The Effect of Acidity of Al and Fe Silicates with MFI Structure on Benzene and Toluene Alkylation with Isopropyl Alcohol

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Title:The Effect of Acidity of Al and Fe Silicates with MFI Structure on Benzene and Toluene Alkylation with Isopropyl Alcohol
Creators:
Čejka, Jiří
Žilková, Naděžda
Wichterlová, Blanka
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 61, 8, pp. 1115-1130
Uncontrolled Keywords:MFI structure, Benzene, Alkylation, Propylation, Acidity strength, Isomorphous substitution, Toluene

Abstract

Kinetic study of toluene and benzene alkylation with isopropyl alcohol on alumo- and ferrisilicates of MFI structure has shown that the alkylation activity does not follow the acidity (both the number and strength of bridging OH groups) of these molecular sieves. The rate of the overall reaction is controlled by the desorption/transport rate of bulky, strongly adsorbed cymenes and cumene. A higher concentration of <i>n</i>-propyltoluenes compared to <i>n</i>-propylbenzene, both undesired reaction products, formed via a bimolecular isomerization of isopropyl aromate with benzene or toluene, was due to the higher reactivity of isopropyltoluene with toluene in comparison with that of cumene with benzene. It is concluded that ferrisilicates of MFI structure possessing low strength acid sites appear to be promising catalysts for achieving both a high isopropyl- and <i>para</i>-selectivity in toluene alkylation to <i>p</i>-cymene.

Title:The Effect of Acidity of Al and Fe Silicates with MFI Structure on Benzene and Toluene Alkylation with Isopropyl Alcohol
Creators:
Čejka, Jiří
Žilková, Naděžda
Wichterlová, Blanka
Uncontrolled Keywords:MFI structure, Benzene, Alkylation, Propylation, Acidity strength, Isomorphous substitution, Toluene
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:61
Number:8
Page Range:pp. 1115-1130
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19961115UNSPECIFIED
ID Code:1017
Item Type:Article
Deposited On:06 Feb 2009 17:05
Last Modified:06 Feb 2009 16:05

Citation

Čejka, Jiří; Žilková, Naděžda; Wichterlová, Blanka (1996) The Effect of Acidity of Al and Fe Silicates with MFI Structure on Benzene and Toluene Alkylation with Isopropyl Alcohol. Collection of Czechoslovak Chemical Communications, 61 (8). pp. 1115-1130. ISSN 0010-0765

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