期刊
CATALYSTS
卷 11, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/catal11111402
关键词
1; 5; 9-cyclododecatriene; 1; 2-epoxy-5; 9-cyclododecadiene; hydrogen peroxide; Ti-MCM-41
资金
- Rector of the West Pomeranian University of Technology in Szczecin [ZUT/11/2021]
This study achieved high selectivity epoxidation of 1,5,9-cyclododecatriene under the catalysis of Ti-MCM-41 by adjusting reaction conditions, obtaining high reaction conversion rate and selectivity.
This work presents the results of our research on the epoxidation of 1,5,9-cyclododecatriene (CDT) with hydrogen peroxide over the Ti-MCM-41 catalyst. The influence of the following parameters on the course of the process was investigated: temperature, CDT:H2O2 molar ratio, solvent composition and its type, and catalyst content. The highest selectivity of CDT transformation to 1,2-epoxy-5,9-cyclododecadiene (ECDD)-approximately 100 mol%, the highest yet reported-was obtained at the CDT conversion of 13 mol% and with the following parameter values: a catalyst content of 5 wt%; a molar ratio of CDT:H2O2 = 2; isopropyl alcohol (i-PrOH) as the solvent, with a composition of 80 wt% in the reaction mixture; a temperature of 80 degrees C; and a reaction time of 240 min. The highest conversion of CDT (37 mol%) was obtained at the ECDD selectivity of 56 mol% and using the following process parameters: a catalyst content of 5 wt%; a molar ratio of CDT:H2O2 = 0.5; i-PrOH used as the solvent, with solvent composition of 80 wt%; a temperature of 80 degrees C; and a reaction time of 60 min. It should be emphasized that the CDT conversion obtained in the current study is higher (by 9 mol%) than that described in the literature on heterogeneous catalysts.
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