201×8
Lijiang 201×8 is a gel-type strong base (Type I) anion exchange resin on a polystyrene-divinylbenzene matrix, bearing quaternary ammonium groups –N(CH₃)₃ — the solid equivalent of a strong base. High total exchange capacity and good mechanical strength. Mainly used for pure water production, wastewater treatment, biochemical products, and extraction of gold, silver, tungsten and molybdenum in hydrometallurgy.
Product Introduction
Lijiang 201×8 is a gel-type strong base (Type I) anion exchange resin on a polystyrene-divinylbenzene matrix, bearing quaternary ammonium groups –N(CH₃)₃ — the solid equivalent of a strong base. High total exchange capacity and good mechanical strength. Mainly used for pure water production, wastewater treatment, biochemical products, and extraction of gold, silver, tungsten and molybdenum in hydrometallurgy.
International Equivalents
Amberlite IRA-400, AB-17, Diaion SA-10A
Typical Physical & Chemical Properties
| Appearance | White to pale yellow translucent beads |
|---|---|
| Total exchange capacity | ≥3.8mmol/g |
| Volumetric exchange capacity | ≥1.5mmol/ml |
| Moisture content | 43%~47% |
| True density (wet) | 1.06~1.10g/ml |
| Bulk density (wet) | 0.66~0.71g/ml |
| Particle size range | 0.315~1.25mm |
| Effective particle size | 0.40-0.70mm |
| Uniformity coefficient | ≤1.6 |
| Osmotic-attrition whole bead rate | ≥60% |
| Max. operating temperature | OH40 °C, CI100 °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.