Co改性SAPO-11分子筛择形催化2-甲基萘烷基化反应  

Shape Selective Catalysis of Co-Modified SAPO-11 Molecular Sieve for Alkylation of 2-Methylnaphthalene

作　　者：文志辉 刘清华 张荣斌[1] 冯刚 WEN Zhihui;LIU Qinghua;ZHANG Rongbin;FENG Gang(School of Chemistry and Chemical Engineering,NanChang University,Nanchang 330031,China)

机构地区：[1]南昌大学化工化学学院,江西南昌330031

出　　处：《化学反应工程与工艺》2022年第6期502-508,共7页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金面上项目(21875096)。

摘　　要：2,6-二甲基萘(2,6-DMN)是一种高附加值的聚酯单体。通过水热法合成SAPO-11分子筛,再经不同浓度Co(NO3)2进行改性,并用于催化2-甲基萘(2-MN)烷基化反应制备2,6-DMN。结果表明:经Co改性后的SAPO-11分子筛催化剂,2-MN转化率有一定程度降低,但是2,6-DMN选择性以及2,6-DMN和2,7-DMN(2,7-二甲基萘)物质的量之比(2,6-/2,7-DMN比)均有不同程度的提升。其中,Co质量分数为3%的Co/SAPO-11分子筛具有较高的活性,在400℃下反应3 h后,2,6-DMN的选择性和2,6-/2,7-DMN比分别达到了44.1%和2.06。Co浸渍修饰了SAPO-11分子筛的孔道结构并调变了分子筛的酸性性质,提高了催化剂的催化性能。2,6-Dimethylnaphthalene(2,6-DMN)is an high value-added polyester monomer.The SAPO-11 molecular sieves were synthesized by hydrothermal method.The SAPO-11 molecular sieves were modified with different concentrations of Co(NO3)2 for the catalytic alkylation of 2-methylnaphthalene(2-MN)to 2,6-DMN.The results showed that the conversion of 2-MN decreased with Co modified SAPO-11 molecular sieves,the selectivity of 2,6-DMN and molar ratio of 2,6-DMN to 2,7-DMN(2,6-/2,7-DMN ratio)increased.The 3%Co/SAPO-11(3%was the mass fraction of Co)exhibited high catalytic activity.After 3 hours of reaction at 400℃,the selectivity of 2,6-DMN and 2,6-/2,7-DMN ratio reached 44.1%and 2.06,respectively.Co modified pore structure and acidic properties of SAPO-11 molecular sieves,and improved the catalytic performance of the catalyst.

关 键 词：SAPO-11分子筛 择形催化 2-甲基萘 2 6-二甲基萘 烷基化 

分 类 号：O643.38[理学—物理化学] TQ426.61[理学—化学]