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Articles • J. Braz. Chem. Soc. 25 (12) • Dec 2014 • https://doi.org/10.5935/0103-5053.20140215   copy

Synthesis of n-Butylamine from Butyronitrile on Ni/SiO2: Effect of Solvent

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The effect of solvent on Ni(10.5%)/SiO2 activity and selectivity for the liquid-phase hydrogenation of butyronitrile to butylamines was studied at 373 K and 13 bar using ethanol, benzene, toluene and cyclohexane as solvents. In ethanol, a protic solvent, the Ni catalyst yielded n-butylamine (84%) and dibutylamine (16%). When non-polar solvents, such as cyclohexane, toluene or benzene, were used, the solvent-catalyst interaction strength determined the selectivity to n-butylamine: the stronger the solvent-catalyst interaction the higher the n-buylamine production. The yield to n-butylamine in non-polar solvents varied between 39% (cyclohexane) and 63% (benzene).

butyronitrile; butylamines; selective hydrogenation; Ni catalysts

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