文献类型：期刊文献

英文题名：Production of NMSBA from the oxidation of NMST with oxygen catalyzed by H3PW12O40/Co/Mn/Br homogeneous catalytic system

作者：Long, Xiang-li[1];Zhang, Chao[1];Zhu, Yong[1];Yang, Zhi-lin[1];Yuan, Wei-kang[1]

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

年份：2016

卷号：286

起止页码：361

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20154601558781);WOS:【SCI-EXPANDED(收录号:WOS:000366790000040)】；

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

语种：英文

外文关键词：2-Nitro-4-methylsulfonyltoluene; 2-Nitro-4-methylsulfonylbenzoic acid; Homogeneous catalyst; Oxidation; Phosphotungstic acid

摘要：2-Nitro-4-methylsulfonylbenzoic acid (NMSBA) is usually manufactured from the partial oxidation of 2-nitro-4-methylsulfonyltoluene (NMST) by nitric acid under the catalysis of vanadium pentoxide. This paper reports a novel method for the production of NMSBA from the oxidation of NMST by oxygen catalyzed with a homogeneous catalyst system consisting of H3PW12O40/Co(II)/Mn(II)/Br. The experiments prove that this catalytic system realizes the oxidation of NMST to NMSBA. The optimal phosphotungstic acid concentration is 2500 ppm. The optimum Co(II) concentration is 148 ppm. The highest NMSBA yield is obtained with a Mn/Co ratio of 2.1. The best Br concentration is 1163 ppm. Temperature has a strong effect on the reaction rates. Oxygen partial pressure influences the NMST conversion and NMSBA yield greatly. The kinetic parameters, such as activation energy and reaction orders, have been estimated. (C) 2015 Elsevier B.V. All rights reserved.