LJ087
LJ087-2 is a mixed-bed resin composed of electronic-grade gel-type cation and anion resins, suitable for the production and polishing of ultrapure water in the electronics industry. It yields high-purity, silica-free demineralized water with high exchange capacity and excellent abrasion resistance.
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Product Introduction
LJ087-2 is a mixed-bed resin composed of electronic-grade gel-type cation and anion resins, suitable for the production and polishing of ultrapure water in the electronics industry. It yields high-purity, silica-free demineralized water with high exchange capacity and excellent abrasion resistance.
Typical Physical & Chemical Properties
| Functional group | -SO3H | -N(CH3)3 |
|---|---|---|
| Shipped form | H+ | OH- |
| Cation : anion ratio (V/V) | 1 | 1.5 |
| Volumetric exchange capacity | ≥1.8mmol/ml | ≥1.10mmol/ml |
| Moisture content | 48%~55% | 53%~58% |
| True density (wet) | 1.18~1.24g/ml | 1.06~1.09g/ml |
| Bulk density (wet) | 0.74~0.82g/ml | 0.66~0.71g/ml |
| Particle size range | 0.315~1.25mm | 0.315~1.25mm |
| Effective particle size | 0.40-0.70mm | 0.40-0.70mm |
| Uniformity coefficient | ≤1.6 | ≤1.6 |
| Osmotic-attrition whole bead rate | ≥60% | ≥60% |
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.