MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202541134184 A) filed by Rajalakshmi Engineering College, Chennai, Tamil Nadu, on Dec. 31, 2025, for 'pilot scale process for the catalytic conversion of biomass lignin into high-energy hydrocarbons.'
Inventor(s) include Dr. K. L. Vincent Joseph; S. Deepika; and Dr. N. T. Mary Rosana.
The application for the patent was published on Feb. 27, under issue no. 09/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a sustainable catalytic route for the complete transformation of 5 biomass-derived eugenol to high-value bicyclic and aromatic compounds by an optimized bimetallic hierarchical heterogeneous catalyst. The process requires a 0.5 wt.% Re-9.5 wt.% Ni loaded hierarchical KIT-6/H-Beta zeolite, which allows efficient molecular transformation under controlled thermal conditions. The reaction is catTied out at 350 oc for 12 hours with I 00 % conversion of eugenol, while products are collected every 3-hour intervals. Under the 10 optimized conditions, bicyclo[nonane]-3-methylene is identified as the major product with a yield of 62.98 %, along with 2-methoxybenzyl alcohol as a significant secondary product with a yield of 20.11 %. The enhanced catalytic performance is attributed to the synergistic interaction between the rhenium and nickel active sites and the hierarchical porous structure of the KfT-6/H-Beta zeolite, which facilitates efficient c bond cleavage, hydrogen transfer, 15 and carbon skeleton rearrangement pathways. The bicyclo[nonane ]-3-methylene (Cl OH 16)produced tluough this process is a high-energy-density hydrocarbon and a rigid molecular scaffold suitable for advanced fuel formulations, specialty solvents, polyme. r intem1. ediates., and as a synthetic precursor for the development of functionalized pharmaceutical compounds. Invention provides a scalable and environmentally benign route for the complete valorization of lignin-derived phenolic feedstocks into industrially relevant chemicals."
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