare part of membrane separation process, with selective permeability. The ion exchange membrane is made from polymer material with selective permeability for ion, also called ion selective permeability membrane.
The following describes the major principles of ion exchange membrane chlor-alkali process.
In the ion exchange membrane process for producing caustic soda, permselective cation exchange membranes are installed between cathodes and anodes.
Electrolysis is carried out while brine is circulated in Anolyte Compartment, and caustic soda through Catholyte Compartment.