DIAION WA21J

Summary

Product identification

• Grade Name: DIAION™ WA21J
• Type: Weak Base Anion
• Matrix: Styrene-DVB, Porous
• Functional Group: Polyamine
• Ionic Form: Free Base

DIAION™ WA21J is a polyamine type weakly basic anion exchange resin with high total anion exchange capacity, excellent regeneration efficiency, and mechanical strength. It is recommended for removing strong mineral acids from water.

Typical Properties

• Shipping Density: 650 g/L
• Mean Particle Size: 610 μm
• Particle Density: 1.07 g/mL
• Total Swelling (FB to Cl⁻): 23 %
• Water Content: 40 - 52 %
• Whole Bead Count: 95 % min.
• Total Exchange Capacity: 2.0 meq/mL min.
• Particle Size Distribution on 1180 μm: 5 % max.
• Particle Size Distribution thr. 300 μm: 1 % max.
• Effective Size: 0.40 mm min.
• Uniformity Coefficient: 1.6 max.

Recommended Operating Conditions

• Maximum Operating Temperature: 100 °C
• Operating pH Range: 0 - 9
• Minimum Bed Depth: 800 mm
• Service Flow Rate: 10 - 40 m/h

Regenerant

• Regenerant: NaOH
• Regenerant Concentration: 1 - 4 % NaOH
• Regenerant Level: 120 % of ionic load
• Regenerant Flow Rate: 2 - 6 m/h
• Total Rinse Requirement: 5 - 10 BV

Hydraulic Characteristics

Pressure drop for DIAION™ WA21J resin is shown in graphs in the official PDF for various temperatures and flow rates per meter of bed depth during normal downflow operation.

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror