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<p>This work deals with a study of the effect of temperature on the cyclohexylamine disproportionation to dicyclohexylamine, conjointly with the thermodynamic analysis of this process. The laboratory experiments were carried out in a glass tubular continuous-flow reactor in a gaseous phase at the reaction temperature 433–463 K over a nickel catalyst. The results show, that the temperature has a trifling effect on equilibrium conversion of cyclohexylamine. However, temperature affects the formation of hydrocarbons, benzene and cyclohexane, and dehydrogenation products of dicyclohexylamine, <italic>i.e</italic>. <italic>N</italic>-cyclohexylidenecyclohexanamine and <italic>N</italic>-phenylcyclohexylamine. The latter one is the dominant product of dicyclohexylamine dehydrogenation. The disproportionation of cyclohexylamine has slightly exothermic character. At the experimental reaction temperature range, the cyclohexylamine disproportionation is spontaneous reaction and other reactions of this process are non-spontaneous.</p>
</abstract>

This work deals with a study of the effect of temperature on the cyclohexylamine disproportionation to dicyclohexylamine, conjointly with the thermodynamic analysis of this process. The laboratory experiments were carried out in a glass tubular continuous-flow reactor in a gaseous phase at the reaction temperature 433–463 K over a nickel catalyst. The results show, that the temperature has a trifling effect on equilibrium conversion of cyclohexylamine. However, temperature affects the formation of hydrocarbons, benzene and cyclohexane, and dehydrogenation products of dicyclohexylamine, i.e. N-cyclohexylidenecyclohexanamine and N-phenylcyclohexylamine. The latter one is the dominant product of dicyclohexylamine dehydrogenation. The disproportionation of cyclohexylamine has slightly exothermic character. At the experimental reaction temperature range, the cyclohexylamine disproportionation is spontaneous reaction and other reactions of this process are non-spontaneous.

Thermodynamic analysis on disproportionation process of cyclohexylamine to dicyclohexylamine

Department of Organic Technology, Faculty of Chemical Technology

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution 4.0 International License.

This work deals with a study of the effect of temperature on the cyclohexylamine disproportionation to dicyclohexylamine, conjointly with the thermodynamic...

Thermodynamic analysis on disproportionation process of cyclohexylamine to dicyclohexylamine

Published Online: Oct 14, 2021

Page range: 43 - 48

DOI: https://doi.org/10.2478/pjct-2021-0029

Keywords
Cyclohexylamine, Dicyclohexylamine, Disproportionation, Chemical equilibrium, Thermodynamics

© 2021 Roman Valeš et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Thermodynamic analysis on disproportionation process of cyclohexylamine to dicyclohexylamine

Published Online: Oct 14, 2021

Page range: 43 - 48

DOI: https://doi.org/10.2478/pjct-2021-0029

KeywordsCyclohexylamine, Dicyclohexylamine, Disproportionation, Chemical equilibrium, Thermodynamics

© 2021 Roman Valeš et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Cyclohexylamine, Dicyclohexylamine, Disproportionation, Chemical equilibrium, Thermodynamics