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 (23)

Ion Exchange Resin (36)

Cation Exchange Resins (8)

Strong Acid Cation (5)

Gel (4)

Macroporous (1)

Weak Acid Cation (2)

Gel (1)

Macroporous (1)

Non Regenerable Cation (1)

  1. CSA 309

Anion Exchange Resins (11)

Strong Base Anion (7)

Gel (3)

Isoporus (2)

Macroporous (2)

Weak Base Anion (3)

Macroporous (3)

Non Regenerable Anion (1)

  1. GA 711

Mixed Bed Resins (1)

Uniform Particle Size (7)

Speciality Resins (9)

  1. DCHR 74
  2. DCHR 78
  3. DIRM 412
  4. DCR 11
  5. CWA 66D
  6. DMB-13 S
  7. CGC 1200
  8. CMC 1900
  9. CMC 2400

Water Treatment Chemicals (0)