Dowex™ Marathon™ C strong acid cation exchange resin is a uniform particle size and gel type resin designed by Dow Chemical Corporation (USA) for application in domestic, commercial and industrial water softening systems.
The resin’s distinctive feature is represented by the uniform distribution of its beads according to their sizes to provide excellent kinetic behavior. It exhibits good physical, chemical and thermal stability.
uniform size beads exercise good kinetic behavior, leading to longer filter runs
uniformity of distribution of the beads according to sizes provides a better quality of purified water compared to standard ion-exchange resins
kinetic acceleration of ion exchange increases regeneration efficiency and dynamic exchange capacity
low volume of regenerating solution and wastewater
effective operation for more than 5 years
During filtration of water through the cation exchange resin the hardness ions Ca2+ and Mg2+ are replaced by Na+ ions.
The replacement of calcium and magnesium ions by sodium ion prevents scale formation on the heating surfaces of boilers and heat exchangers. As water passes through the cation exchange resin, a number of sodium ions able to perform the exchange decreases, and a number of calcium and magnesium ions retained on the resin increases, so the cation exchange resin is being exhausted. That is why it should be regenerated by passing the solution of sodium chloride through the cation exchange layer, which will result in restoration of the resin’s exchange capability.