KINETICS OF THYMOL HYDROGENATION OVER A NI-CR2O3 CATALYST

被引：17
|
作者：
ALLAKHVERDIEV, AI [1 ]
KULKOVA, N [1 ]
MURZIN, DY [1 ]
机构：
[1] LY KARPOV PHYS CHEM RES INST,RES CTR,DEPT CATALYSIS,MOSCOW 103064,RUSSIA
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1995年 / 34卷 / 05期
关键词：
D O I：
10.1021/ie00044a005
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The kinetics of thymol hydrogenation over commercial nickel-chromia catalyst with formation of four menthol diastereoisomers have been investigated in a batch reactor at constant hydrogen pressure (0.4-4 MPa) at temperatures between 373 and 433 K in n-hexane and cyclohexane solutions. The rate of thymol consumption was independent of conversion. Initially mainly more thermodynamically unstable cis isomers (neomenthol and neoisomenthol) were produced and only at relatively high conversions trans isomers (menthol and isomenthol) were formed. However the stereoselectivity values at a particular conversion were seen to be independent of hydrogen pressure and reaction temperature. The observed kinetic regularities were modeled based on an elementary step mechanism.
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收藏
页码：1539 / 1547
页数：9
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