D113SC
D113SC is a macroporous weak acid cation exchange resin bearing carboxylic acid groups (–COOH) on a macroporous acrylic copolymer. It is mainly used in industrial water treatment — especially for removing carbonates, bicarbonates and other alkaline salts — and also for zinc and nickel wastewater treatment and recovery and for separation and purification of biochemical pharmaceuticals. D113SC is suitable for double-bed systems.
Product Introduction
D113SC is a macroporous weak acid cation exchange resin bearing carboxylic acid groups (–COOH) on a macroporous acrylic copolymer. It is mainly used in industrial water treatment — especially for removing carbonates, bicarbonates and other alkaline salts — and also for zinc and nickel wastewater treatment and recovery and for separation and purification of biochemical pharmaceuticals. D113SC is suitable for double-bed systems.
Typical Physical & Chemical Properties
| Appearance | Milky white or light yellow opaque beads |
|---|---|
| Shipped form | H+ |
| Total exchange capacity | ≥10.8mmol/g |
| Volumetric exchange capacity | ≥4.4mmol/ml |
| Moisture content | 45%~52% |
| True density (wet) | 1.14~1.20g/ml |
| Bulk density (wet) | 0.72~0.80g/ml |
| Particle size range | 0.315~0.63mm |
| Effective particle size | 0.35-0.50mm |
| Uniformity coefficient | ≤1.4 |
| Osmotic-attrition whole bead rate | ≥95% |
| Swelling on conversion (H+ → Na+) (max) | ≤70% |
| H-form ratio | ≥98% |
| Max. operating temperature | 100 °C |
| Resin bed height | 1~3m |
| Service flow rate | 2~10BV/h |
| Backwash flow rate | 4~10BV/h |
| Regeneration (elution) flow rate | 1~2BV/h |
| Regenerant dosage | 2 BV 3~5% HCl, 2 BV 2~4% NaOH |
Handling, Storage & Loading Notes
- Transport & storage. Store the resin in its wet state, preferably above 0 °C. For long idle periods, keep the container closed or add brine of ≥5% NaCl. Protect from freezing during transport, and do not stack heavy objects on top of the resin to avoid crushing the beads.
- Pre-treatment. For general requirements, one alkaline → water → acid → water cycle is sufficient; for strict requirements, perform three cycles and finish with the required ionic form.
- Loading. Allow for the swelling on form conversion and leave enough freeboard to prevent overflow while keeping a proper liquid level. Keep the column aspect ratio in a reasonable range to avoid channeling. Load wet or backwash to remove air bubbles from the bed.
- Feed quality. Before entering the resin column, the liquid should be coagulated, filtered or sand-filtered to ensure it is free of suspended solids that could clog the resin pores.
- Idle columns. Resin left idle in a column for a long time must be washed out and stored clean, or kept submerged in brine; it must never dehydrate. Backwash from time to time to loosen the bed and prevent caking.