Union is an atom that has an electrical charge through the gain or loss of electrons. Those with a positive charge are called cations, while those with a negative charge are called anions.
These are some of the processes that use ion exchange:
- Water softener (elimination of hardness).
- De-alkalinization (remove carbonates).
- Demineralization (removal of all ions).
- Mixed bed (Nitrates and demineralization)..
- Elimination of metals.
The resins can be recognized by the following abbreviations: SAC (strong acid cation exchange resin), WAC (weak acid cation exchange resin), SBA (strong base anion exchange resin), AMB (strong base anion exchange resin).
Carrying out an independent separation of resins allows for better regeneration, so “it passes through the strong resin first, which requires an excess of regenerant, and the regenerant not consumed by the strong resin is generally sufficient to restore the resin. weak without additional dose. Cationic resins are regenerated with a strong acid, preferably hydrochloric acid HCl, H2SO4, because it can precipitate calcium”.
The ion exchange is carried out by means of a polymer in the form of tiny spheres that are capable of exchanging particular ions for other ions in a solution that passes through them, which are named “Ion exchange resins”. This exchange capacity is also observed in various natural systems, such as soils and living cells. Synthetic resins are not only used for water purification, but also for other applications that include the separation of some elements.
The main goal in water purification is to soften the water or remove mineral content. The water is softened by using a resin containing sodium cations (Na+), and exchanges them for calcium Ca2+ and magnesium Mg2+ (hardness): ion exchange.
To help you select your valves, pipes and accessories for these processes, come to TYSA’s specialist advisers and we will help you to train yourself. Contact us!