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On the Role of Zeolite Structure and Acidity in Toluene Acylation with Isobutyric Acid Derivatives
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SYSNO ASEP 0101103 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title On the Role of Zeolite Structure and Acidity in Toluene Acylation with Isobutyric Acid Derivatives Title Vliv struktury různých typů zeolitů a jejich kyselosti na acylaci toluenu deriváty isobutyrové kyseliny Author(s) Klisáková, Jana (UFCH-W)
Červený, L. (CZ)
Čejka, Jiří (UFCH-W) RID, ORCID, SAISource Title Applied Catalysis A - General. - : ELSEVIER SCIENCE BV - ISSN 0926-860X
Roč. 272, č. 1 (2004), s. 79-86Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords toluene acylation ; isopropyltolyl ketone ; zeolite catalysts Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/03/0804 GA ČR - Czech Science Foundation (CSF) KJB4040402 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z4040901 - UFCH-W Annotation Zeolite catalysts of various structures and type and concentration of acid sites were investigated in a liquid phase acylation of toluene with derivatives of isobutyric acid. The highest conversions of isobutyryl chloride or isobutyric anhydride were obtained over three-dimensional large pore zeolite Beta and zeolite Y possessing medium concentration of acid sites. In general, the conversion of acylating agents increases with increasing pore size diameter and dimensionality of the channel system. Large-pore zeolites with three-dimensional channel system enable easier desorption and transport of bulky isopropyltolyl ketone. The activity of the zeolites used can be also controlled by tailoring their hydrophobic/hydrophilic properties. The higher initial rate of toluene acylation with isobutyric anhydride compared to isobutyryl chloride was found. However, only one possible acylating group of isobutyric anhydride is used for acylation reaction. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2005
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