Gas-phase pinacol conversion on AlPO4, γ-Al2O3 and SiO2 catalysts

被引：6

作者：

Campelo, JM ^{[1
]}

Chakraborty, R ^{[1
]}

Marinas, JM ^{[1
]}

Romero, AA ^{[1
]}

机构：

[1] Univ Cordoba, Fac Sci, Dept Organ Chem, E-14004 Cordoba, Spain

来源：

CATALYSIS LETTERS | 1998年 / 54卷 / 1-2期

关键词：

AlPO4; Al2O3; SiO2; 2,3-dimethyl-2,3-butanediol conversion; activity; selectivity; poisoning by bases; pyridine; 2,6-dimethylpyridine; hexamethyldisilazane;

D O I：

10.1023/A:1019019720156

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：

Pinacol (2,3-dimethyl-2,3-butanediol) conversion over AlPO4 (Al/P = 1) and gamma-Al2O3 catalysts proceeded in two parallel reaction pathways with formation of 2,3-dimethyl-1,3-butadiene (by 1,2-elimination) and 3,3-dimethyl-2-butanone (by rearrangement), the latter being the main reaction product. The activity was in accordance with the surface acidity data as measured versus cyclohexene skeletal isomerization reaction. Thus, AlPO4 showed the highest activity (almost total conversion at 523 K). The 1,2-elimination/rearrangement ratio depended on the type of catalyst used and diene formation increased with reaction temperature. Moreover, pinacolone was a reaction intermediate for diene production.

引用

页码：91 / 93

页数：3

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