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Technical Data Sheet

CHLORIDE-CYCLE DEALKALIZATION PROCESS

Introduction

 

Chloride-cycle dealkalization is an ion exchange-based process designed to remove alkalinity from pre-softened water (i.e., a reliable zeolite softening process is required upfront).  Strong Base Anion (SBA), Type II resin is used to provide ion exchange removal of the alkalinity (HCO3 and CO3). 

Strong acid salts, such as sulfate (SO4) ions and nitrate (NO3) ions will be removed via this ion exchange process as well.  The resin is regenerated with sodium chloride (NaCl) or with a combination of NaCl and sodium hydroxide (NaOH). Including a small amount of NaOH in the regeneration can significantly improve process efficiency.  Figure one illustrates the ion exchange process as it occurs in the system. 

For more, contact CSC Technology for a complete white paper.

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Updated: Wednesday, February 05, 2003