CH530
CH530 is a macroporous polystyrene chelating resin with isothiouronium groups, non-regenerable type. Main applications: mercury removal, precious-metal recovery and gold recovery. Suitable media: acidic leach liquors and pulps.
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Product Introduction
CH530 is a macroporous polystyrene chelating resin with isothiouronium groups, non-regenerable type. Main applications: mercury removal, precious-metal recovery and gold recovery. Suitable media: acidic leach liquors and pulps.
Typical Physical & Chemical Properties
| Polymer matrix | Macroporous polystyrene crosslinked with divinylbenzene |
|---|---|
| Appearance | Spherical granules |
| Functional group | Isothiouronium |
| Ionic form | H+ form |
| Hg exchange capacity (min) | 275 g/L |
| Water retention | 48–54 % (H+ form) |
| Particle size distribution | 300 - 1200 µm |
| < 300 µm (max) | 1 % |
| Uniformity coefficient (max) | 1.7 |
| Swelling, H+ → Hg (max) | 5 % |
| Specific gravity | 1.11 |
| Packaging density (approx.) | 700 - 735 g/L (43.8 - 45.9 lb/ft³) |
| Operating temperature range | 60 °C (140.0 °F) |
| pH range (in operation) | 0 - 7 |
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.