磺酸类离子液体催化合成对叔丁基苯甲酸甲酯的研究  

Efficient sulfonic acid type ionic liquid catalyst for synthesis of methyl 4-tert-butylbenzoate

作　　者：吴芹 程亚冉 宋淑芬 黎汉生 史大昕 张耀远 赵芸 矫庆泽 WU Qin;CHENG Ya-ran;SONG Shu-fen;LI Han-sheng;SHI Da-xin;ZHANG Yao-yuan;ZHAO Yun;JIAO Qing-ze(School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China;School of Materials and Environment,Zhuhai Campus,Beijing Institute of Technology,Zhuhai 519085,China)

机构地区：[1]北京理工大学化学与化工学院,北京100081 [2]北京理工大学珠海学院材料与环境学院,广东珠海519085

出　　处：《现代化工》2023年第1期87-91,97,共6页Modern Chemical Industry

基　　金：国家自然科学基金项目(21736001)。

摘　　要：在催化合成对叔丁基苯甲酸甲酯(MPTBBA)的反应中,催化剂对设备造成损坏同时难以分离的问题会对后续处理造成一定的压力。以磺酸类离子液体为催化剂并表征了其酸性,在不同催化剂结构、反应温度以及催化剂用量和原料摩尔比的条件下研究了催化反应性能。结果表明,以催化活性较高的离子液体吡啶1,4-丁烷磺内酯硫酸氢盐为催化剂,在反应温度为140℃、n(甲醇)∶n(对叔丁基苯甲酸(PTBBA))∶n(离子液体)为1000∶100∶1的条件下反应2.5 h,PTBBA的转化效率可达到90%。磺酸类离子液体酸性表征结果表明,催化活性与其酸量有关,酸量越高磺酸类离子液体的催化活性越高。In the catalytic synthesis reaction of p-tert-butyl methyl benzoate(MPTBBA),the catalyst may cause damage to equipment due to common shortcomings,and is difficult to be separated,which will cause certain troubles to subsequent processing.Sulfonic acid type ionic liquid is taken as the catalyst,and its acidity is characterized.The catalytic reaction performance is studied under different catalyst structures,reaction temperatures,catalyst dosages and molar ratios between feedstocks.It is found that the conversion rate of p-tert-butylbenzoic acid(PTBBA)can reach 90%after 2.5 h of reaction by using pyridine 1,4-butane sulfolactone hydrogen sulfate ionic liquid as catalyst when reaction temperature is at 140℃,and the molar ratio of methanol,PTBBA and ionic liquid is 1000∶100∶1.It is shown from characterization on the acidity of sulfonic acid type ionic liquid that the catalytic activity of ionic liquid is related to its amount of acid.The higher the amount of acid,the higher the catalytic activity of sulfonic acid type ionic liquid.

关 键 词：酸催化 磺酸类离子液体 对叔丁基苯甲酸甲酯 酯化反应 

分 类 号：TQ245.2[化学工程—有机化工]