Hybrid ed‑electrolysis & IX polish for ultra-pure sulfuric acid recycling
A novel hybrid electrodialysis-electrolysis system for recycling sulfuric acid with ultra-high purity, achieving metal impurity levels below 5 ppt and recycling rates over 99%.
Overview
This solution introduces a novel hybrid electrodialysis-electrolysis system designed for sulfuric acid recycling, achieving ultra-high purity with metal impurity levels below 5 parts per trillion (ppt) and a recycling efficiency over 99%. Unlike traditional methods that rely on energy-intensive distillation, this system operates at 25–60°C, utilizing a low-temperature electrochemical process that separates metal contaminants at their source. The process features a polishing stage using a chelating iminodiacetic resin, ensuring semiconductor-grade purity, while also reducing energy consumption and minimizing material corrosion.
Technical specifications
- Electrodialysis (ED) stack: Utilizes monovalent-selective cation-exchange membranes to concentrate pure acid.
- Electrodeposition chamber: Employs a high-surface-area electrode to deposit metal cations as solids, permanently removing them.
- Polishing column: Packed with chelating iminodiacetic resin to capture residual ions.
- Operational efficiency: Functions efficiently at temperatures below 100°C, avoiding acid decomposition.
- Modular design: Facilitates seamless integration into existing chemical management systems in fabrication facilities.
Technology readiness level
This technology is currently at TRL 4, indicating that it has been validated in a laboratory setting but requires further development and testing in operational environments. The complete design package, including detailed P&ID and specifications, allows for independent implementation and operation by partners like Halo.
About Valor Infrastructure Holdings, LLC
Valor Infrastructure Holdings, LLC is a patent licensing firm that focuses on developing and licensing intellectual property for critical infrastructure. The company specializes in four core architectural clusters: AI data center thermal infrastructure, acoustic medical platform technology, atmospheric filtration, and infrastructure safety systems. Operating under a pure-licensing model, Valor designs and files foundational US patents, allowing industrial partners to manage the manufacturing, distribution, and deployment of the resulting technologies. Their approach centers on the creation of robust patent architectures that address technical challenges in efficiency, safety, and environmental control.
By licensing these architectures, Valor enables industry leaders to implement advanced systems such as phononic-crystal atmospheric filtration for hospitals, self-stabilizing infrastructure control surfaces, and acoustic-based water purification. These solutions are designed to integrate with modern networks, such as smart-hospital management systems, offering alternatives to traditional filter media or chemical-heavy processes. The company emphasizes a commitment to long-term intellectual property foundations as a means to foster innovation in complex infrastructure environments.
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