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330 Epoxy Weakly Alkaline Anion Exchange Resin


This is a kind of weakly alkaline anion exchange resin with primary amine, secondary amine, tertiary amine and quaternary amine groups [-NH₂、=NH、=N、=N-] in the epoxy chloropropane-polyethylene polyamine copolymer. It can be used as ion exchanger in acidic,neutral and alkaline mediums, with large exchange capacity and speedy exchange ability.

2.Typical Physical and Chemical Properties

Items Specification
Polymer Matrix Structure Epoxy
Physical Form and Appearance Golden yellow spherical particle
Ionic Form ,as shipped Free Base
Functional Groups -NH₂、=NH、=N、=N-
Total Capacity, wet, volumetric ≥2.1eq/l min
Moisture Retention, FB form 60-80%
Particle Size Range 0.3mm-1.2mm
< 0.3mm (max.) 1%
Uniformity Coefficient (max.) 1.6
effective size 0.4-0.7mm
Reversible Swelling FB –→CL- (max.) 30-40%
Shipping Weight (approx.) 650 -720g/l
Specific Gravity, moist CL- Form 1.10
pH Range, Stability 1-9

3.Suggested Operating Condition

Maximum Temperature:Free Base From 100°C (212°F) max.
Backwash Rate 50 to 75% Bed Expansion
Regenerant Concentration 2-4% NaOH
Regenerant dosage NaOH NaOh volume:resin volume = 3:1
Regenerant Flow Rate 2 to 4 BV/h
Regenerant contact Time At least 40 minutes
Service Flow Rate 10-25m/h


It is mainly used in water treatment to remove Cl- and SO₂-, removing inorganic acid, extracting organic acid and decolorization when refining the citric acid, streptomycin, malic acid, amino acid etc. and it also can be used in recycling of copper and silver ions.

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