Baeyer–Villiger co-oxidation of cyclohexanone with Fe–Sn–O catalysts in an O2/benzaldehyde system

• Published in: Green processing and synthesis Vol. 10; no. 1; pp. 677 - 686
• Main Authors: Sun, Jingjing, Zhu, Qianqian, Guo, Xiaoyan, Jin, Haibo, He, Guangxiang, Ma, Lei, Zhang, Rongyue, Gu, Qingyang, Yang, Suohe
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 01.01.2021; Walter de Gruyter GmbH
• Subjects: Acids; Benzaldehyde; Benzophenone; BV oxidation; caprolactone; Catalysts; Catalytic activity; Chemical engineering; Chemical synthesis; Cyclohexanone; Dichloroethane; Enzymes; Fe–Sn–O catalyst; Flow rates; Flow velocity; Laboratories; Metal oxides; Oxidation; oxidation of cyclohexanone; Prisms; Reaction time; Roasting; ε-caprolactone
• ISSN: 2191-9542; 2191-9550
• DOI: 10.1515/gps-2021-0045

Baeyer–Villiger (BV) oxidation of cyclohexanone to -caprolactone was studied by a co-precipitation method using Fe–Sn–O catalysts in an O /benzaldehyde system. The effects of the Fe:Sn ratio, calcination temperature, calcination time, and reaction conditions on the catalytic performance were investigated. The catalysts present the best activity when it is prepared at a Fe:Sn ratio of 1:1, calcination temperature of 850°C, and calcination time of 5 h. Under these conditions, catalysts form a large number of small prisms, which result in a larger specific surface area and enhanced catalytic activity. The optimum reaction conditions for the synthesis of -caprolactone in the presence of the Fe–Sn–O catalyst are as follows: catalyst (0.12 g), 1,2-dichloroethane (30 mL), O flow rate of 25 mL min , cyclohexanone to benzophenone of 3:1, reaction temperature of 60°C, and reaction time of 5 h. The conversion of cyclohexanone and the average yield of -caprolactone are determined at 98.96% and 83.36%, respectively.