Ion exchange resin types
Strongly Acidic Cation Exchange Resins
—SO3– H+Sulphonic acid
|What they do||In sodium form, they remove hardness (essentially calcium and magnesium) from water and other solutions
In hydrogen form, they remove all cations
They are also used as acidic catalysts
(uniform)AmberjetTM 1000 Na
(uniform)DowexTM Marathon C
(uniform)LewatitTM Monoplus S100
(conventional)AmberliteTM IR120 Na
|Typical total capacity||1.9 to 2.2 eq/L [Na+]|
Weakly Acidic Cation Exchange Resins
|What they do||In hydrogen form, they remove preferentially divalent ions (e.g. calcium and magnesium) from solutions containing alkalinity|
|Typical total capacity||3.7 to 4.5 eq/L [H+]|
Strongly Basic Anion Exchange Resins
—N(CH3)3+ OH–Quaternary ammonium
|What they do||In hydroxyl form, they remove all anions
In chloride form, they remove nitrate, sulphate and several other ions
(uniform)AmberjetTM 4200 Cl
(uniform)DowexTM Marathon A
(uniform)LewatitTM Monoplus M500
(conventional)AmberliteTM IRA402 Cl
|Typical total capacity||1.0 to 1.5 eq/L [Cl–]|
Weakly Basic Anion Exchange Resins
|What they do||After cation exchange, they remove chloride, sulphate, nitrate, and other anions of strong acids, but they do not remove weak acids (SiO2 and CO2)|
DowexTM Marathon MWA
LewatitTM Monoplus MP64
|Typical total capacity||1.1 to 1.7 eq/L [free base]|
Selective and chelating resins
|Functional groups||Many different types|
|What they do||They remove metals, boric acid, perchlorate or other ions selectively|
|See details in||Resin structure.|
- Laboratory photographs of various resins.
- Structure of the matrix and functional groups of ion exchange resins.
- All ion exchange resins in the World!
- Resin properties
- Selectivity tables for cation and anion exchange resins.
- Ion exchange capacity
Amberjet, Amberlite, Ambersep, and Dowex are trademarks of the Dow Chemical Company.
Lewatit is a trademark of Lanxess.