INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
capítulos de libros
Título:
Effect of the catalyst preparation method on the performance of Nisupported catalysts for the synthesis of saturated amines from nitrile hydrogenation
Autor/es:
APESTEGUIA CARLOS; TRASARTI ANDRES; SEGOBIA DARIO
Libro:
Special Issue on Celebrating the 70th Anniversary of Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Editorial:
Editorial office of Chinese Journal of Catalysis
Referencias:
Año: 2019; p. 1693 - 1703
Resumen:
The liquid-phase hydrogenation of butyronitrile to saturated amines was studied on silica-supported Ni catalysts prepared by either incipient-wetness impregnation (Ni/SiO2-I) or ammonia(Ni/SiO2-A) methods. A Ni/SiO2-Al2O3-I sample was also used. Ni/SiO2-I was a non-acidic catalystcontaining large Ni0 particles of low interaction with the support, while Ni/SiO2-A was an acidiccatalyst due to the presence of Ni2+ species in Ni phyllosilicates of low reducibility. Ni/SiO2-I formedessentially butylamine (80%), and dibutylamine as the only byproduct. In contrast, Ni/SiO2-Ayielded a mixture of dibutylamine (49%) and tributylamine (45%), being the formation of butylaminealmost completely suppressed. The selective formation of secondary and tertiary amines onNi/SiO2-A was explained by considering that butylamine is not release to the liquid phase during thereaction because it is strongly adsorbed on surface acid sites contiguous to Ni0 atoms, thereby favoringthe butylimine/butylamine condensation to higher amines between adsorbed species