甲基萘烷基化合成2 ,6-二甲基萘技术研究进展  

Research Progress on the Synthesis of 2,6-Dimethynaphthalene by Alkylation of Methylnaphthalene

作　　者：李亚兴 吴玉超 张昊天 苏凯宁 杨卫胜 孟祥海[2] LI Yaxing;WU Yuchao;ZHANG Haotian;SU Kaining;YANG Weisheng;MENG Xianghai(Petrochemical Research Institute Company Limited,CNPC,Beijing 102206,China;College of Chemical Engineering and Environment,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油集团石油化工研究院有限公司,北京102206 [2]中国石油大学(北京)化学工程与环境学院,北京102249

出　　处：《石油学报（石油加工）》2024年第4期1041-1050,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油天然气股份有限公司炼化新材料板块项目(22-LH-70-05)基金资助。

摘　　要：聚萘二甲酸乙二醇酯(PEN)作为一种新兴的高性能聚酯材料,具有极好的应用前景。然而,由于合成PEN的前驱体2,6-二甲基萘(2,6-DMN)生产成本高昂制约了PEN的应用发展,所以开发成本低廉的2,6-DMN的合成路线具有重要意义。对比2,6-DMN各种合成路线的优缺点,发现具有合成路线短和生产成本低的甲基萘烷基化是合成2,6-DMN的理想路线。重点综述了甲基萘烷基化合成2,6-DMN技术的研究进展,介绍了分子筛催化甲基萘烷基化反应机理和特点。由于烷基化反应属于Br nsted酸催化的过渡态择形反应,同时受甲基萘和2,6-DMN等产物的扩散控制,所以采用较多弱酸位点且孔径为0.6 nm的分子筛有利于提高反应活性、选择性和稳定性。基于此,总结了调控分子筛酸性和孔道结构的方法,为设计合成甲基萘烷基化高性能分子筛提供思路。Poly(ethylene naphthalate)(PEN)shows excellent application potentials as an emerging high-performance polyester material.However,the development of PEN is hindered due to the high cost of 2,6-dimethynaphthalene(2,6-DMN)precursor.Therefore,it is of great significance to develop a low-cost synthesis route of 2,6-DMN.In comparison of various 2,6-DMN synthesis methods,alkylation of methylnaphthalene is founded to be more desirable due to its short and economical synthesis route.The paper reviews recent advances in 2,6-DMN synthesis via alkylation of methylnaphthalene,and introduces the alkylation mechanism and characteristics.Alkylation of methylnaphthalene is a shape-selective reaction catalyzed by Br nsted acid,which is also controlled by diffusion of methylnaphthalene and products such as 2,6-DMN.Therefore,reaction activity,selectivity and stability are enhanced using molecular sieves with weaker acid sites and pore sizes within 0.6 nm.Based on this,the methods of tuning the acidity and pore structures are evaluated,which provide strategies for designing high catalytic-performance molecular sieves for the alkylation of methylnaphthalene.

关 键 词：2 6-二甲基萘 甲基萘 烷基化 分子筛 择形催化 

分 类 号：TQ241.5[化学工程—有机化工]