Ion exchange resins.

Ion exchange resins or polymers are the resins or polymer which act as a medium for ion exchange. For example Sodium polystyrene sulfonate.
Ion exchange is a reversible chemical reaction where the ions dissolve in a solution are removed and replaced by other ion of same electrical charge.
Ion exchange resins are normally in the form of small microbeads, usually white or yellowish in colour.

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The beads are typically porous.
Most of these resins are made of polystyrene sulfonate.

Polystyrene sulfonate.
Ion exchange resins consist of two main types namely cation exchange resins and anion exchange resins.
Cation exchange resins exchange positively charged ions.
Anion exchange resins exchange negatively charged ions.
Ion exchange resins are used for removal of calcium, magnesium, iron and manganese salts from water (water softening).
They are also used as an alternative to zeolites.
These resins are also used in biodiesel filtration process. Next

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Polymers

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