CWA 63

Weak Acid Cation Exchange Resin

DOSHION CEA-63 is a GEL Type Weak Acid Cation Exchange Resin with high capacity. The resin is based on a polyacrylic, divinyl benzene matrix with carboxylic acid functional groups.
In water treatment applications, DOSHION CWA-63 is very effective in removing Ca++ and Mg++ at nearly 100% chemicals efficiency. Due to weak acid functionality, the resin removes temporary hardness (Calcium and Magnesium Associated with the water alkalinity) but not the permanent hardness (hardness associated with FMA)
The resin is supplied in hard moist bead from and is an excellent performer in de-alkalisation units.
PROPERTIES
Matrix Cross Linked Polystyrene
Functional group R-COOH, Carboxylic
Ionic Form H+ – Hydrogen
Physical Form Moist Opaque Beads
Particle Size (mm) 0.30 – 1.2
Molsture Content % 44-53
Total Exchange Capacity (eq/L) (min) 4.0
Specific Gravity gms/ml (About) 1.13
Bulk Density or Shopping Weight gms/ltr 740 – 760
Specific Gravity gms/ml (About) 5-14
Solubility in common solvents Insoluble
Effect of Acid & Alkali Unaffected
Operating Temperature °c (max) 120
Volume change % (max) :H+ – Na+  100
SUGGESTED OPERATING CONDITIONS
Minimum bed depth cm 75
Backwash Rate **m/hr See Fig.2
Regenerant Concentration % 0.5-0.8 (H2SO4)
1 – 5 (HCl)
Regenerant flow rate ^BV/hr 4-8
Regenerant contact time Minutes 30 -60
Regeneration Level 100% H2SO4 HCl m3 per m3 of Resin 115% of the operating capacity used
Displacement Rinse rate *BV/hr 4-8
Displacement Rinse volume *BV 1.5-2.0
Fast Rinse rate *BV/hr 10-20
Fast Rinse volume *BV 4-10
Service flow rate *BV/hr 5-40

*Bed Volumes/Hour **Bed Volumes

Sulphuric Acid concentration must be adjuste according to calcium content in the feed water

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