Título

Yield and Selectivity Improvement in the Synthesis of Carbonated Linseed Oil by Catalytic Conversion of Carbon Dioxide

Autor

DAVID ALEJANDRO GONZALEZ MARTINEZ

SUSANA HERNANDEZ LOPEZ

ENRIQUE VIGUERAS SANTIAGO

Nivel de Acceso

Acceso Abierto

Resumen o descripción

Artículo derivado de trabajo de tesis de doctorado

Carbonation 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 4965/2020CIB

Editor

MDPI

Fecha de publicación

10 de marzo de 2021

Tipo de publicación

Artículo

Fuente

2073-4360

Idioma

Inglés

Relación

13

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

24

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