New Method Recovers 90 Percent of Antimony From Plastic
Rice University researchers developed a way to extract critical metals from flame-retardant waste using flash Joule heating.
Updated on Oct. 21, 2026 in Materials Science
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Rice University researchers have developed a method to recover antimony from flame-retardant plastic waste using a technique called isothermal-clamped flash Joule heating. This research-stage process successfully extracted 90 percent of the antimony from tested electrical and electronic components.
Why it matters
Antimony is a critical metal with a constrained global supply, and traditional disposal methods create hazardous bromide compounds. This process offers a way to reclaim essential materials while mitigating the environmental impact of projected plastic waste growth.
The process achieved 90 percent recovery of antimony and 83 percent conversion of bromide into hydrogen bromide. The plastic waste spent 9.4 milliseconds within the target temperature range to avoid the 200-500 degrees Celsius window where hazardous organic bromide compounds form.
The players
Rice University
A Houston-based research institution recognized for its focus on materials science, nanotechnology, and advanced manufacturing processes.
Air Force Office of Scientific Research
A defense research agency that funds fundamental science and engineering studies for aviation and materials technology.
U.S. Army Corps of Engineers
A federal engineering organization that supports public infrastructure and research development projects.
The details
Researchers ground plastic waste into powder and placed it between sheets of electrically heated carbon paper. The system applies a pulse of high heat, keeping the material at a specific temperature to vaporize the antimony for collection. This isothermal-clamped flash Joule heating approach prevents the formation of harmful byproducts that typically occur in traditional incineration processes.
Timeline
October 2026: Rice University researchers published findings in Nature Chemical Engineering.
2030: Projected volume of global flame-retardant plastic waste reaches 82 million metric tons.
The Tech Race
This development extends the existing Rice University flash Joule heating research program by applying rapid electrical heating to the recovery of critical minerals from industrial plastic waste. It represents an attempt to bypass traditional, less efficient recycling methods that have historically failed to capture rare materials from flame-retardant components.
This research is currently at the laboratory stage and does not yet affect consumer electronics or waste management services in Houston. It serves as a proof-of-concept for electronics manufacturers and recycling facilities to improve the recovery of rare materials from power supplies and circuit boards.
The takeaway
The research successfully demonstrates that flash Joule heating can reclaim 90 percent of antimony from common plastic waste components. Industry observers should watch for potential pilot programs that scale this process for commercial waste management facilities.
Further reading
Learn more about the latest innovations in Materials Science.
Source note: This article includes information reported by Recycling Today.
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