文献类型：期刊文献

英文题名：NMSBA PRODUCED FROM NMST UNDER THE CATALYSIS OF SUPPORTED H3PW12O40 AND CO/MN/BR CATALYTIC SYSTEM

作者：He, Heng[1];Fang, Zhou-Wen[1];Zhang, Chao[1];Long, Xiang-Li[1]

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

年份：2018

卷号：96

期号：6

起止页码：1264

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20175204578788);WOS:【SCI-EXPANDED(收录号:WOS:000431508600004)】；

基金：The present work is supported by the NSFC (No. 21176081).

语种：英文

外文关键词：2-nitro-4-methylsulphonyltoluene; 2-nitro-4-methylsulphonylbenzoic acid; activated carbon; oxidation; H3PW12O40

摘要：The commercial production of 2-nitro-4-methylsulphonylbenzoic acid (NMSBA) is oxidizing 2-nitro-4-methylsulphonyltoluene (NMST) by nitric acid catalyzed with V2O5. A heterogeneous catalytic system composed of phosphotungstic acid supported on activated carbon, Co, Mn, and Br is used to catalyze the production of NMSBA from NMST by oxygen in this paper. The experiments show that the heterogeneous catalytic system composed of HPW@C, Co, Mn, and Br is capable of speeding up the oxidation of NMST to NMSBA by oxygen and acquiring a higher NMST oxidation rate and NMSBA yield than the homogeneous H3PW12O40/Co/Mn/Br catalytic system. The best HPW@C catalyst is obtained by supporting 0.0125 g/g H3PW12O40 on carbon followed by being calcined at 220 degrees C for 4 h under nitrogen atmosphere. The best heterogeneous catalytic system consists of 2.38 x 10(-3) g/g HPW@C, 925 ppm Br, 236 ppm cobalt, and a Mn/Co molar ratio of 2.5. The usage of phosphotungstic acid in the heterogeneous system is diminished substantially.