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201×7 Strong Base Anion Exchange Resin


201×7 is a clear gel Type 1 strong-base anion exchanger with both high operating capacity and the ability to achieve low residual silica levels. It has a clear gel structure, showing excellent regeneration efficiency and rinse characteristics.

2.Typical Physical and Chemical Properties

Items Specification
Polymer Matrix Structure Crosslinked Polystyrene Divinylbenzene
Physical Form and Appearance White color Spherical beads
Functional Groups [-N(CH₃)₃OH]
Ionic Form ,as shipped CL-
Total Capacity, CL- form, wet, volumetric ≥1.35eq/l min
Moisture Retention, CL-form 42-48%
Particle Size Range 0.45mm-1.25mm
< 0.45mm (max.) 2%
Uniformity Coefficient (max.) 1.6
effective size > 0.5mm
Reversible Swelling CL-→ OH–(max.) 18-25%
Shipping Weight (approx.) 670 -730g/l
Specific Gravity, moist CL- Form 1.09
pH Range, Stability 0 - 14

3.Suggested Operating Condition

Maximum Temperature Oh-Form 60 °C (140°F) max.
CL-Form 80 °C (176°F) max
Backwash Rate 50 to 75% Bed Expansion
Regenerant Concentration 2-4% NaOH
Regenerant dosage NaOH NaOh volume:resin volume = 3:1
Regenerant Flow Rate 2 to 4 BV/h
Regenerant contact Time At least 40 minutes
Service Flow Rate 10-25m/h


It is mainly used in pure water and high purity water manufacturing, extraction and decolorization of biochemical products, wastewater treatment, separation of organics, extraction of radioelements, extracting the tungsten and molybdenum in hydrometallurgy etc

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