Industry partners Asahi Kasei, Nippon Steel, and Nippon Steel Trading have launched a closed-loop recycling program that reclaims pure titanium scrap generated during electrolysis-cell production and reintroduces it as high-grade feedstock for new titanium. The initiative aims to cut the environmental footprint of chlor-alkali cell manufacture while increasing material value and long-term circularity.
Program scope and objectives
The collaboration focuses on converting titanium scrap produced in the manufacture of chlor-alkali electrolysis cells back into clean titanium suitable for remelting. By looping the material back into the supply chain, the partners seek to reduce waste and lower the environmental impact associated with cell production while preserving the high-purity standards required for anode components.
Origins of the scrap and purity considerations
For decades, Asahi Kasei has supplied key electrolysis components for chlorine and caustic soda production. Titanium is used for anode protection because of its corrosion resistance and processability. Because the scrap used as feedstock must meet stringent purity requirements to avoid impurities in the remelting process, strict pre-treatment and quality controls are essential at every step.
How the recycling loop works
- Collection and sorting: Scrap generated at Asahi Kasei’s Nobeoka site is gathered and sorted for reprocessing.
- Processing and traceability: The material is shaped and certified to a form suitable for remelting, with digital tools providing end-to-end traceability.
- Remelting and feedstock production: A portion of the processed scrap is returned to Nippon Steel to support its titanium remelting operations, while the remainder is used at Asahi Kasei to produce new pure titanium.
Quality controls and traceability
Throughout the cycle, the partners maintain tight controls to prevent contamination and ensure the resulting titanium meets the required purity for electrolysis applications. The system relies on digital tracking to confirm origin, processing steps, and compliance with material specifications.
Strategic importance and future plans
The initiative strengthens the relationship among the three companies and demonstrates a practical approach to closing the loop for critical materials used in chlor-alkali cells. It complements other sustainability efforts, including related closed-loop recycling projects announced in 2025, and aligns with broader goals to decarbonize industrial metal use and boost resource efficiency.
Executives described the program as a concrete step toward a decarbonized, circular society. They highlighted the complementary roles of each partner: Nippon Steel’s advanced titanium remelting capabilities, Asahi Kasei’s established scrap-management system, and Nippon Steel Trading’s role in material collection and logistics. Together, they aim to scale recycling, increase the supply of clean titanium feedstock, and maximize the value recovered from manufacturing scrap.
