Macroporous Styrene-based
Ion Exchange Resin of Chelating Type


D403 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 in chlor-alkali industry and electrophoretic refining, particularly being widely applied in removing heavy metallic divalent nickel ions((Ni2+) within wastewater treatment.

Matrix: Styrene-divinylbenzene
Functional groups: -N+(CH2COO) 2
Physical form: Off-white opaque spherical beads
Moisture holding capacity(%): 55 to 60%
Ionic form as shipped: Na+ form
Chelating nickel(Ni2+) ion adsorption capacity: ≥37g/l
Total bulk exchange capacity: ≥1.98mmol/ml
Moisture true density: 1.14~1.19g/ml
Moisture bulk density: 0.69~0.79g/ml
Effective particle size: 0.40~0.60mm
Particle size: 0.315~1.25mm
Uniformity coefficient: ≤1.6
Integrated beads ratio after grinding test: ≥95%
Maximum swelling rate of resin after ionic state transition: H+->Na+≤40%
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