MUMBAI, India, Jan. 23 -- Intellectual Property India has published a patent application (202521117265 A) filed by Shinde, Saurabh Eknath; Hedaoo, Namdeo A; and Dare, Pranoti Dipak, Pune, Maharashtra, on Nov. 26, 2025, for 'a method for preparing high-performance pyroasphalt using naturally and thermally aged pyrolysis oils derived from solid waste.'
Inventor(s) include Shinde, Saurabh Eknath; Hedaoo, Namdeo A; and Dare, Pranoti Dipak.
The application for the patent was published on Jan. 23, under issue no. 04/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a method for preparing high-performance pyroasphalt using naturally and thermally aged pyrolysis oils derived from solid waste. Pyrolysis oil is extracted through thermal decomposition of waste feedstocks at 400-900 C under inert, oxygen-free conditions. The extracted oil is subjected to either natural aging under ambient conditions for up to 24 months or thermal aging at 80 C for 2-24 hours to enhance chemical stability and reduce volatility. Aged pyrolysis oil is then blended with VG30 grade bitumen at 1-3% by weight at 150-160 C using a high shear mixer. The resulting modified binder exhibits improved penetration index, softening point, viscosity, rutting resistance, elastic recovery, and fatigue life compared to unmodified and fresh-oil-modified binders. FTIR analysis confirms reduced oxidation and enhanced molecular stability. The process offers an eco-friendly, cost-effective solution for road infrastructure while contributing to solid waste valorization and sustainable pavement development."
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