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沸石分子筛在2，6-二甲基萘合成中的研究进展
Research Progress of Zeolite Molecular Sieves in the Synthesis of 2,6-Dimethylnaphthalene
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- DOI:
- 作者:
- 万洪维，迪丽达尔，原 雯，魏书梅
Wan Hongwei, Dilidaer, Yuanwen, Wei Shumei
- 作者单位:
- 中国石油乌鲁木齐石化公司研究院
PetroChina Institute for Research of Urumqi Petrochemical Company
- 关键词:
- 2，6-二甲基萘（2，6-DMN）；沸石催化剂；择形催化；孔道工程；转移烷基化
2,6-Dimethylnaphthalene（2,6-DMN）; Zeolite catalysts; Shape-selective catalysis; Pore engineering; Transalkylation
- 摘要:
- 2，6-二甲基萘（2，6-DMN）作为聚萘二甲酸乙二醇酯（PEN）合成的关键中间体，其高效制备技术近年来备受关注。系统综述了沸石分子筛在 2，6-DMN合成中的研究进展，重点分析了不同拓扑结构沸石的催化特性。研究表明，具有特定孔道结构的沸石催化剂（如ZSM-5、ZSM-12、SAPO-11等）通过精确的孔道调控和酸性位点修饰，可显著提升2，6-DMN的择形选择性。其中，ZSM-12的一维直孔道结构对 2，6-/2，7-DMN异构体展现出近 10倍的扩散能垒差异，表现出优异的分子筛分性能。金属改性策略（如 Pd、Mo、Ni等）可有效调变沸石的酸性特征，增强催化稳定性。此外，以 C10重芳烃为烷基源的转移烷基化工艺为 2，6-DMN 的绿色合成提供了新思路。最后对未来沸石催化剂的设计和工艺优化方向提出了展望。As a key intermediate for polyethylene naphthalate (PEN) synthesis, the efficient production of 2,6-dimethylnaphthalene(2,6-DMN) has attracted considerable attention in recent years. This review systematically summarizes the research progress in zeo⁃lite-catalyzed synthesis of 2,6-DMN, with particular focus on the catalytic characteristics of zeolites with different topological struc⁃tures. Studies demonstrate that zeolite catalysts with specific pore architectures (e.g., ZSM-5, ZSM-12, SAPO-11) significantly en⁃hance shape selectivity toward 2,6-DMN through precise pore engineering and acid site modification. Notably, the one-dimensionalstraight channels of ZSM-12 exhibit a remarkable diffusion energy barrier difference (approximately 10-fold) between 2,6- and 2,7-DMN isomers, demonstrating superior molecular sieving capability. Metal modification strategies (e.g., Pd, Mo, Ni) effectively modu⁃late the acidic properties of zeolites and improve catalytic stability. Furthermore, the transalkylation process using C10 heavy aromat⁃ics as alkyl sources provides a novel approach for green synthesis of 2,6-DMN. Finally, perspectives on future directions for zeolitecatalyst design and process optimization are proposed.