臭氧催化甲苯制苯甲酸的研究  

Study on catalyze of toluene to benzoic acid by ozone

作　　者：王有才[1] 潘鹤林[1] 赵志翔[1] 束明杰 

机构地区：[1]华东理工大学化工学院,上海200237

出　　处：《应用化工》2017年第5期955-958,共4页Applied Chemical Industry

摘　　要：以醋酸为溶剂,醋酸钴为催化剂,在常压下以臭氧-空气混合气体为氧化剂,对甲苯氧化制苯甲酸的过程进行了研究。重点考察了反应温度、反应时间、催化剂和引发剂对反应的影响。结果表明,反应温度为70℃,反应时间为120 min,气体流量为0.5 L/min,臭氧的浓度为29 mg/L,催化剂2.25%,反应物甲苯的质量分数为4.14%,苯甲酸的总收率可达83.2%,在加入质量分数0.18%的Na Br时,苯甲酸收率高达92.7%。Acetic acid as the solvent, cobalt acetate as a catalyst, at atmospheric pressure with ozone-air mixture oxidizer catalytic oxidation of toluene to benzoic acid process were studied. Emphasis on the effect of reaction temperature,reaction time,catalyst and initiator of the reaction. The results showed that：the re-action temperature is 70 ℃ , reaction time 120 min,the gas flow rate of 0. 5 L ymin,ozone concentration is 29 mg/L,catalyst 2.25% , reactants toluene mass fraction of 4. 14% , up to a total benzoic acid yield of 83.2% ,when the mass fraction of NaBr 0. 18% ,benzoic acid yield up to 92.1% .

关 键 词：甲苯 苯甲酸 臭氧 醋酸钴 

分 类 号：TQ245.1[化学工程—有机化工]