D301G
D301G is a macroporous weak base anion exchange resin bearing –N(CH₃)₂ groups. Its weak basicity allows easy regeneration and a working capacity about three times that of strong base resins, with good organic fouling resistance. Synthesized by a unique process, it has high mechanical strength and chemical stability. Synthesized by a unique process, it has special selectivity for gold cyanide complexes with fast adsorption kinetics and high loading capacity, and is mainly used in gold extraction.
Product Introduction
D301G is a macroporous weak base anion exchange resin bearing –N(CH₃)₂ groups. Its weak basicity allows easy regeneration and a working capacity about three times that of strong base resins, with good organic fouling resistance. Synthesized by a unique process, it has high mechanical strength and chemical stability. Synthesized by a unique process, it has special selectivity for gold cyanide complexes with fast adsorption kinetics and high loading capacity, and is mainly used in gold extraction.
Typical Physical & Chemical Properties
| Appearance | Milky white or light yellow opaque beads |
|---|---|
| Maximum regeneration capacity | ≥4.5mmol/g |
| Strong-base group capacity | ≤1.0mmol/g |
| Volumetric exchange capacity | ≥1.40mmol/ml |
| Moisture content | 48%~58% |
| True density (wet) | 1.03~1.06g/ml |
| Bulk density (wet) | 0.65~0.72g/ml |
| Particle size range | 0.7~1.6mm |
| Uniformity coefficient | ≤1.6 |
| Osmotic-attrition whole bead rate | ≥90% |
| Max. operating temperature | OH 40 °C, CL 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.