Alkylation of benzene with alpha-olefins over zirconia supported 12-silicotungstic acid

TitleAlkylation of benzene with alpha-olefins over zirconia supported 12-silicotungstic acid
Publication TypeJournal Article
Year of Publication2005
AuthorsSawant, DP, Halligudi, SB
JournalJournal of Molecular Catalysis A - Chemical
Volume237
Issue1-2
Pagination137-145
Date PublishedAUG
Type of ArticleArticle
ISSN1381-1169
Keywords1-dodecene, 12-silicotungstic acid, Alkylation, Benzene, LAB, Zirconia
Abstract

Liquid phase alkylation of benzene to linear alkyl benzene (LAB) with alpha-olefins has been investigated with 12-silicotungstic acid supported on zirconia (STA/ZrO2) as the catalyst. Among the catalysts, 15 wt.% STA/ZrO2 calcined at 750 degrees C was found to be most active than others in the alkylation reaction. The total amount of acid sites of different STA loaded catalysts were estimated by TPD of NH3 and 15 wt.% STA/ZrO2 calcined at 750 degrees C was found to have the highest acidity and more active in the reaction. The optimization of reaction conditions of alkylation of benzene with 1-dodecene was performed with 15 wt.% STA/ZrO2 calcined at 750 degrees C by varying catalyst concentration (1-5 wt.% of reaction mixture); temperature, 373-423 K and benzene: 1-dodecene (1-dd) molar ratio, 5-15 in a Parr autoclave under N-2 pressure. Under the optimized reaction conditions, conversion of 1-dodecene (50.8%) gave high selectivity to 2-phenyl dodecane (47.1%) and the remaining 3-, 4-, 5- and 6-phenyldodecanes in 4 h. The reaction was found to be heterogeneously catalyzed and no contribution from homogeneous (leached) STA into the reaction medium. (c) 2005 Elsevier B.V. All rights reserved.

DOI10.1016/j.molcata.2005.04.042
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

3.958

Divison category: 
Catalysis and Inorganic Chemistry