DOWEX Resins for Separation of the Alkaline Earths from Liquid Media

The Alkaline Earths Beryllium - Be Magnesium - Mg Calcium - Ca Strontium - Sr Alkaline earths are di-valent cations and sorbed by strong acid cation resins.

Applications

Water / Wastewater: Removal of alkaline earth metals from water and organic solvents is fairly common using strong acid cation exchange resins. For waters with low levels of salt content, a strong acid cation resin such as DOWEX™ G-26 (H) resin would be a good starting point. Under alkaline conditions, a weak acid cation exchange resin such as DOWEX MAC-3 resin will provide higher capacity and easier regeneration.

Various cations have different affinities for strong acid cation exchange resins.

Brine Softening: Calcium, magnesium and strontium can be selectively removed from brine with an aminophosphonic acid chelating resin. For more information, please go to chelating / selective resins.

DOWEX Ion Exchange Resins

Product	Description	Type	Matrix	Total Exchange Capacity* eq/l (kgr/ft3)	Available Forms
DOWEX G-26 (H)	Uniform particle size strong acid cation exchange resin for specialty demineralization and catalyst applications.	Strong Acid Cation	Styrene-DVB, Gel	2.0	H+
DOWEX MAC-3	A macroporous weak acid cation exchange resin used for water softening, dealkalization, and demineralization applications.	Weak Acid Cation	Polyacrylic, Macroporous	3.8 (83.0)	H+