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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F04%3A00101103%21RIV%2F2005%2FAV0%2FA54005%2FN
rdf:type
skos:Concept n16:Vysledek
dcterms:description
Katalytická aktivita zeolitů různých strukturních typů s rozdílnou koncentrací kyselých center byla studována na acylační reakci toluenu. Acylace toluenu s deriváty isobutyrové kyseliny probíhala v kapalné fázi. Nejvyšší konverze isobutyryl chloridu nebo anhydridu kyseliny isobutyrové bylo dosaženo na zeolitu beta a zeolitu Y se střední koncentrací kyselých center. Obecně konverze acylačních činidel roste s rostoucím rozměrem pórů zeolitů a dimenzí kanálového systému. Širokoporézní zeolity s trojrozměrnou kanálovou strukturou umožňují snadnější desorpci a transport rozměrného isopropyltolyl ketonu. Bylo zjištěno, že vyšší počáteční rychlosti acylace je dosaženo s anhydridem kyseliny isobutyrové. 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. 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.
dcterms:title
On the Role of Zeolite Structure and Acidity in Toluene Acylation with Isobutyric Acid Derivatives On the Role of Zeolite Structure and Acidity in Toluene Acylation with Isobutyric Acid Derivatives Vliv struktury různých typů zeolitů a jejich kyselosti na acylaci toluenu deriváty isobutyrové kyseliny
skos:prefLabel
Vliv struktury různých typů zeolitů a jejich kyselosti na acylaci toluenu deriváty isobutyrové kyseliny On the Role of Zeolite Structure and Acidity in Toluene Acylation with Isobutyric Acid Derivatives On the Role of Zeolite Structure and Acidity in Toluene Acylation with Isobutyric Acid Derivatives
skos:notation
RIV/61388955:_____/04:00101103!RIV/2005/AV0/A54005/N
n3:strany
79;86
n3:aktivita
n4:P n4:Z
n3:aktivity
P(GA203/03/0804), P(KJB4040402), Z(AV0Z4040901), Z(MSM 223100001)
n3:cisloPeriodika
1
n3:dodaniDat
n18:2005
n3:domaciTvurceVysledku
n10:7016662 n10:6088252
n3:druhVysledku
n8:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
577922
n3:idVysledku
RIV/61388955:_____/04:00101103
n3:jazykVysledku
n15:eng
n3:klicovaSlova
toluene acylation; isopropyltolyl ketone; zeolite catalysts
n3:klicoveSlovo
n11:zeolite%20catalysts n11:isopropyltolyl%20ketone n11:toluene%20acylation
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[4EB2FB78694C]
n3:nazevZdroje
Applied Catalysis
n3:obor
n17:CF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n5:GA203%2F03%2F0804 n5:KJB4040402
n3:rokUplatneniVysledku
n18:2004
n3:svazekPeriodika
272
n3:tvurceVysledku
Klisáková, Jana Červený, L. Čejka, Jiří
n3:zamer
n13:AV0Z4040901 n13:MSM%20223100001
s:issn
0926-860X
s:numberOfPages
8