钴酞菁催化氧气氧化邻硝基甲苯制取邻硝基苯甲酸  

Process of Preparing o-Nitrobenzoic Acid from o-Nitrotoluene by Dioxygen Oxidation with Cobalt Phthalocyanine

作　　者：宋旭锋[1] 纪红兵[2] 周贤太[1] 佘远斌[1] 

机构地区：[1]北京工业大学环能学院绿色化学研究所,北京100022 [2]华南理工大学化工学院,广东广州510640

出　　处：《精细化工》2004年第6期474-476,共3页Fine Chemicals

基　　金：北京市自然科学基金(2002002);北京市科技新星计划项目(953811200)~~

摘　　要：研究了以钴酞菁为模拟酶催化剂、氧气液相氧化邻硝基甲苯制取邻硝基苯甲酸的最佳工艺条件,考察了温度、氧气压力、溶剂比〔V(甲醇)/V(苯)〕、反应时间、n(NaOH)/n(邻硝基甲苯)等参数对邻硝基苯甲酸收率的影响,发现助催化剂NaOH用量和溶剂体积比影响较大。在温度为40℃、氧气压力为3 0MPa、V(甲醇)/V(苯)=2、n(NaOH)/n(邻硝基甲苯)=11 7时,邻硝基苯甲酸收率可达77 8%。The process for preparing o-nitrobenzoic acid (ONBA) from o-nitrotoluene (ONT) by liquid-phase oxidation with dioxygen in the presence of biomimetic catalyst cobalt phthalocyanine was investigated.Many parameters including reaction temperature,oxygen pressure,solvent volume ratio (methanol/benzene),reaction time and molar ratio of co-catalyst NaOH to ONT were found to influence the yield of ONBA,among which solvent volume ratio and molar ratio of NaOH to ONT were more prominent.Under the optimal reaction conditions such as reaction temperature 40 ℃,oxygen pressure 3.0 MPa,volume ratio of methanol to benzene 2.0 and molar ratio of NaOH to ONT 11.7,yield of ONBA about 77.8% was achieved.

关 键 词：邻硝基苯甲酸 邻硝基甲苯 氧气氧化 钴酞菁 

分 类 号：O625.61[理学—有机化学] O621.254[理学—化学]