Collect. Czech. Chem. Commun.
1984, 49, 2387-2392
https://doi.org/10.1135/cccc19842387
Formation of sulphur compounds during the hydrodenitrogenation of aniline, cyclohexylamine, benzylamine, and 2-phenylethylamine on a nickel-tungsten catalyst in the presence of hydrogen sulphide
Mirko Černýa and Antonín Trkab
a Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6
b Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6
Abstract
Hydrodenitrogenations of aniline, cyclohexylamine, benzylamine, and 2-phenylethylamine were performed on a sulphided nickel-tungsten catalyst at 300°C in an autoclave filled with hydrogen in the absence and in the presence of hydrogen sulphide. Due to the presence of hydrogen sulphide the degree of conversion increased from 0.9 to 3,6% for aniline and from 72 to 99% for benzylamine, and the fraction of neutral substances increased from 2.4 to 7% for cyclohexylamine and from 5.0 to 8.9% for 2-phenylethylamine. The neutral fractions contained cyclohexanethiol, thiobenzamide, 2-phenylethanethiol, and other sulphur compounds giving evidence that the increased degree of conversion of the amines was due to the hydrogen sulphide taking direct part in the chemical reaction.
