Ion exchange resin water treatment agent

What is ion exchange resin (IX resin)

Ion exchange is a reversible chemical reaction where dissolved ions are removed from solution and replaced with other ions of the same or similar electrical charge. Not a chemical reactant in and of itself, IX resin is instead a physical medium that facilitates ion exchange reactions. The resin itself is composed of organic polymers that form a network of hydrocarbons. Throughout the polymer matrix are ion exchange sites, where so-called “functional groups” of either positively-charged ions (cations) or negatively-charged ions (anions) are affixed to the polymer network. These functional groups readily attract ions of an opposing charge.

Classification and types of ion exchange resins

1. According to the nature of exchange groups, they can be divided into two categories. The resin that exchanges with cations in solution is called a cation exchange resin. Its counter ions are hydrogen ions and metal ions; The resin that exchanges with the anion in the solution is called an anion exchange resin. The ionizable counter ions are hydroxyl ions and acid ions.

Like low molecular acids and alkalies, cation exchange resins can be divided into strong acidic and weak acidic type according to their ionization degree; Anion exchange resins are divided into strong alkaline and weak alkaline type.

2. Classify according to the hole type of ion exchange resin. Due to different preparation processes, different pore structures will be formed in the resin. The common products are gel ion exchange resin and macroporous ion exchange resin.

Keywords: Ion exchange resin, IX resin, cation exchange resin, anion exchange resin

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