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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F04%3A00101054%21RIV%2F2005%2FAV0%2FA54005%2FN
rdf:type
n11:Vysledek skos:Concept
dcterms:description
Acylace toluenu byla studována pro různé katalyzátory v kapalné fázi. Vybranými katalyzátory byla řada zeolitů Y, ZSM-5, mordenit a beta, které se liší strukturou a geometrií jejich kanálového systému a chemickým složením. Nejvyšší konverze isobutyryl chloridu bylo dosaženo po 240 min reakce s katalyzátory beta a Y. Zeolity beta a Y mají trojrozměrnou strukturu a jejich poměr Si/Al se pohyboval v rozmezí 20 – 40. Bylo zjištěno, že konverze isobutyryl chloridu roste s rostoucím rozměrem kanálového systému zeolitu. Za použití středněporézního zeolitu ZSM-5 jako katalyzátoru a širokoporézního jednorozměrného mordenitu bylo dosaženo podstatně nižší konverze isobutyryl chloridu. Nižší konverze byla způsobena pomalou desorpcí a pomalejším transportem rozměrného p-isobutyryltoluenu, který byl zadržován kanálovým systémem těchto zeolitů. Acylation of toluene in a liquid phase was investigated on the series of zeolites Y, ZSM-5, mordenite and Beta differing in the structure and geometry of their channel systems and chemical composition. The highest conversion of isobutyryl chloride after 240 min of the reaction was achieved with large pore zeolites Beta and Y having three-dimensional channel system and possessing Si/Al ratio between 15-40. It was observed that the conversion of isobutyryl chloride increases with the increase in the pore size dimensions. Over medium pore zeolite ZSM-5 and large pore one-dimensional mordenite isobutyryl chloride conversions were substantially lower due to the slow desorption and transport of bulky p-isobutyryl toluene, which is strongly held in the channel system of these zeolites. A reaction pathway for acylation reaction was proposed involving the formation of isobutyric anhydride as a reaction intermediate, which is also responsible for acylation of toluene. Acylation of toluene in a liquid phase was investigated on the series of zeolites Y, ZSM-5, mordenite and Beta differing in the structure and geometry of their channel systems and chemical composition. The highest conversion of isobutyryl chloride after 240 min of the reaction was achieved with large pore zeolites Beta and Y having three-dimensional channel system and possessing Si/Al ratio between 15-40. It was observed that the conversion of isobutyryl chloride increases with the increase in the pore size dimensions. Over medium pore zeolite ZSM-5 and large pore one-dimensional mordenite isobutyryl chloride conversions were substantially lower due to the slow desorption and transport of bulky p-isobutyryl toluene, which is strongly held in the channel system of these zeolites. A reaction pathway for acylation reaction was proposed involving the formation of isobutyric anhydride as a reaction intermediate, which is also responsible for acylation of toluene.
dcterms:title
Acylation of Toluene with Isobutyryl Chloride Acylace toluenu isobutyryl chloridem Acylation of Toluene with Isobutyryl Chloride
skos:prefLabel
Acylace toluenu isobutyryl chloridem Acylation of Toluene with Isobutyryl Chloride Acylation of Toluene with Isobutyryl Chloride
skos:notation
RIV/61388955:_____/04:00101054!RIV/2005/AV0/A54005/N
n3:strany
2717;2723
n3:aktivita
n9:Z n9:P
n3:aktivity
P(GA203/03/0804), Z(AV0Z4040901)
n3:dodaniDat
n8:2005
n3:domaciTvurceVysledku
n12:6088252 n12:7016662 n12:6503284
n3:druhVysledku
n14:D
n3:duvernostUdaju
n21:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
553492
n3:idVysledku
RIV/61388955:_____/04:00101054
n3:jazykVysledku
n13:eng
n3:klicovaSlova
acylation of toluene; isobutyryl chloride; zeolites
n3:klicoveSlovo
n6:zeolites n6:acylation%20of%20toluene n6:isobutyryl%20chloride
n3:kontrolniKodProRIV
[3AA8370F7341]
n3:mistoKonaniAkce
Cape Town
n3:mistoVydani
Cape Town
n3:nazevZdroje
Proceedings of the International Zeolite Conference
n3:obor
n4:CF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n17:GA203%2F03%2F0804
n3:rokUplatneniVysledku
n8:2004
n3:tvurceVysledku
Červený, L. Čejka, Jiří Žilková, Naděžda Klisáková, Jana
n3:typAkce
n19:WRD
n3:zahajeniAkce
2004-04-25+02:00
n3:zamer
n20:AV0Z4040901
s:numberOfPages
7
n16:hasPublisher
Neuveden
n7:isbn
0-958-46636-X