Tri-bed Down-flow Deionization System Macroporous
Strong-Base Type II Styrene-based Anion Exchange Resin


D202TB is a premium grade macroporous strong-basic styrene-series anion exchange resin of type II functional group that links dimethylethanolamine, synthesized by advanced technology. Characterized by the high intensity of the polymerized matrix and solid structure of its chemosynthetic macropores, excellent regeneration efficiency as well as strong rinse performance, this resin is specialized in exchanging both strong and weak negative-polar organic anions &non-polar organic molecules as well as acids radicals of inorganic salts, with rather higher exchange capacity than equivalent model D201TB during operation.

Stacking by specific gravity of resin beds from light to heavy, D202TB often overlies on the very top for its lighter moisture true density while the heavy cation-bed is placed on the bottom. With adding extra inert-resin bed of medium density in between, altogether a three-layer bed water treatment system is fully configured to process water deionization &decolorization for pure water, ultrapure water and condensed water preparations per demand.

Likewise, for meeting diverse industrial needs, the inert-resin bed can also be interposed above D202TB and under a weak-base resin bed on the top as a reconfigured tribed water de-anionization &de-organics system, mainly taking effect in partial water demineralization, wastewater treatment such as the separation of anionic metallic complexes, heavy-metal pollutants, organic toxicants, inorganic minerals, etc. 
Thereby, D202TB has been widely applicable in a large variety of industries such as metallurgy, chemical engineering, electricity, electronics, semiconductors, food, cosmetics, medicine &pharmaceuticals, and the like.

Matrix: Styrene-divinylbenzene copolymer
Functional groups: -(CH3)2NCH2CH2OH
Physical form: Milky white opaque spherical beads
Moisture holding capacity(%): 50 to 56%
Ionic form as shipped: Cl form
Strong group exchange capacity: ≥3.85mmol/g
Total bulk exchange capacity: ≥1.25mmol/mL
Moisture true density: 1.07~1.10g/mL
Moisture bulk density: 0.65~0.73g/mL
Particle size: 0.4~0.9mm
Uniformity coefficient: ≤1.4
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: 10~20 BV/h
Maximum service velocity: 25m/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