Macroporous Styrene-based
Ion Exchange Resin of Chelating Type


D401 is a macroporous styrene-based ion exchange resin with an iminodiacetic acid as the chelating functional group. Within the solutions where multi-valences of metallic ions exist, it only binds to the metallic ions whose valences are greater than or equal to divalence to form stable complexes. It is mainly used for strong brine softening and electrophoretic refining, particularly being widely applied in removing heavy metallic divalent copper ions within wastewater treatment. And it is specialized in selective removal of calcium and magnesium impurities in salt solution which is prepared for alkali production by ionic membrane method in chlor-alkali industries.

Matrix: Styrene-divinylbenzene copolymer
Functional groups: -CH2-N-(CH2COOH)2
Physical form: Griege opaque spherical beads
Moisture holding capacity(%): 55 to 65%
Ionic form as shipped: Na+ form
Selective ion adsorption capacity: ≥40g/l (Cu2+)
Total bulk exchange capacity: ≥2.0mmol/ml
Moisture true density: 1.15~1.20g/mL
Moisture bulk density: 0.70~0.80g/mL
Particle size: 0.45~1.25mm
Maximum swelling rate after ion state transition: Na+ ->H+≤40%
Applicable PH range: 3~12
Maximum operating temperature: 100°C
Minimum bed depth: 800mm
Service flow rate: 5~40 BV*/h
Maximum service velocity: 60 m/h
Regenerant: HCl H2SO4
Level(Counted by 100%): 50-100g/L 70~150g/L
Concentration: 4~8℅10~30℅
Flow rate: 1~3 BV*/h0.5~2 BV*/h
Minimum contact time: 30min30min
Slow rinse: 2 BV at regeneration flow rate
Fast rinse: 4~8 BV at service flow rate
*1 BV(Bed Volume)= 1 solution per resin