Dual-bed Gel Strongly Basic
Styrene Series Anion Exchange Resin


201X7DB, aka 717DB is a premium grade gel-structured strong-basic styrene-based anion exchange resin of the type I, containing trimethylamine functional groups, synthesized by special technology. Characterized by its high granular intensity and complete integrity, excellent regeneration efficiency as well as good rinse performance, this resin is specialized in removing all the anions such as chloride ions or ‘acid root anions’ of those salts as in ‘carbonate, silicate, sulfate, nitrate, hydrochloride, etc’ within the impurity liquids. This resin model is primarily used in precise anionic bunk-bed water treatment system for ultrapure water preparation within various industries.

Matrix: Styrene-divinylbenzene copolymer
Functional groups: -N+ (CH3 )3
Physical form: Light yellow transparent spherical beads
Moisture holding capacity(%): 46 to 54%
Ionic form as shipped: Cl form
Total mass exchange capacity: ≥3.8mmol/g
Total bulk exchange capacity: ≥1.3mmol/mL
Moisture true density: 1.07~1.10g/mL
Moisture bulk density: 0.67~0.73g/mL
Particle size: 0.63~1.25mm
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: 5~25 BV*/h
Maximum service velocity: 40 m/h
Regenerant: NaOH
Level(Counted by 100%): 60~100g/L
Concentration: 2~4℅
Flow rate: 2~8 BV*/h
Minimum contact time: 40min
Slow rinse: 5~8 BV at regeneration flow rate
Fast rinse: 10~20 BV at service flow rate
*1 BV(Bed Volume)= 1 solution per resin