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Optimization for catalytic performances of Hβ zeolite in the acylation of 2-methylfuran by surface modification and solvents effect.

Authors :
Xiong, Yuannan
Chen, Wenqi
Zeng, Aiwu
Source :
Research on Chemical Intermediates. Mar2017, Vol. 43 Issue 3, p1557-1574. 18p. 1 Black and White Photograph, 2 Diagrams, 4 Charts, 8 Graphs.
Publication Year :
2017

Abstract

The liquid phase acylation of 2-methylfuran with acetic anhydride over modified Hβ zeolite was first conducted in a continuous flow reactor. The deactivation of Hβ zeolites was attributed to strong adsorption of reactants or products and was verified by GC-MS and C MAS NMR. Deactivated zeolites can be regenerated to their original state by calcination. The acidic properties was adjusted by surface modification on Hβ, the maximum yield of 89.5 mol% and selectivity of 100 % were obtained over tartaric acid modified by Hβ. The deposition of tetraethoxysilane to silica on Hβ contributed to enhancing the catalytic stability. Combined with the results of NH-TPD and Py-FTIR, the amount of Broensted acids played a major role on catalytic activity. A close relationship between the catalytic stability and the ratio of the amount of strong to weak acids at 1:1 was highlighted here. The solvents' effect on the catalytic performances was examined, and 1,2-dichloroethane with moderate polarity exerted a positive effect on catalytic stability. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09226168
Volume :
43
Issue :
3
Database :
Academic Search Index
Journal :
Research on Chemical Intermediates
Publication Type :
Academic Journal
Accession number :
121197958
Full Text :
https://doi.org/10.1007/s11164-016-2715-4