Isomerization of 3-phenyl-1-propene (allylbenzene) over base catalysts

被引:13
作者
Aramendía, MA [1 ]
Borau, V [1 ]
Jiménez, C [1 ]
Marinas, A [1 ]
Marinas, JM [1 ]
Urbano, FJ [1 ]
机构
[1] Univ Cordoba, Dept Organ Chem, Cordoba 14014, Spain
关键词
test reaction; 1-phenyl-1-propene; allylbenzene; MBOH; 2-methyl-3-butyn-2-ol; acid-base characterization; double-bond isomerization;
D O I
10.1006/jcat.2002.3733
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Several magnesium containing catalysts were tested for the 2-methyl-3-butyn-2-ol (MBOH) test reaction in a microcatalytic pulse reactor. All solids showed a selectivity close to 100% toward products formed on basic sites (mainly acetone and acetylene) in the 433-623 K range. However, no correlation was found between molar conversion per gram of catalyst and basic site density, determined by temperature-programmed desorption-mass spectrometry of CO2 as the probe molecule. In the search for a process that fulfilled such a correlation, a new model reaction for base catalysts was found: isomerization of 3-phenyl-1-propene (allylbenzene) to 1-phenyl-1-propene (cis + trans). Therefore, a good correlation (r = 0.986) between molar conversion (per gram of catalyst) and basic site density was obtained at 523 K for all catalysts tested. (C) 2002 Elsevier Science (USA).
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页码:556 / 559
页数:4
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