Abstract：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.
WEN Zhihui,LIU Qinghua,ZHANG Rongbin et al. Shape Selective Catalysis of Co-Modified SAPO-11 Molecular Sieve for Alkylation of 2-Methylnaphthalene[J]. Chemical Reaction Engineering and Technology, 2022, 38(6): 502-508.
