Kinetics study of the N-formylation of aniline with DMF catalyzed by temperature-controlled Brønsted ionic liquids

• Published in: Chinese journal of chemical engineering 2022-12, Vol.52, p.154-160
• Main Authors: Zheng, Yipeng, Cao, Zhennan, Zhou, Zheng, Yang, Gaodong, Zhang, Zhibing
• Format: Article
• Language: English
• Subjects: Ionic liquid; Kinetic; N-formylation of aniline; Temperature-controlled system
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/j.cjche.2021.09.009

[Display omitted] •Series of SO3-functionial Brønsted ionic liquids were synthesized.•An ionic liquid catalyzed process for N-formylation of aniline with DMF was developed.•The selected ionic liquid was approved to form a temperature-controlled system with reactants.•The kinetic model were built and the reaction kinetic were revealed. A series of SO3-functional Brønsted acidic ionic liquids (SBAILs) were prepared to catalyze the N-formylation of aniline with DMF. The reaction conditions such as ionic liquid type, reaction temperature, catalyst loading and molar ratio of reactants were investigated. To the best of our knowledge, kinetic model for the N-formylation of aniline with DMF using SBAIL was firstly built and simulated. The studies on the reaction order of the reaction were evaluated by initial concentration method, and the kinetic parameters such as reaction rate constant and activation energy were proposed and used to explain the catalytic activities of the SBAILs catalysts. Accordingly, the recycling experiments showed that the SBAIL [Bsmim][HSO4] can be easily recovered and reused with stable activity. Further, the temperature-controlled study emphasized that the ionic liquid was easy to be separated and environmentally friendly.