Abstract
Results of crystallization of two 1.0Al2O3 ⋅ 1.0P2O5 ⋅ 0.4SiO2 ⋅ 1.0DPA ⋅ 50H2O silicoaluminophosphate gels are compared; the gels are synthesized using pseudoboehmite in one case and aluminum isopropoxide in the other. It is shown that the choice of aluminum source significantly affects the phase composition of the resulting silicoaluminophosphate gels and the physicochemical properties of SAPO-11 samples crystallized from the gels and their catalytic properties in the vapor-phase isomerization of cyclohexanone oxime to caprolactam.
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ACKNOWLEDGMENTS
The synthesized materials were analyzed using the equipment of the Agidel Center for collective use of Institute of Petrochemistry and Catalysis of the Ufa Federal Research Center of the Russian Academy of Sciences.
Funding
This work was supported by the Russian Science Foundation (project no. 18-73-00007).
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Translated by M. Timoshinina
Abbreviations: BASes, Brønsted acid sites; LASes, Lewis acid sites; TEOS, tetraethyl orthosilicate; PB, pseudoboehmite; AI, aluminum isopropoxide; DPA, di-n-propylamine; XRD, X-ray diffraction analysis; SEM, scanning electron microscopy; TPD, temperature-programmed desorption; MAS NMR, magic angle spinning nuclear magnetic resonance spectroscopy.
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Agliullin, M.R., Faizullin, A.V., Khazipova, A.N. et al. Synthesis of Fine-Crystalline SAPO-11 Zeolites and Analysis of Their Physicochemical and Catalytic Properties. Kinet Catal 61, 654–662 (2020). https://doi.org/10.1134/S0023158420040011
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DOI: https://doi.org/10.1134/S0023158420040011