MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202541134182 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 cyclonon-4-ynone.'
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 hydrodeoxygenation of biomass-derived eugenol was studied over Re-Ni bimetallic 5 catalysts supported on hierarchical KIT -6/H-Y zeolite in a fixed-bed down-flow reactor operated under atmospheric pressure. Catalysts with varying metal loadings (0.3 wt.% Re-9.7 wt.% Ni, 0.5 wt.% Re-9.5 wt.% Ni, and 1.0 wt.% Re-9.0 wt.% Ni) were evaluated to assess the influence of metal composition on catalytic behavior. The reaction was performed at temperatures of 350 C, 400 C, and 450 oc under continuous hydrogen flow, achieving 100 10 %conversion of eugenol after 12 h of operation. Among the tested catalysts, the 0.5 wt.% Re- 9.5 wt.% Ni/KIT-6-H-Y zeolite catalyst exhibited the highest selectivity, yielding cyclonon- 4-ynone as the major product with a selectivity of 63.87%, along with 1-cyclohexene-1- carboxaldehyde, 2,6,6-trimethyl- as a secondary product with a selectivity of 8.54% at 350 oc. The observed product distribution is attributed to the synergistic interaction between Re- 15 Ni active sites and the acidic, hierarchical pore structure of the KIT-6/H-Y zeolite, which promotes controlled deoxygenation and molecular rearrangement pathways. The generated. cyclic ketone and aldehyde products are valuable intermediates for specialty chemicals, fragrance formulations, polymer additives, and advanced material synthesis, highlighting the potential of this catalytic system for sustainable biomass valorization."
Disclaimer: Curated by HT Syndication.
