Demineralisation Plant are contained inside synthetic ion exchange resins. By passing the solution through columns of cation and anion exchange resin, all the ions can be exchanged, leaving only hydrogen and hydroxyl, which combine, leaving pure water. Alternatively, by suitable choice of ion exchange resin, only a portion of the ions can be selectively removed.

Demineralisation Plant are contained inside synthetic ion exchange resins. By passing the solution through columns of cation and anion exchange resin, all the ions can be exchanged, leaving only hydrogen and hydroxyl, which combine, leaving pure water. Alternatively, by suitable choice of ion exchange resin, only a portion of the ions can be selectively removed.