A chemical manufacturer was facing a significant challenge with its spent hydrochloric acid stream. The 36% concentrated acid was contaminated with organic impurities, primarily chlorophenols and tetrachloroethylene, resulting in:
- Strong color and unpleasant odor — making the acid unsuitable for reuse or safe disposal
- High phenol content at 726.5 mg/L — far exceeding acceptable discharge and reuse thresholds
- Volatile organic compounds — posing environmental, safety, and operational risks
The company needed a reliable solution that could remove organic contaminants while preserving the acid concentration, enabling potential recovery and reuse of the valuable acid resource.
Solution: Macroporous Adsorption Resin Technology
Our technical team proposed a treatment system using our specialized HA-2 macroporous adsorption resin, designed specifically for organic removal from strong acid solutions.
How It Works
The spent hydrochloric acid is passed through a fixed-bed column packed with HA-2 resin. The resin’s highly cross-linked polystyrene structure and optimized pore distribution selectively adsorb organic contaminants (chlorophenols, tetrachloroethylene, and other organics) while allowing the HCl to pass through unaffected. When the resin reaches saturation, it can be regenerated with an appropriate eluent, restoring adsorption capacity for repeated use.
Results
| Parameter | Before Treatment | After Treatment |
|---|---|---|
| Appearance | Dark yellow-brown, opaque | Colorless and transparent |
| Phenol content | 726.5 mg/L | < 0.5 mg/L |
| TOC | High | < 100 ppm (phenol as surrogate) |
| Single column treatment capacity | ~60 bed volumes |
The system consistently delivered phenol removal rates exceeding 99.9%, producing a clear, colorless acid solution that meets strict quality standards for industrial reuse or compliant discharge.
Industries Served
This resin-based organic removal technology is widely applicable across multiple industries where acid stream purification or spent acid recovery is critical:
- Chemical Manufacturing — recovery and purification of hydrochloric acid, sulfuric acid, and other mineral acids
- Pharmaceutical & API Production — removal of organic impurities from acid streams in synthesis processes
- Dye & Pigment Industry — decolorization and organic removal from acid waste streams
- Steel & Metal Processing — purification of pickling acids (HCl, H₂SO₄) for reuse or compliant discharge
- Electronics & Semiconductor — ultra-pure acid production for wafer processing
- Pesticide & Agrochemical — removal of phenolics and organic byproducts from acid waste
- Textile & Fiber — treatment of acid dye baths and spent acid solutions
- Wastewater Treatment — advanced treatment of high-salinity, high-COD industrial effluents
Why Choose Our Solutions
1. Technical Expertise
With years of specialization in ion exchange and macroporous adsorption resin technologies, we deliver tailored solutions backed by a deep understanding of resin chemistry, process design, and industrial application requirements.
2. High-Performance Resins
Our HA-series and other specialty resins are manufactured with precise control over pore structure, surface area, and particle size distribution — ensuring superior adsorption capacity, fast kinetics, and long service life even under harsh chemical conditions.
3. End-to-End Support
From initial feasibility testing and process design to commissioning and ongoing technical support, we provide comprehensive service at every stage. Our laboratory facilities offer custom resin screening and optimization to match your specific wastewater or process conditions.
4. Cost-Effective & Sustainable
By enabling acid recovery and reuse, our solutions help clients significantly reduce both raw material costs and waste disposal expenses — while meeting increasingly stringent environmental regulations. Regenerable resin technology means lower long-term operating costs compared to alternative treatment methods.
5. Global Reach
Serving customers worldwide with reliable supply chains, responsive technical support, and flexible customization capabilities to meet diverse international industry standards.
Disclaimer: Hairun Resin and its affiliates expressly disclaim all express or implied warranties (including, without limitation, warranties of timeliness, accuracy, completeness, reliability, or fitness for a particular purpose) with respect to the content of this document (including forward-looking statements). Neither Hairun Resin nor its affiliates shall be held liable for any consequences arising from errors, omissions, or other deficiencies in the document.
