不同沸石分子筛催化剂上萘与异丙醇的烷基化反应  

Isopropylation of naphthalene over various zeolite catalysts

作　　者：刘琪英[1] 武文良[1] 王军[1] 王延儒[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2004年第3期12-14,共3页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省青年科技基金(BQ2000005);江苏省高技术研究项目(BG2001044)

摘　　要：考察了USY、Hβ、HMCM-22、HM、HZSM-5等5种沸石分子筛在萘与异丙醇烷基化反应中的催化性能,并用XRD和NH3-TPD等手段对催化剂的物化性质进行了表征。实验结果发现,沸石分子筛的酸性质和孔结构是影响其活性和选择性的主要因素,以弱酸和中强酸为主的酸性中心以及十二元环开放的孔道有利于提高催化剂活性,而与目标产物2,6-二异丙基萘的分子直径接近的一维孔道有利于其选择性的提高。Catalytic performances of USY, Hβ, HMCM-22, HM (mordenite) and HZSM-5 catalysts were investigated and compared in alkylation of naphthalene with isopropanol using a stainless-steel batch reactor, and their physical chemical properties were characterized by XRD and NH_3-TPD techniques. It is revealed that both acidity and pore structure of the zeolite are the key factors influencing the catalytic behavior. The active centers with weak and medium acid strength and the 12-membered ring open pore structure facilitate the catalytic activity in this reaction, while the narrow (unidimensional) pore is favorable to the selectivity of desired product.

关 键 词：沸石分子筛 催化剂 异丙醇 烷基化反应 2 6-二异丙基萘 

分 类 号：O643.36[理学—物理化学] O625.151[理学—化学]