Yang Chunhua, Wang Xiaomei, Lin Chun-Hong, Zhu Wentao
College of Chemical Engineering, Northeast Electric Power University Jilin City 132012 China
RSC Adv. 2022 Jun 28;12(29):18773-18778. doi: 10.1039/d2ra02427f. eCollection 2022 Jun 22.
Aniline is one of the important organic chemical raw materials and is widely used in the chemical production industry, including dyes, pharmaceuticals, pesticides, explosives, spices, At present, the yield and selectivity of aniline synthesis by direct amination are relatively low, and how to improve the catalytic efficiency has become an urgent problem to be solved. A series of Ti-V-MCM-41 catalysts with different silicon-titanium ratios was prepared by the hydrothermal synthesis method. According to the analysis of XRD, FT-IR, UV-vis DRS, BET, and SEM characterization of Ti-V-MCM-41, it was found that V-O-Si and Ti-O-Si were distributed on Ti-V-MCM-41. The direct photocatalysis amination of benzene and ammonia to aniline can be realized under mild conditions with this catalyst. The yield and selectivity of aniline were improved to 6.11% and 90.7%, respectively, by optimizing the synthesis and reaction conditions.
苯胺是重要的有机化工原料之一，广泛应用于化学生产行业，包括染料、制药、农药、炸药、香料等。目前，直接胺化合成苯胺的产率和选择性较低，如何提高催化效率已成为亟待解决的问题。采用水热合成法制备了一系列不同硅钛比的Ti-V-MCM-41催化剂。通过对Ti-V-MCM-41的XRD、FT-IR、UV-vis DRS、BET和SEM表征分析，发现V-O-Si和Ti-O-Si分布在Ti-V-MCM-41上。利用该催化剂可在温和条件下实现苯和氨直接光催化胺化制苯胺。通过优化合成和反应条件，苯胺的产率和选择性分别提高到了6.11%和90.7%。
