Artículo derivado de trabajo de tesis de doctoradoCarbonation of epoxidized linseed oil (CELO) containing five‐membered cyclic carbonate
(CC5) groups has been optimized to 95% by reacting epoxidized linseed oil (ELO) with carbon dioxide
(CO2) and tetrabutylammonium bromide (TBAB) as catalysts. The effect of reaction variables (temperature,
CO2 pressure, and catalyst concentration) on the reaction parameters (conversion, carbonation
and selectivity) in an autoclave system was investigated. The reactions were monitored, and
the products were characterized by Fourier Transform Infrared Spectroscopy (FT‐IR), carbon‐13 nuclear
magnetic resonance (13C‐NMR) and proton nuclear magnetic resonance (1H‐NMR) spectroscopies.
The results showed that when carrying out the reaction at high temperature (from 90 °C to 120 °C) and
CO2 pressure (60–120 psi), the reaction’s conversion improves; however, the selectivity of the reaction
decreases due to the promotion of side reactions. Regarding the catalyst, increasing the TBAB concentration
from 2.0 to 5.0 w/w% favors selectivity. The presence of a secondary mechanism is based
on the formation of a carboxylate ion, which was formed due to the interaction of CO2 with the
catalyst and was demonstrated through 13C‐NMR and FT‐IR. The combination of these factors
makes it possible to obtain the largest conversion (96%), carbonation (95%), and selectivity (99%)
values reported until now, which are obtained at low temperature (90 °C), low pressure (60 psi) and
high catalyst concentration (5.0% TBAB).Secretaría de Investigación y Estudios Avanzados 4965/2020CI
