cation-exchange resin

chemistry

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June 24, 2026

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A cation-exchange resin is a type of ion-exchange resin that contains acidic groups. These acidic groups allow the resin to attract and exchange positively charged ions, known as cations, from a surrounding solution.12

These resins are typically made from polymerized organic compounds, often a styrene-divinylbenzene copolymer, with electrically charged groups like sulfonic or carboxylic acid salts. They are usually prepared as granules or beads and absorb solutions, causing them to swell.2

Cation-exchange resins are used in various applications, including water softening to remove calcium and magnesium ions, purification of sugar, and recovery of valuable elements like uranium from ores. They can also act as catalysts in certain chemical reactions.23

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separation and purification
Chromatography
In a cation-exchange resin all the sites are negatively charged, so that only positive ions can be separated; an anion-exchange resin has positively charged sites. Ion-exchange chromatography has become one of the most important methods for separating proteins and small oligonucleotides.
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In a cation-exchange resin all the sites are negatively charged, so that only positive ions can be separated; an anion-exchange resin has positively charged sites. Ion-exchange chromatography has become one of the most important methods for separating proteins and small oligonucleotides.
Read More

ion-exchange resin
Electron-exchange resins accept or donate electrons to the surrounding solution and are used in oxidation-reduction reactions; examples include polymers prepared from hydroquinone, phenol, and formaldehyde.
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Electron-exchange resins accept or donate electrons to the surrounding solution and are used in oxidation-reduction reactions; examples include polymers prepared from hydroquinone, phenol, and formaldehyde.
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