Pd/CaCO3 as an alternative of Lindlar classic catalyst for alkyne hydrogenation

MISAEL CÓRDOBA; M. JULIANA MACCARRONE; CAROLINA BETTI; FERNANDO COLOMA-PASCUAL; MÓNICA E. QUIROGA; CECILIA R. LEDERHOS

Congreso; 16th International Congress on Catalysis (ICC 16); 2016

The alkyne partial hydrogenation using homogeneous and heterogeneous catalysts have been widely studied in the last years due to its academic and industrial interest. One of the most studied systems is the Lindlar catalyst (Pd/CaCO3 modified with Pb(OAc)2), since 1953. The objective of this work is the synthesis of an active and selective catalyst for the selective hydrogenation of a long chain alkyne. Pd/CaCO3 was prepared from an amonia palladium complex and compared with the Lindlar classical catalys. Two catalysts based in palladium on CaCO3 were compared and evaluated during the selectivehydrogenation of 1-heptyne. One of them was synthetized in the laboratory from an amino complex solutionof palladium and deposited on the support by incipient wetness technique. Another them is the Lindlarcommercial catalyst. A low loaded Pd/CaCO3 catalyst was prepared from an amino complex. Thesynthesized catalyst presented higher initial reaction rate than the commercial Lindlar catalyst with higherselectivity to 1-heptene, 90 %. Higher activity of the prepared catalyst might be related to a higher dispersion