文献类型：期刊文献

英文题名：A study on the oxidation of toluene to benzaldehyde by air catalyzed by polyoxometalate loaded on activated carbon

作者：Zhu, Di[1];Hai, Jun-qi[1];Wang, Le-yao[1];Long, Xiang-li[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2023

卷号：551

外文期刊名：MOLECULAR CATALYSIS

收录：;EI(收录号：20234314956205);WOS:【SCI-EXPANDED(收录号:WOS:001103911100001)】；

语种：英文

外文关键词：Benzaldehyde; Toluene; Oxidation; Catalysis; Polyoxometalate

摘要：At present, benzaldehyde is mainly produced in the way of liquid-phase chlorination of toluene followed by hydrolysis. Such method not only pollutes the environment with the discharge of large amount of waste water, but also limits its application into the field of food and medicine due to the existence of chlorides. In this paper, toluene is oxidized to benzaldehyde by air in acetic acid using polyoxometalate supported on activated carbon as a catalyst. The composition and preparation conditions of the catalyst have been explored. The optimum poly-oxometalate composition is determined as Na5.1La0.7CoMn0.3Mo11.7O40 & sdot;22.05H2O@AC by ICP-OES, FT-IR, XRD and TG. The optimum catalyst preparation conditions are pH1=6.3, pH2=3.8, T1=95 degrees C, T2=85 degrees C, activation temperature 220 degrees C and activation time 4 h. The best experimental results are toluene conversion 13.18 %, benzaldehyde selectivity 40.43 % and benzaldehyde yield 5.33 %.