High-Crystallinity Granular Zeolites of LTA, FAU, and MOR Structural Types with Hierarchical Porous Structure: Synthesis and Properties

Кутепов, Б. И.; Травкина, О. С.; Аглиуллин, М. Р.; Хазипова, А. Н.; Павлова, И. Н.; Бубеннов, С. В.; Kostyleva, S. A.; Григорьева, Н. Г.

doi:10.1134/s0965544119030095

Cited by 13 publications

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“…These materials are characterized by the high degree of crystallinity (95-99 %), micro-meso-macroporous structure and high acidity. [8,9] A promising potential application of hierarchical zeolite catalysts is the synthesis of N-heterocyclic compounds, including important quinoline and its derivatives. Quinolines are widely used in the production of highly effective drugs with antimalarial, [10][11][12][13][14] antitumor, [15][16][17] anti-inflammatory, [18,19] antiasthmatic, [15] antihypertensive, [20] and antibacterial [21] activities.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Quinolines by the Skraup Reaction: Hierarchical Zeolites vs Microporous Zeolites

et al. 2022

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The activity, selectivity, and stability of microporous highly dispersed zeolites (H-Y, H-ZSM-5) and granulated hierarchical zeolites (H-Y h and H-ZSM-5 h ) were studied in the synthesis of quinolines by the Skraup reaction. Texture, porous structure, morphology of crystals, acidic properties were characterized by XRD, XRF, N 2 adsorption-desorption, SEM, NH 3 -TPD methods. It was found that quinoline, 2-and 4-methylquinolines are the main products in the reaction of aniline with glycerol in the presence of the studied catalysts. H-ZSM-5 h and H-Y h catalysts are more efficient than catalysts H-ZSM-5 and HY and provide a yield of quinolines to 72.4 (H-ZSM-5 h ) and 60.2 % (H-Y h ) at 450 °C, 0.2 h À 1 , the molar ratio of aniline:glycerol = 1 : 3. The high activity and selectivity of hierarchical zeolites are due to the presence of meso-and macropores, as well as nanocrystals of 15-100 nm size. It was reported that hierarchical catalysts exhibit higher stability in the reaction compared with microporous zeolites.

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