| To provide new research ideas for the preparation of vegetable oil-based cyclic carbonate products, epoxidized soybean oil fatty acid methyl ester and carbon dioxide were used as raw materials, and the vegetable oil-based cyclic carbonate was synthesized by catalyzing with quaternary ammonium salt catalyst and hydrogen bond donor. The synthesis conditions of vegetable oil-based cyclic carbonate were optimized by single factor experiment, the reaction kinetic was analyzed, and the product of vegetable oil-based cyclic carbonate was characterized by infrared spectroscopy. The results showed that the optimum conditions for the synthesis of vegetable oil-based cyclic carbonate were as follows: with sesamol as the hydrogen bond donor, molar ratio of tetrabutylammonium bromide to sesamol 2∶ 1, dosage of tetrabutylammonium bromide 10%(on the basis of molar amount of raw material epoxy bond), reaction temperature 120 ℃, reaction pressure 1.0 MPa and reaction time 10 h. Under the the optimum conditions, the yield of vegetable oil-based cyclic carbonate could reach 91.4%. The kinetic analysis of the reaction showed that the addition of sesamol reduced the activation energy of the reaction and facilitated the synthesis of vegetable oil-based cyclic carbonate. The infrared spectroscopy test showed that the target product was successfully synthesized. In summary, the vegetable oil-based cyclic carbonate under solvent-free conditions can be efficiently synthesized. |
