An ion exchange resin is a resin that serves as an ion-exchange medium. It is a small insoluble matrix made from organic polymer substrates, generally in the shape of a tiny bead. This resin bead's surface is generally porous. This facilitates the easy trapping and release of ions. Ion exchange resins are employed in a variety of purification, separation, and decontamination procedures. Water filtration and softening are two common uses. In these procedures, ion exchange resins may be employed instead of zeolites. They are also quite successful in the filtering of biodiesel.
