Selective oxidation of p-chlorotoluene with Co(OAc)2/MnSO4/KBr in acetic acid-water medium

被引：16
|
作者：
Hu, An-Jun [1 ]
Lu, Chun-Xu [1 ]
Wang, Hai-Ying [1 ]
Li, Bin-Dong [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Dept Chem Engn, Nanjing 210094, Jiangsu, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 08期
关键词：
selective oxidation; p-chlorobenzaldehyde; cobalt; manganese; bromide;
D O I：
10.1016/j.catcom.2006.11.023
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Selective oxidation of p-chlorotoluene catalyzed by Co(OAC)(2)/MnSO4/KBr with molecular oxygen has been studied. Acetic acid-water is used as the reaction medium in place of pure acetic acid to avoid the nuisance of acetic acid separation. It is found that when MnSO4 is used in place of the commonly used Mn(OAc)(2), MnO2 barely forms and the activity of the composite catalyst greatly enhances. Under the optimized conditions (Co/(Co + Mn) mole ratio 0.2, Br/(Co + Mn) mole ratio 0.3, and reaction temperature 106 degrees C), 22.4% yield of p-chlorobenzaldehyde was obtained at 33.7% conversion of p-chlorotoluene with 66.6% selectivity. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：1279 / 1283
页数：5
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