This study aimed to investigate the influence of the content of crystalline (10, 30, 60%) and amorphous (90, 70, 40%) aluminosilicates in the starting granules prepared for the synthesis of hierarchical ZSM-5 zeolite on the physicochemical properties, activity, selectivity, and stability of the resulting materials in the Skraup reaction for quinoline synthesis. As the ZSM-5 content in the parent granules was raised from 10 to 60%, increasing trends were observed for the micropore volume (from 0.10 to 0.13 cm³/g) and mesopore volume (from 0.05 to 0.19 cm³/g) in the granules of the resultant hierarchical zeolites H-ZSM-5_h(10, 30, 60). At the same time, the macropore volume decreased from 0.34 to 0.29 cm³/g. The H-ZSM-5_h(60) sample had the highest concentration of acid sites and exhibited the highest activity and selectivity in the Skraup reaction, as evidenced by 72% yield of quinolines. Moreover, this sample exhibited the highest stability, H-ZSM-5_h(60) remained stable for 9 h, whereas the activity of H-ZSM-5_h(10) and H-ZSM-5_h(30) dropped after 3–4 h.

The study investigates the catalytic performance of microporous and granular micro–meso–macroporous zeolites (H-ZSM-5 and H-ZSM-5h, respectively) in synthesis of quinolines by the reaction of 2-aminoacetophenone with diketones (2,4-pentanedione or dimedone), known as the Friedländer synthesis. In the presence of H-ZSM-5h, 1-(2,4-dimethylquinolin-3-yl)ethanone ( 1a ) and 3,4-dihydro-3,3,9-trimethyl-1(2 H )-acridinone ( 1b ) were produced in 82 and 93% yields, respectively.

Amorphous mesoporous materials are promising as catalysts for processes involving or forming bulk molecules. In a reaction such as acetone condensation to form mesitylene, an effective catalyst should not only have a developed porous structure but also have active centers of acidic and basic types. The sol–gel approach allows one to obtain titanosilicates with such characteristics. This work demonstrates the possibility of controlling their properties by varying the conditions for the synthesis of titanosilicate gels. It has been established that controlling hydrolysis allows one to increase the activity of amorphous mesoporous titanosilicates by 10 times: from acetone conversion of 6% to 60%. It has been shown that the use of titanium acetylacetonate complexes in the synthesis of gels leads to an increase in the content of tetracoordinated Ti in the structure and contributes to an increase in the acidity of titanosilicates. During the condensation of acetone on the obtained mesoporous titanosilicates, high acetone conversion (60–79%) and mesitylene selectivity of up to 83% were achieved.

The study investigates the catalytic performance of hierarchical granular Na–Y_h zeolites promoted with metal oxides (designated as ZnO/Na–Y_h, NiO/Na–Y_h, Co₃O₄/Na–Y_h, and CuO/Na–Y_h) in the synthesis of quinolines from aniline and n-propanol. The highest aniline conversion and highest total quinoline selectivity (49 and 63%, respectively) were achieved in the presence of the ZnO/Na–Y_h sample. The samples promoted with Ni, Co, and Cu oxides reached a twofold lower aniline conversion (20–26%) with quinoline selectivity of 42–51%.