Weak acid cation resin is used as a single resin for dealkalization in the H cycle and for brackish water softening in Na cycle. In demineralization, the use of a weak acid cation in front of a strong cation is preferred with feed waters containing a high proportion of temporary hardness (>40%) and low Free Mineral Acid (FMA). This configuration has advantages in terms of regeneration efficiency and operating capacity.
With sulfuric acid regeneration, two separate cation columns should be used in order to allow acid dilution at the weak acid resin inlet. For counter-flow regenerations, a double compartment layered bed cation including a facility for acid dilution at the weak acid cation inlet can be used, but is more complex to operate. DOWEX™ MAC-3 resin or DOWEX UPCORE™ MAC-3 resin are ideal choices for UPCORE system plants.
| Product | Description | Matrix | Total Exchange Capacity eq/L (kgr/ft3) |
Available Forms |
| DOWEX™ MAC-3 | A macroporous weak acid cation exchange resin used for water softening, dealkalization, and demineralization applications. | Polyacrylic, Macroporous | 3.8 (83.0) | H+ |
| AMBERLITE™ IRC76 | A polymer based weak acid ion exchange and chelating resins for use in metal removal from aqueous solutions. | Macroreticular | ≥ 3.90 | H+ |
| AMBERLITE IRC747 | A polymer based weak acid ion exchange and chelating resins for use in removal of hardness from brine. | Macroreticular | ≥ 1.75 | Na+ |
| AMBERLITE IRC748 | A polymer based weak acid ion exchange and chelating resins for heavy metals removal. | Macroreticular | ≥ 1.35 | Na+ |
| AMBERLITE IRC86 | A high capacity, weak acid cation exchange resin. | Gel | ≥ 4.10 (H+ form) | H+ |
| AMBERLITE IRC86RF | A high capacity weak acid cation exchange resin containing carboxylic acid groups. | Gel | ≥ 4.10 (H+ form) | H+ |
| AMBERLITE IRC86SB | A high capacity, weak acid cation exchange resin. | Gel | ≥ 4.10 (H+ form) | H+ |
| AMBERLITE IRP64 | An insoluble, weakly acidic, hydrogen form cation exchange resin for use in pharmaceutical applications. | - | - | H+ |
| AMBERSEP™ GT74 | A polymer based weak acid ion exchange and chelating resins. | Macroreticular | ≥ 1.30 (SH form) | H+ |
| IMAC® HP336 | A weak acid cation resin exchang resin containing carboxylic groups on an acrylic matrix. | Polyacrylic | ≥ 3.90 | H+ |
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