Strong Acid Cation Exchange Resin
Packing: bag
MOQ: 1 ton
Acidity and alkalinity: Acidic ion exchange resin
Particle size: 0.5-1.2mm
Solubility: Insoluble in water
Application: Water treatment
Strong Acid Cation Exchange Resins are generally sodium-type or hydrogen-type strong acid exchange resins with a macroporous structure. Unlike weakly acidic resins, strongly acidic resins can undergo displacement reactions with heavy metal ions in water. Therefore, they are not only used in water treatment but also in metal recycling, pharmaceuticals, sugar, and petroleum industries. The application range is relatively wide.
Strongly acidic cationic resins have sulfonic acid as a functional group. They can work at any pH value (0-14) and withstand high temperatures (up to 120°C).
However, it should be noted that strongly acidic resin requires a large amount of regenerant (15% more regenerant than weak acid resins) to complete regeneration, which means that its regeneration cost will be more expensive than that of weakly acidic resins. In actual use, it should be selected reasonably according to needs. (See the FAQ below for details)
Technical parameter
| Product name | Strong Acid Cation Exchange Resin |
| Particle size | 0.5-1.2 mm |
| Water content | 50%-60% |
| Total exchange capacity | ≥4.8 MMOL/G |
| Volume exchange capacity | ＞1.8 MMOL/ML |
| Wet Apparent Density | 0.74-0.8 G/ML |
| Wet True Density | 1.16-1.24 G/ML |
| Uniformity coefficient | ≤1.6 |
| Chemical stability | Insoluble in water |
| Storage temperature | 5-40℃ |
| Maximum operating temperature | 120℃ |
| Application | Wastewater treatment and industrial water treatment |
Key parameter description
| Parameter | Value | Application/Advantage |
|---|---|---|
| Total Exchange Capacity | ≥4.8mmol/g | Adsorbs more heavy metal ions (e.g., copper, nickel) per gram, ideal for high-concentration wastewater (electroplating, dyeing) |
| Maximum Operating Temperature | 120℃ | Handles high-temperature industrial wastewater (boiler blowdown, chemical cooling water) without pre-cooling, reducing energy use |
| pH Range | 0-14 | Stable performance in extreme acidity (pH 2 mine wastewater) or alkalinity (pH 12 paper mill wastewater) |
| Exchange Rate (vs. Weak Acid) | 40% Faster | Processes 50m³/h per m³ resin vs. 35m³/h for weak acid resins, suitable for continuous production demands |
Features of Strong Acid Cation Exchange Resin: (compared with weak acid resin)
Stronger acid dissociation ability
Functional groups on strongly acidic resins have higher acid dissociation constants and therefore can adsorb and release cations more effectively under acidic conditions. This is important for some applications that require ion exchange in acidic environments.
pH Range
Strong acid resins operate effectively in a lower pH range than weak acid resins. If the pH number of raw water is below 6.0, the weak acid resin will not be very efficient.
Faster Ion Exchange Rates
Strongly acidic resins typically have faster ion exchange rates due to stronger functional groups. This means that within the same amount of time, strongly acidic resins can complete the ion adsorption and release processes faster.
Wider application range
Strong acid resins are suitable for a wider range of applications. They can be used in processes requiring efficient ion exchange in water treatment, food processing, pharmaceuticals, chemical industries, and other fields.
Real Case: Application in a Dyeing Factory's Wastewater Treatment
A dyeing factory in Zhejiang, China, faced challenges with heavy metal ions (copper, nickel) in its production wastewater (pH 4.5-5.5). Initially, using weak acid cation exchange resins, they encountered two issues:
❌ Only 30% efficiency in acidic conditions (weak acid resins perform poorly at pH < 6);
❌ Frequent downtime for regeneration, limiting monthly treatment capacity to 800 tons.
After switching to our strong acid cation exchange resin (total exchange capacity ≥4.8mmol/g, pH 0-14 compatibility):
✅ Efficiency in acidic water rose to 85% (strong acid resins have stronger acid dissociation, enabling better cation adsorption);
✅ 40% faster exchange rate vs. weak acid resins, increasing monthly treatment capacity to 1,200 tons;
✅ Despite 15% higher regeneration costs, overall operational time reduced by 30%, saving ~$2,800/month in labor and energy costs.
Frequently Asked Questions
Is strong acid cation exchange resin suitable for acidic raw water?
A: Absolutely! Strong acid resins' sulfonic acid functional groups have strong acid dissociation, working stably across pH 0-14. For raw water with pH < 6 (e.g., mine acidic wastewater, electroplating pickling solution), weak acid resins drop to 30-40% efficiency, while strong acid resins maintain >80% performance.
Will higher regeneration costs affect long-term use?
A: It depends on the scenario. For high-concentration heavy metals or continuous processing (e.g., dyeing, chemical plants), strong acid resins' 40% faster exchange rate reduces regeneration frequency, saving labor and energy. For 500 tons/day wastewater, strong acid resins regenerate 3 times/month vs. 5 times for weak acid resins-lowering total operational costs.
How to choose between strong acid and weak acid resins for industrial water treatment?
A: Key factors: raw water pH and treatment goals:
- pH ≥ 6 (e.g., tap water, neutral industrial wastewater): Weak acid resins (lower regeneration cost).
- pH < 6 (acidic wastewater) or heavy metal removal (e.g., nickel, copper): Prioritize strong acid resins (higher efficiency, thorough adsorption).
- Continuous production (e.g., food plant recirculating water): Strong acid resins' faster rate avoids frequent downtime.
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