CO_2直接羧化法制备3,4-二甲基苯甲酸的研究  

Study on synthesis of 3,4-dimethylbenzoic acid by direct carboxylation with carbon dioxide

作　　者：刘琳[1] 秦金兰[1] 邢锦娟[1] 钱建华[1] 

机构地区：[1]渤海大学功能化合物的合成与应用辽宁省重点实验室,辽宁锦州121003

出　　处：《天然气化工—C1化学与化工》2010年第1期43-45,共3页Natural Gas Chemical Industry

基　　金：辽宁省教育厅重点实验室项目(20060013)

摘　　要：以AlCl3为催化剂,通过CO2直接羧化邻二甲苯制备了3,4-二甲基苯甲酸,并优化了反应条件。最终优化条件为为:在0.8MPa～0.9MPa下,催化剂加入量为邻二甲苯质量的62.13%,温度为50℃,反应时间为12h时,产品产率大于85%,产品纯度为96%。3,4-dimethylbenzoie acid was synthesized by direct carboxylation of o-xylene with carbon dioxide used AlCl3 as catalyst, and the reaction conditions were optimized. The optimal reaction parameters were determined as follows： 0.8 MPa^0.9 MPa, 50℃, reaction time 12 hours, and AlCl3/o-xylene mass ratio of 62.13%. Under the optimized conditions, the yield of 3,4-dimethylbenzoic acid could be over 85% with the product purity of 96%.

关 键 词：二氧化碳 邻二甲苯 羧化反应 3 4-二甲基苯甲酸 

分 类 号：O643[理学—物理化学]