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Acylation of p-xylene over zeolites
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SYSNO ASEP 0375911 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Acylation of p-xylene over zeolites Author(s) Vitvarová, Dana (UFCH-W) RID
Kurfiřtová, Lenka (UFCH-W) RID
Pavlatová, Jana (UFCH-W)Source Title Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 179, č. 1 (2012), s. 78-84Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords acylation ; p-xylene ; zeolites Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA104/07/0383 GA ČR - Czech Science Foundation (CSF) GD203/08/H032 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000298404600010 DOI 10.1016/j.cattod.2011.06.033 Annotation Zeolites differing in structure and acidity were tested in liquid phase acylation of p-xylene. Hexanoyl chloride, propionic anhydride and isobutyric anhydride were used as acylating agents. The highest conversions of acylating agent were achieved over large pore zeolites USY (66.3%) and Beta (58.2%). It was found that acylation of p-xylene proceeds only over large pore zeolites Beta and USY. Selectivities to monoacylated p-xylene obtained over USY zeolite decreased in the order: propionic anhydride 78.0% > hexanoyl chloride 67.2% > isobutyric anhydride 33.1%. Diacylated product was formed over zeolite USY with all acylating agents tested but only with hexanoyl chloride over zeolite Beta. It was found that the optimum Si/Al ratio of zeolite Beta for p-xylene acylation with propionic anhydride is 25, while for isobutyric anhydride is 19. Conversion of isobutyric anhydride decreased with increasing isobutyric anhydride concentration and increased with increasing amount of catalyst. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2013
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