Firm Gel Strongly Basic
Styrene-based Anion Exchange Resin


202, aka 719 is a premium grade strongly basic anion exchange resin of the type II, with a clear gel structure. It has a highly firm structure, which empowers its excellent performance in machinery resistance, anti-osmotic and impact resistance. Also, for its special functional group -dimethylethanolamine, model 202 has a rather strong intensity and high exchange capacity. In addition to its main use in desalting system, it is also applied in wastewater treatment and separation of anionic metal complex compound, etc.

Matrix: Styrene-divinylbenzene copolymer
Functional groups: -(CH3)2NCH2CH2OH
Physical form: Milky white transparent spherical beads
Moisture holding capacity(%): 50 to 56%
Ionic form as shipped: Cl form
Strong group mass exchange capacity: ≥3.5mmol/g
Total bulk exchange capacity: ≥1.4mmol/mL
Moisture true density: 1.07~1.10g/mL
Moisture bulk density: 0.65~0.73g/mL
Effective particle size: 0.50~0.70mm
Particle size: 0.315~1.25mm
Uniformity coefficient: ≤1.5
Integrated beads ratio after grinding test: ≥90℅
Max swelling rate of resin after ionic state transition: Cl ->OH: 25%
Maximum operating temperature: 60°C
Minimum bed depth: 700mm
Service flow rate: 10~120 BV*/h
Maximum service velocity: 120 m/h
Regenerant: NaOH
Level(Counted by 100%): 60~150g/L
Concentration: 2~4℅
Flow rate: 2~8 BV*/h
Minimum contact time: 40min
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