DIAION CR20

Summary

Product identification

• Grade Name: DIAION™ CR20
• Type: Chelating Resin
• Matrix: Styrene-DVB, Highly Porous
• Functional Group: Polyamine
• Ionic Form: Free Base
• Chemical Structure: CH₂=CH-CH₂NH(CH₂CH₂NH)nH

DIAION™ CR20 is a polyamine type chelating resin with high selectivity for divalent metal ions, especially transition metal elements, over monovalent ions. It is recommended for chemical process separations and for metals removal and recovery from wastewater.

Typical Properties

• Shipping Density: 640 g/L
• Mean Particle Size: 570 μm
• Particle Density: 1.05 g/mL
• Total Swelling (FB to Cl⁻): 10 %
• Whole Bead Count: 95 min. %
• Cu Adsorption Capacity: 0.4 mmol/mL (min.)
• Water Content: 50 - 60 %
• Particle Size Distribution on 1180 μm: 5 % max.
• Particle Size Distribution through 300 μm: 1 % max.
• Effective Size: 0.40 mm (min.)
• Uniformity Coefficient: 1.6 (max.)

The selectivity of DIAION™ CR20 toward metal ions is ranked as follows: Hg²⁺ > Fe³⁺ > Cu²⁺ > Zn²⁺ > Cd²⁺ > Ni²⁺ > Co²⁺ > Ag⁺ > Mn²⁺.

Recommended Operating Conditions

• Maximum Operating Temperature: 100 °C
• Effective pH Range: 2 - 6
• Minimum Bed Depth: 800 mm
• Service Flow Rate: 10 - 30 m/h

Regeneration

• Regenerant: HCl
• Regenerant Concentration: 4 - 10 % HCl
• Regenerant Level: 100 - 200 g/L
• Regenerant Flow Rate: 2 - 10 m/h
• Total Rinse Requirement: 10 - 20 BV

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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