D113 Macroporous Weak Acid Cation Exchange Resin (For Salt Lake Lithium Extraction)

Product Overview

D113 is a premium-grade macroporous weakly acidic cation exchange resin with carboxylic acid functional groups (-COOH) on a crosslinked acrylic copolymer matrix. It is supplied in hydrogen (H⁺) form as moist, uniform, spherical beads, featuring high exchange capacity, excellent mechanical strength, good chemical stability, fast ion exchange kinetics, and low volume change during conversion. It is widely used in salt lake brine lithium extraction for pre-purification (removing Ca²⁺, Mg²⁺, and other divalent cations) and auxiliary lithium enrichment, matching international equivalents: Amberlite IRC-93, Lewatit CN-80, Purolite C104E.

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D113 Macroporous Weak Acid Cation Exchange Resin (For Salt Lake Lithium Extraction)

Core Physical & Chemical Properties

Parameter	Specification
Polymer Matrix	Acrylic crosslinked with divinylbenzene (DVB)
Appearance	Milky white/light yellow opaque spherical beads
Functional Group	Carboxylic acid (-COOH)
Shipping Form	Hydrogen (H⁺) form
Total Exchange Capacity (wet, H⁺ form)	≥ 4.2 eq/L (≥ 1000 mmol/L at 25°C)
Working Exchange Capacity	≥ 1600 mmol/L (wet)
Moisture Content (H⁺ form)	45–55%
Particle Size	0.315–1.25 mm (≥ 95% whole beads)
pH Range	4–14
Max Operating Temperature (H⁺ form)	≤ 100°C
Swelling Rate (H⁺→Na⁺)	≤ 70%
Mechanical Strength	≥ 95% (bead integrity)

Key Advantages for Salt Lake Lithium Extraction

High Selectivity for Divalent Cations

Strong affinity for Ca²⁺, Mg²⁺, and other divalent impurities in salt lake brine, effectively reducing the Mg/Li ratio and creating favorable conditions for subsequent lithium adsorption/extraction.
High Exchange & Regeneration Efficiency

Large working exchange capacity; near100% regeneration efficiency with dilute acid (HCl/H₂SO₄), lowering chemical consumption and operating costs.
Excellent Physical & Chemical Stability

Resistant to brine corrosion, oxidation, and fouling; long service life, suitable for continuous saltlake brine processing.
Fast Kinetics & Low Pressure Drop

Macroporous structure enables rapid ion diffusion; uniform bead size ensures low bed resistance and stable flow in ionexchange columns.
Flexible Application Forms

Available in H⁺ (standard) and Na⁺ forms; compatible with fixedbed, floatingbed, and dualbed systems for brine pretreatment.

Applications in Salt Lake Lithium Extraction

Brine Pre-Purification:

Primary removal of Ca²⁺, Mg²⁺, and heavy metal cations to protect downstream lithiumselective resins/adsorbents and improve lithium purity.

Auxiliary Lithium Enrichment:

Synergistic use with lithium-specific chelating resins (e.g., D401-II, RTL-91) to enhance total lithium recovery from low-grade brines.

Brine Dealkalization:

Removes bicarbonates/carbonates, adjusting brine pH to optimize lithium adsorption efficiency.

Wastewater Recycling:

Recovers lithium from process effluents, reducing resource loss and environmental impact.

Operating Guidelines for Salt Lake Brine

1. Pre-Treatment: Filter brine to remove suspended solids (≤ 1 μm) to prevent resin pore blockage.

2. Adsorption: Flow rate = 4–6 BV/h (bed volume/hour); optimal pH = 6–9; run until Ca/Mg breakthrough.

3. Regeneration: Use 3–5% HCl or H₂SO₄; flow rate = 2–4 BV/h; contact time = 30–50 min; regenerant dosage = 120–150% of theoretical capacity.

4. Rinsing: Fast rinse with demineralized water (6–8 BV) to remove residual acid; slow rinse until effluent pH = 5–7.

5. Storage: Keep moist; temperature ≥ 0°C; avoid freezing and direct sunlight.

Packaging & Storage

· Packaging: 25 kg/drum (PE lined) or 1000 L IBC tote.

· Storage: Cool, dry, ventilated area; avoid contact with strong oxidants.

· Shelf Life: 2 years (unopened, proper storage).

Notes

· D113 is a pre-purification resin for salt-lake lithium extraction, not a lithium-selective adsorbent. It is typically used in series with lithium-specific resins to achieve high-purity lithium recovery.

· Optimize operating parameters (flow rate, regenerant concentration, pH) based on actual brine composition (Mg/Li ratio, salinity) for best performance.