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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F13%3A00421156%21RIV14-GA0-61388955
rdf:type
n7:Vysledek skos:Concept
dcterms:description
The catalytic behavior of isomorphously substituted B-, Al-, Ga-, and Fe-containing extra-large-pore UTL zeolites was investigated in the acylation of p-xylene with benzoyl chloride and Beckmann rearrangement of 1-indanone oxime. The clear synergism between the BrOnsted acidity (i.e., the concentration and the strength of protonic acid sites) of UTL catalysts and their activity in benzoylation was established. (Ga)UTL zeolite containing the BrOnsted acid sites of medium strength is characterized by the optimum activity and selectivity in the benzoylation of p-xylene. Because of a higher accessibility of active centers, (Al)UTL zeolite appears to be a more active and selective catalyst than (Al)BEA in the benzoylation of p-xylene. In contrast to (B), (Ga), and (Al)UTL, the leaching of active sites occurs in the benzoylation over (Fe)UTL. All UTL zeolites showed 100% selectivity in the Beckmann rearrangement of 1-indanone oxime, which provides the target 3,4-dihydroquinolin-2(1H)-one. (B) and (Fe)UTL zeolites containing the weakest acid centers were found to be more active in the Beckmann rearrangement of 1-indanone oxime than (Ga) and (Al)UTL: 100% yield of the target amide was achieved in 240min of the reaction time over (B) and (Fe)UTL. The catalytic behavior of isomorphously substituted B-, Al-, Ga-, and Fe-containing extra-large-pore UTL zeolites was investigated in the acylation of p-xylene with benzoyl chloride and Beckmann rearrangement of 1-indanone oxime. The clear synergism between the BrOnsted acidity (i.e., the concentration and the strength of protonic acid sites) of UTL catalysts and their activity in benzoylation was established. (Ga)UTL zeolite containing the BrOnsted acid sites of medium strength is characterized by the optimum activity and selectivity in the benzoylation of p-xylene. Because of a higher accessibility of active centers, (Al)UTL zeolite appears to be a more active and selective catalyst than (Al)BEA in the benzoylation of p-xylene. In contrast to (B), (Ga), and (Al)UTL, the leaching of active sites occurs in the benzoylation over (Fe)UTL. All UTL zeolites showed 100% selectivity in the Beckmann rearrangement of 1-indanone oxime, which provides the target 3,4-dihydroquinolin-2(1H)-one. (B) and (Fe)UTL zeolites containing the weakest acid centers were found to be more active in the Beckmann rearrangement of 1-indanone oxime than (Ga) and (Al)UTL: 100% yield of the target amide was achieved in 240min of the reaction time over (B) and (Fe)UTL.
dcterms:title
Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites
skos:prefLabel
Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites
skos:notation
RIV/61388955:_____/13:00421156!RIV14-GA0-61388955
n7:predkladatel
n14:ico%3A61388955
n3:aktivita
n12:I n12:P
n3:aktivity
I, P(GBP106/12/G015)
n3:cisloPeriodika
7
n3:dodaniDat
n11:2014
n3:domaciTvurceVysledku
Shamzhy, Mariya n10:7106351 Opanasenko, Maksym n10:7016662
n3:druhVysledku
n15:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
74446
n3:idVysledku
RIV/61388955:_____/13:00421156
n3:jazykVysledku
n18:eng
n3:klicovaSlova
acidity; active sites; Beckmann rearrangement
n3:klicoveSlovo
n6:acidity n6:Beckmann%20rearrangement n6:active%20sites
n3:kodStatuVydavatele
DE - Spolková republika Německo
n3:kontrolniKodProRIV
[45356EC510BE]
n3:nazevZdroje
ChemCatChem
n3:obor
n16:CF
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
6
n3:projekt
n5:GBP106%2F12%2FG015
n3:rokUplatneniVysledku
n11:2013
n3:svazekPeriodika
5
n3:tvurceVysledku
Shvets, O. V. Opanasenko, Maksym Čejka, Jiří Kurfiřtová, Lenka Kubička, D. Shamzhy, Mariya
n3:wos
000320929200038
s:issn
1867-3880
s:numberOfPages
8
n13:doi
10.1002/cctc.201200925