The effect of acid sites in zeolite Beta for activity and selectivity in acylation of toluene

0021973 - ÚFCH JH 2006 RIV NL eng C - Conference Paper (international conference)
Mayerová, Jana - Šťávová, G.
The effect of acid sites in zeolite Beta for activity and selectivity in acylation of toluene.
[Efekt kyselých center v zeolitu Beta v použití při acylaci toluenu.]
Studies in Surface Science and Catalysis. Vol. 158. Amsterdam: Elsevier, 2005 - (Čejka, J.; Žilková, N.; Nachtigall, P.), s. 1637-1644. Studies in Surface Science and Catalysis, Vol. 158. ISBN 0-444-52083-X.
[International Zeolite Symposium /3./ (3rd FEZA). Prague (CZ), 23.08.2005-26.08.2005]
R&D Projects: GA ČR GA203/03/0804
Institutional research plan: CEZ:AV0Z40400503
Keywords : catalysis * zeolites Beta * toluene acylation
Subject RIV: CF - Physical ; Theoretical Chemistry

Zeolite Beta of various concentrations and types of acid sites was investigated in toluene acylation with isobutyric acid derivates. Commercial and synthesized samples of Beta zeolites, were characterized by XRD, chemical analysis (CA), SEM, FT-IR, nuclear magnetic resonance and sorption measurements for maximum description of these zeolites and for better explanation of resulting activities of these catalysts in acylation reactions. The highest activities were obtained over zeolites Beta possessing the lowest Si/Al ratio and one of the highest concentrations of Lewis and Broensted acid sites.

Zeolit Beta s různou koncentrací a typem kyselých center byl použit pro acylaci toluenu deriváty kyseliny isomáselné. Komerční i syntetizované vzorky zeolitů byly charakterizovány pomocí XRD, chemické analýzy, SEM, FT-IR, sorpčních měření a jaderné magnetické resonance. Nejvyšší aktivitu ve studované reakci vykazoval zeolit Beta s nejnižším poměrem Si/Al a s nejvyšší koncentrací Broenstedovských kyselých center.
Permanent Link: http://hdl.handle.net/11104/0110806