对二甲苯选择性氧化合成对甲基苯甲酸  

Selective Oxygenation of p-Xylene to p-Toluic Acid Catalyzed by 1,4-Diamino-2,3-dichloro-anthraquinone and N-Hydroxyphthalimide

作　　者：仇振华[1] 

机构地区：[1]石家庄化纤有限责任公司,河北石家庄050032

出　　处：《精细化工中间体》2008年第3期39-41,44,共4页Fine Chemical Intermediates

摘　　要：使用1,4-二氨-2,3-二氯蒽醌(DACAQ)与N-羟基邻苯二甲酰亚胺(NHPI)非金属催化剂实现了对二甲苯空气选择性氧化合成对甲基苯甲酸。分别加入NHPI4%(n/n)和DACAQ1%(n/n,以反应物总量计)为催化剂,在氧气压力0.9MPa、温度为120℃的条件下,反应2h,对二甲苯转化率达59%,对甲基苯甲酸产品选择性达70%。与传统金属催化剂相比,采用该非金属催化体系产品选择性大大提高,为对甲基苯甲酸的工业化生产提供了一条更具吸引力的途径。Selective aerobic oxidation of p-xylene to p-toluic acid was successfully achieved by the use of non-metal catalyst, N-hydroxyphthalimide （NHPI）, in the presence of 1,4-diamino-2,3-dichloro-anthraquinone （DACAQ）. After optimization, p-xylene was oxidized with 59% conversion and 70% selectivity forp-toluic acid at 120℃ under 0.9 MPa of 02 for 2 h when NHPI （4.0%, n/n） and DACAQ （1.0%, n/n） was employed. The selectivity notably increased with this metal-free catalytic system compared with traditional metal catalyst, which may lead us to a more promising route for the industrial production ofp-toluic acid.

关 键 词：非金属 空气氧化 对甲基苯甲酸 蒽醌 N-羟基邻苯二甲酰亚胺 

分 类 号：TQ227.1[化学工程—有机化工]