NHPI catalyzed air oxidation of cyclohexanone: Mechanism and kinetics study

The Canadian Journal of Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract As an important monomer material for synthesizing polycaprolactone, ε‐caprolactone (ε‐CL), is currently produced through the Baeyer–Villiger oxidation of cyclohexanone. a green and promising process to produce ε‐CL, oxidizing cyclohexanone with air in presence sacrificial agents has attracted extensive attention from academia industry. However, slow reaction kinetic weak capacity limits application this technology. Herein, we used N‐hydroxyphthalimide (NHPI) as higdhly efficient homogeneous catalyst Through investigating influence conditions such temperature, gas velocity, aldehyde‐ketone ratio, solvent ratio on conversion rate selectivity optimum condition was obtained production high 3.43 mmol/gcat/min 90%. The mechanism investigated in‐situ UV–visible spectra, electron paramagnetic resonance (EPR) starch/KI experiment, plausible mechanistic mode involving three pivotal reactions proposed. dynamic model constructed validate proposed provide good predictions actual rate. This work provides meaningful insights into NHPI‐catalyzed cyclohexanone, theoretical guidance scale‐up processes.

Language: Английский

Comprehensive study of structural, optical, electrical, and magnetic properties of cobalt oxide nanoparticles synthesized via curd-based biogenic approach

Applied Physics A, Journal Year: 2025, Volume and Issue: 131(4)

Published: March 21, 2025

Language: Английский