Datasheet summary
DIAION WK10
PDF datasheet mirror for DIAION WK10 (Mitsubishi). Verify with OEM before design.
Summary
DIAION WK Series Weakly Cation Exchange Resins
This document describes DIAION WK Series weakly cation (WAC) exchange resins, which feature carboxylic acid groups (-COOH) as ion-exchangeable functional groups.
Resin Characteristics
- WAC resins can exchange cations from bases (e.g., NaOH) and salts of weak acids (e.g., NaHCO₃).
- Two types are available: polyacrylic acid type and polymethacrylic acid type.
- Polyacrylic acid type is suitable for use at pH > 4.
- Polymethacrylic acid type is suitable for use at pH > 5.
- WAC resins are easily regenerated to their H-form.
- They cannot split neutral salts like NaCl and Na₂SO₄ because carboxylic acid groups do not dissociate in acidic solutions.
Applications
- Polyacrylic acid type resins are widely used for treating hard water with high bicarbonate concentrations.
- When used in combination with strongly cation exchange resins (SACERs), WAC resins can help reduce total regenerants. This is because WAC resins can be regenerated using the regeneration effluent from SACERs.
Reactions
- Regeneration with NaOH: R-COOH + NaOH → R-COONa + H₂O (Eq. II-1)
- Exchange with NaHCO₃: R-COOH + NaHCO₃ → R-COONa + H₂O + CO₂ (Eq. II-2)
Disclaimer: Extraction may miss figures, footnotes, or revisions; contractual data must match the OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.