Water Softner Resin
Ion exchange resins are polymers that are capable of exchanging particular ions within the polymer with ions in a solution that is passed through them. In water purification the aim is usually either to soften the water or to remove the mineral content altogether. Ion exchange resins are classified as cation exchangers, which have positively charged mobile ions available for exchange, and anion exchangers, whose exchangeable ions are negatively charged. Both anion and cation resins are produced from the same basic organic polymers. They differ in the ionizable group attached to the hydrocarbon network. It is this functional group that determines the chemical behavior of the resin. Resins can be broadly classified as strong or weak acid cation exchangers or strong or weak base anion exchangers.