Alkylation of Aniline with Methanol over CsNaY Zeolites with Different Crystal Sizes

This study investigates the effects of FAU(Y) crystal size (350, 450, and 850 nm) on the physicochemical properties and catalytic performance of CsNaY samples in the alkylation of aniline with methanol. The physicochemical properties of the samples were examined by SEM, X-ray fluorescence analysis,...

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Bibliographic Details
Published in:Petroleum chemistry 2022-09, Vol.62 (8), p.924-932
Main Authors: Ponomareva, O. A., Rodionova, L. I., Shaposhnik, P. A., Nazarova, V. I., Zasukhin, D. S., Dobryakova, I. V., Popov, A. G., Ivanova, I. I.
Format: Article
Language:English
Subjects:
Adsorption
Alkylation
Ammonia
Aniline
Cesium ions
Chemistry
Chemistry and Materials Science
Chloroform
Crystals
Industrial Chemistry/Chemical Engineering
Infrared spectroscopy
Ion exchange
Low temperature
Methanol
Methylation
Nitrogen
NMR spectroscopy
Selectivity
X ray fluorescence analysis
Zeolites
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Summary:This study investigates the effects of FAU(Y) crystal size (350, 450, and 850 nm) on the physicochemical properties and catalytic performance of CsNaY samples in the alkylation of aniline with methanol. The physicochemical properties of the samples were examined by SEM, X-ray fluorescence analysis, low-temperature nitrogen adsorption, XRD, NH 3 –TPD, IR spectroscopy of adsorbed chloroform, and 27 Al MAS NMR. Reducing the zeolite crystal size was found to strengthen the CsNaY basic properties and enhance the selectivity towards N -alkylated products. The highest activity and stability in aniline methylation was achieved by the CsNaY sample consisting of 450-nm crystals that had a Na + for Cs + ion exchange degree of 64% and was modified with CsOH. This sample provided aniline conversion of 95% and the selectivity towards N -alkylated product of 99.8%.
ISSN:0965-5441
1555-6239
DOI:10.1134/S0965544122070143