Lewis acidity of mesoporous molecular sieves for acylation reactions

0309573 - ÚFCH JH 2009 RIV SG eng C - Konferenční příspěvek (zahraniční konf.)
Voláková, Martina - Vlk, Josef - Vitvarová, Dana - Šiklová, Helena - Čejka, Jiří
Lewis acidity of mesoporous molecular sieves for acylation reactions.
[Lewisova acidita mesoporézních molekulárních sít pro acylační reakce.]
Nanoporous Materials. Singapore: World Scientific Publ. Co. Pte. Ltd, 2008 - (Sayari, A.; Jaroniec, M.), s. 477-486. ISBN 978-981-277-915-1.
[Nanoporous Materials /5./. Vancouver (CA), 25.05.2008-28.05.2008]
Grant CEP: GA ČR GA104/07/0383
Výzkumný záměr: CEZ:AV0Z40400503
Klíčová slova: mesoporous molecular sieves * Lewis acidity * acylation reactions
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie

The effect of the concentration of Lewis acid sites on the activity and selectivity of different molecular sieve catalysts was investigated in the Friedel-Crafts acylation of ferrocene with acetic anhydride, toluene with isobutyryl chloride, and cyclohexene and 1-methylcyclohexene with propionic anhydride. H-, Zn-, Fe-, Al-, and La-forms of mesoporous molecular sieves (Al)MCM-41 and (Al)SBA-15 were studied and compared with large-pore zeolites. No general relationship between the type of cation and conversion of substrate was found. In acylation of ferrocene the highest ferrocene conversions were reached over Zn- and H-atoms while in toluene acylation Al-forms were the most active. The selectivities over mesoporous molecular sieves were lower (61-89 %) compared with zeolites (82-98 %).

Tématem práce je Lewisova acidita mesoporézních molekulárních sít pro acylační reakce.
Trvalý link: http://hdl.handle.net/11104/0161665