An ion exchange process in which anions in solution are exchanged for other anions from an ion exchanger. In demineralisation for example, bicarbonate, chloride and sulphate anions are removed from so [..]

The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, positively charged phase, the latter being an anion exchanger. It takes place when Cl- is exchanged for OH- in desalting. The reaction is Cl- (in solution) + (OH- on anion exchanger+) → (Cl- on anion exchanger) + OH- (in solut [..]