DCHR 74

Macroporous Strong Base Anion Resin

DOSHION DCHR 74 resin is a macroporous strong base anion exchange resin which is specially designed for the removal of nitrates from water for potable processes. The macroporous matrix and special ion exchange group functionality imparts ideal nitrate selectivity to DCHR 74 making this resin particularly suitable for nitrate removal even when moderate to high concentrations of Sulphate are present. Hence this resin gives superior performance in nitrate removal applications when compared with standard exchange resins.
The Characteristics of DCHR 74 :
• Ideal for removal of Nitrates from water for Potable processes.
PROPERTIES
Matrix Cross linked Polystyrene Macroporous
Functional group Special Nitrate Selective
Ionic Form  Cl – Chloride
 Physical Form Opaque Cream Spherical Beads
Particle size (mm) 0.3- 1.2
 Uniformity Coefficient (max) 1.7
 Moisture Content, CI form % 50-56
Total Exchange Capacity (eq/L) (min) 0.9
Bulk Density / Shipping Weight (gm/L) 675-705
 Operating Temperature °C, CI- form (max) 100
 Reversible Swelling CISO42/NO3; Negligible
Solubility in common solvents Insoluble
SUGGESTED OPERATING CONDITIONS
Minimum Bed Depth cm 75
 Operating pH  4.5 – 8.5
Regenerant Concentration % 3-10(NaCl)
Regenerant Flow Rate *BV/hr 2 – 6
Regenerant Contact Time Minutes 30
Regeneration Level Kg per m3 of Resin 90-250 (NaCl)
Displacement Rinse Rate *BV/hr 2 – 5
Displacement Rinse Volume #BV 2 – 5
Fast Rinse Rate *BV/hr 8 – 32
Fast Rinse volume #BV 4 – 10
Service flow rate *BV/hr 8 – 32

* Bed Volumes/Hour  #Bed Volumes

Pharma Polymer (20)

Active Pharmaceutical Ingredients (API) (4)

Taste Masking Agents (7)

Tablet Disintegrating Agents (3)

Nicotine Taste Masking (1)

Separation of Aminoacids, Enzymes & Alkloids (1)

Purification of Vitamin C (1)

Stabilization of Vitamin B12 (1)

Sustain/Control release (2)

Ion Exchange Resin (53)

Softening Resins (5)

Demineralisation Resins (22)

Condensate Polishing /TPS Resins (7)

Catalytic Resins (2)

Super Charged Resins (2)

Decolor / De Ashing Resins (7)

Nuclear Grade Resins (2)

Color Removal & COD Reduction Resins (1)

Special Application Resins (5)

  1. DIRM 412
  2. CWA 66D
  3. CWA 92D
  4. DCHR 74
  5. DCHR 78